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Sourcecode: db4.3 version File versions

db.h

/* DO NOT EDIT: automatically built by dist/s_vxworks. */
/*
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996-2004
 *    Sleepycat Software.  All rights reserved.
 *
 * $Id: db.in,v 11.463 2004/10/11 18:47:50 bostic Exp $
 *
 * db.h include file layout:
 *    General.
 *    Database Environment.
 *    Locking subsystem.
 *    Logging subsystem.
 *    Shared buffer cache (mpool) subsystem.
 *    Transaction subsystem.
 *    Access methods.
 *    Access method cursors.
 *    Dbm/Ndbm, Hsearch historic interfaces.
 */

#ifndef _DB_H_
#define     _DB_H_

#ifndef __NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <stdio.h>
#endif

#if defined(__cplusplus)
extern "C" {
#endif

/* Tornado 2 does not provide a standard C pre-processor #define. */
#ifndef __vxworks
#define     __vxworks
#endif


#undef __P
#define     __P(protos) protos

/*
 * Berkeley DB version information.
 */
#define     DB_VERSION_MAJOR  4
#define     DB_VERSION_MINOR  3
#define     DB_VERSION_PATCH  27
#define     DB_VERSION_STRING "Sleepycat Software: Berkeley DB 4.3.27: (December 22, 2004)"

/*
 * !!!
 * Berkeley DB uses specifically sized types.  If they're not provided by
 * the system, typedef them here.
 *
 * We protect them against multiple inclusion using __BIT_TYPES_DEFINED__,
 * as does BIND and Kerberos, since we don't know for sure what #include
 * files the user is using.
 *
 * !!!
 * We also provide the standard u_int, u_long etc., if they're not provided
 * by the system.
 */
#ifndef     __BIT_TYPES_DEFINED__
#define     __BIT_TYPES_DEFINED__
typedef unsigned char u_int8_t;
typedef unsigned short u_int16_t;
typedef unsigned int u_int32_t;


#endif


/*
 * uintmax_t --
 * Largest unsigned type, used to align structures in memory.  We don't store
 * floating point types in structures, so integral types should be sufficient
 * (and we don't have to worry about systems that store floats in other than
 * power-of-2 numbers of bytes).  Additionally this fixes compilers that rewrite
 * structure assignments and ANSI C memcpy calls to be in-line instructions
 * that happen to require alignment.  Note: this alignment isn't sufficient for
 * mutexes, which depend on things like cache line alignment.  Mutex alignment
 * is handled separately, in mutex.h.
 *
 * uintptr_t --
 * Unsigned type that's the same size as a pointer.  There are places where
 * DB modifies pointers by discarding the bottom bits to guarantee alignment.
 * We can't use uintmax_t, it may be larger than the pointer, and compilers
 * get upset about that.  So far we haven't run on any machine where there's
 * no unsigned type the same size as a pointer -- here's hoping.
 */
typedef unsigned long uintmax_t;
typedef unsigned long uintptr_t;

/*
 * Sequences are only available on machines with 64-bit integral types.
 */
typedef int db_seq_t;

/* Basic types that are exported or quasi-exported. */
typedef     u_int32_t   db_pgno_t;  /* Page number type. */
typedef     u_int16_t   db_indx_t;  /* Page offset type. */
#define     DB_MAX_PAGES      0xffffffff  /* >= # of pages in a file */

typedef     u_int32_t   db_recno_t; /* Record number type. */
#define     DB_MAX_RECORDS    0xffffffff  /* >= # of records in a tree */

typedef u_int32_t db_timeout_t;     /* Type of a timeout. */

/*
 * Region offsets are the difference between a pointer in a region and the
 * region's base address.  With private environments, both addresses are the
 * result of calling malloc, and we can't assume anything about what malloc
 * will return, so region offsets have to be able to hold differences between
 * arbitrary pointers.
 */
typedef     uintptr_t   roff_t;

/*
 * Forward structure declarations, so we can declare pointers and
 * applications can get type checking.
 */
struct __db;            typedef struct __db DB;
struct __db_bt_stat;    typedef struct __db_bt_stat DB_BTREE_STAT;
struct __db_cipher;     typedef struct __db_cipher DB_CIPHER;
struct __db_dbt;  typedef struct __db_dbt DBT;
struct __db_env;  typedef struct __db_env DB_ENV;
struct __db_h_stat;     typedef struct __db_h_stat DB_HASH_STAT;
struct __db_ilock;      typedef struct __db_ilock DB_LOCK_ILOCK;
struct __db_lock_stat;  typedef struct __db_lock_stat DB_LOCK_STAT;
struct __db_lock_u;     typedef struct __db_lock_u DB_LOCK;
struct __db_lockreq;    typedef struct __db_lockreq DB_LOCKREQ;
struct __db_log_cursor; typedef struct __db_log_cursor DB_LOGC;
struct __db_log_stat;   typedef struct __db_log_stat DB_LOG_STAT;
struct __db_lsn;  typedef struct __db_lsn DB_LSN;
struct __db_mpool;      typedef struct __db_mpool DB_MPOOL;
struct __db_mpool_fstat;typedef struct __db_mpool_fstat DB_MPOOL_FSTAT;
struct __db_mpool_stat; typedef struct __db_mpool_stat DB_MPOOL_STAT;
struct __db_mpoolfile;  typedef struct __db_mpoolfile DB_MPOOLFILE;
struct __db_preplist;   typedef struct __db_preplist DB_PREPLIST;
struct __db_qam_stat;   typedef struct __db_qam_stat DB_QUEUE_STAT;
struct __db_rep;  typedef struct __db_rep DB_REP;
struct __db_rep_stat;   typedef struct __db_rep_stat DB_REP_STAT;
struct __db_sequence;   typedef struct __db_sequence DB_SEQUENCE;
struct __db_seq_record; typedef struct __db_seq_record DB_SEQ_RECORD;
struct __db_seq_stat;   typedef struct __db_seq_stat DB_SEQUENCE_STAT;
struct __db_txn;  typedef struct __db_txn DB_TXN;
struct __db_txn_active; typedef struct __db_txn_active DB_TXN_ACTIVE;
struct __db_txn_stat;   typedef struct __db_txn_stat DB_TXN_STAT;
struct __db_txnmgr;     typedef struct __db_txnmgr DB_TXNMGR;
struct __dbc;           typedef struct __dbc DBC;
struct __dbc_internal;  typedef struct __dbc_internal DBC_INTERNAL;
struct __fh_t;          typedef struct __fh_t DB_FH;
struct __fname;         typedef struct __fname FNAME;
struct __key_range;     typedef struct __key_range DB_KEY_RANGE;
struct __mpoolfile;     typedef struct __mpoolfile MPOOLFILE;
struct __mutex_t; typedef struct __mutex_t DB_MUTEX;

/* Key/data structure -- a Data-Base Thang. */
struct __db_dbt {
      /*
       * data/size must be fields 1 and 2 for DB 1.85 compatibility.
       */
      void   *data;                 /* Key/data */
      u_int32_t size;               /* key/data length */

      u_int32_t ulen;               /* RO: length of user buffer. */
      u_int32_t dlen;               /* RO: get/put record length. */
      u_int32_t doff;               /* RO: get/put record offset. */

#define     DB_DBT_APPMALLOC  0x001 /* Callback allocated memory. */
#define     DB_DBT_ISSET            0x002 /* Lower level calls set value. */
#define     DB_DBT_MALLOC           0x004 /* Return in malloc'd memory. */
#define     DB_DBT_PARTIAL          0x008 /* Partial put/get. */
#define     DB_DBT_REALLOC          0x010 /* Return in realloc'd memory. */
#define     DB_DBT_USERMEM          0x020 /* Return in user's memory. */
#define     DB_DBT_DUPOK            0x040 /* Insert if duplicate. */
      u_int32_t flags;
};

/*
 * Common flags --
 *    Interfaces which use any of these common flags should never have
 *    interface specific flags in this range.
 */
#define     DB_CREATE         0x0000001   /* Create file as necessary. */
#define     DB_CXX_NO_EXCEPTIONS  0x0000002     /* C++: return error values. */
#define     DB_FORCE          0x0000004   /* Force (anything). */
#define     DB_NOMMAP         0x0000008   /* Don't mmap underlying file. */
#define     DB_RDONLY         0x0000010   /* Read-only (O_RDONLY). */
#define     DB_RECOVER        0x0000020   /* Run normal recovery. */
#define     DB_THREAD         0x0000040   /* Applications are threaded. */
#define     DB_TRUNCATE       0x0000080   /* Discard existing DB (O_TRUNC). */
#define     DB_TXN_NOSYNC           0x0000100   /* Do not sync log on commit. */
#define     DB_TXN_NOT_DURABLE    0x0000200     /* Do not log changes. */
#define     DB_USE_ENVIRON          0x0000400   /* Use the environment. */
#define     DB_USE_ENVIRON_ROOT   0x0000800     /* Use the environment if root. */

/*
 * Common flags --
 *    Interfaces which use any of these common flags should never have
 *    interface specific flags in this range.
 *
 * DB_AUTO_COMMIT:
 *    DB_ENV->set_flags, DB->associate, DB->del, DB->put, DB->open,
 *    DB->remove, DB->rename, DB->truncate
 * DB_DEGREE_2:
 *    DB->cursor, DB->get, DB->join, DBcursor->c_get, DB_ENV->txn_begin
 * DB_DIRTY_READ:
 *    DB->cursor, DB->get, DB->join, DB->open, DBcursor->c_get,
 *    DB_ENV->txn_begin
 * DB_NOAUTO_COMMIT
 *    DB->associate, DB->del, DB->put, DB->open,
 *    DB->remove, DB->rename, DB->truncate
 *
 * !!!
 * The DB_DIRTY_READ and DB_DEGREE_2 bit masks can't be changed without
 * also changing the masks for the flags that can be OR'd into DB
 * access method and cursor operation values.
 */
#define     DB_AUTO_COMMIT          0x01000000/* Implied transaction. */
#define     DB_DEGREE_2       0x02000000/* Degree 2. */
#define     DB_DIRTY_READ           0x04000000/* Dirty Read. */
#define     DB_NO_AUTO_COMMIT     0x08000000/* Override env-wide AUTOCOMMIT. */

/*
 * Flags private to db_env_create.
 */
#define     DB_RPCCLIENT            0x0000001   /* An RPC client environment. */

/*
 * Flags private to db_create.
 */
#define     DB_REP_CREATE           0x0000001   /* Open of an internal rep database. */
#define     DB_XA_CREATE            0x0000002   /* Open in an XA environment. */

/*
 * Flags private to DB_ENV->open.
 *       Shared flags up to 0x0000800 */
#define     DB_INIT_CDB       0x0001000   /* Concurrent Access Methods. */
#define     DB_INIT_LOCK            0x0002000   /* Initialize locking. */
#define     DB_INIT_LOG       0x0004000   /* Initialize logging. */
#define     DB_INIT_MPOOL           0x0008000   /* Initialize mpool. */
#define     DB_INIT_REP       0x0010000   /* Initialize replication. */
#define     DB_INIT_TXN       0x0020000   /* Initialize transactions. */
#define     DB_JOINENV        0x0040000   /* Initialize all subsystems present. */
#define     DB_LOCKDOWN       0x0080000   /* Lock memory into physical core. */
#define     DB_PRIVATE        0x0100000   /* DB_ENV is process local. */
#define     DB_RECOVER_FATAL      0x0200000     /* Run catastrophic recovery. */
#define     DB_SYSTEM_MEM           0x0400000   /* Use system-backed memory. */

/*
 * Flags private to DB->open.
 *       Shared flags up to 0x0000800 */
#define     DB_EXCL                 0x0001000   /* Exclusive open (O_EXCL). */
#define     DB_FCNTL_LOCKING      0x0002000     /* UNDOC: fcntl(2) locking. */
#define     DB_RDWRMASTER           0x0004000   /* UNDOC: allow subdb master open R/W */
#define     DB_WRITEOPEN            0x0008000   /* UNDOC: open with write lock. */

/*
 * Flags private to DB_ENV->txn_begin.
 *       Shared flags up to 0x0000800 */
#define     DB_TXN_NOWAIT           0x0001000   /* Do not wait for locks in this TXN. */
#define     DB_TXN_SYNC       0x0002000   /* Always sync log on commit. */

/*
 * Flags private to DB_ENV->set_encrypt.
 */
#define     DB_ENCRYPT_AES          0x0000001   /* AES, assumes SHA1 checksum */

/*
 * Flags private to DB_ENV->set_flags.
 *       Shared flags up to 0x00000800 */
#define     DB_CDB_ALLDB            0x00001000/* Set CDB locking per environment. */
#define     DB_DIRECT_DB            0x00002000/* Don't buffer databases in the OS. */
#define     DB_DIRECT_LOG           0x00004000/* Don't buffer log files in the OS. */
#define     DB_DSYNC_LOG            0x00008000/* Set O_DSYNC on the log. */
#define     DB_LOG_AUTOREMOVE     0x00010000/* Automatically remove log files. */
#define     DB_LOG_INMEMORY       0x00020000/* Store logs in buffers in memory. */
#define     DB_NOLOCKING            0x00040000/* Set locking/mutex behavior. */
#define     DB_NOPANIC        0x00080000/* Set panic state per DB_ENV. */
#define     DB_OVERWRITE            0x00100000/* Overwrite unlinked region files. */
#define     DB_PANIC_ENVIRONMENT  0x00200000/* Set panic state per environment. */
#define     DB_REGION_INIT          0x00400000/* Page-fault regions on open. */
#define     DB_TIME_NOTGRANTED    0x00800000/* Return NOTGRANTED on timeout. */
/*          Shared flags at 0x01000000 */
/*          Shared flags at 0x02000000 */
/*          Shared flags at 0x04000000 */
/*          Shared flags at 0x08000000 */
#define     DB_TXN_WRITE_NOSYNC   0x10000000/* Write, don't sync, on txn commit. */
#define     DB_YIELDCPU       0x20000000/* Yield the CPU (a lot). */

/*
 * Flags private to DB->set_feedback's callback.
 */
#define     DB_UPGRADE        0x0000001   /* Upgrading. */
#define     DB_VERIFY         0x0000002   /* Verifying. */

/*
 * Flags private to DB_MPOOLFILE->open.
 *       Shared flags up to 0x0000800 */
#define     DB_DIRECT         0x0001000   /* Don't buffer the file in the OS. */
#define     DB_DURABLE_UNKNOWN    0x0002000 /* internal: durability on open. */
#define     DB_EXTENT         0x0004000   /* internal: dealing with an extent. */
#define     DB_ODDFILESIZE          0x0008000   /* Truncate file to N * pgsize. */

/*
 * Flags private to DB->set_flags.
 */
#define     DB_CHKSUM         0x0000001   /* Do checksumming */
#define     DB_DUP                  0x0000002   /* Btree, Hash: duplicate keys. */
#define     DB_DUPSORT        0x0000004   /* Btree, Hash: duplicate keys. */
#define     DB_ENCRYPT        0x0000008   /* Btree, Hash: duplicate keys. */
#define     DB_INORDER        0x0000010   /* Queue: strict ordering on consume. */
#define     DB_RECNUM         0x0000020   /* Btree: record numbers. */
#define     DB_RENUMBER       0x0000040   /* Recno: renumber on insert/delete. */
#define     DB_REVSPLITOFF          0x0000080   /* Btree: turn off reverse splits. */
#define     DB_SNAPSHOT       0x0000100   /* Recno: snapshot the input. */

/*
 * Flags private to the DB_ENV->stat_print, DB->stat and DB->stat_print methods.
 */
#define     DB_STAT_ALL       0x0000001   /* Print: Everything. */
#define     DB_STAT_CLEAR           0x0000002   /* Clear stat after returning values. */
#define     DB_STAT_LOCK_CONF     0x0000004     /* Print: Lock conflict matrix. */
#define     DB_STAT_LOCK_LOCKERS  0x0000008     /* Print: Lockers. */
#define     DB_STAT_LOCK_OBJECTS  0x0000010     /* Print: Lock objects. */
#define     DB_STAT_LOCK_PARAMS   0x0000020     /* Print: Lock parameters. */
#define     DB_STAT_MEMP_HASH     0x0000040     /* Print: Mpool hash buckets. */
#define     DB_STAT_SUBSYSTEM     0x0000080     /* Print: Subsystems too. */

/*
 * Flags private to DB->join.
 */
#define     DB_JOIN_NOSORT          0x0000001   /* Don't try to optimize join. */

/*
 * Flags private to DB->verify.
 */
#define     DB_AGGRESSIVE           0x0000001   /* Salvage whatever could be data.*/
#define     DB_NOORDERCHK           0x0000002   /* Skip sort order/hashing check. */
#define     DB_ORDERCHKONLY         0x0000004   /* Only perform the order check. */
#define     DB_PR_PAGE        0x0000008   /* Show page contents (-da). */
#define     DB_PR_RECOVERYTEST    0x0000010     /* Recovery test (-dr). */
#define     DB_PRINTABLE            0x0000020   /* Use printable format for salvage. */
#define     DB_SALVAGE        0x0000040   /* Salvage what looks like data. */
#define     DB_UNREF          0x0000080   /* Report unreferenced pages. */
/*
 * !!!
 * These must not go over 0x8000, or they will collide with the flags
 * used by __bam_vrfy_subtree.
 */

/*
 * Flags private to DB->set_rep_transport's send callback.
 */
#define     DB_REP_NOBUFFER         0x0000001   /* Do not buffer this message. */
#define     DB_REP_PERMANENT      0x0000002     /* Important--app. may want to flush. */

/*******************************************************
 * Locking.
 *******************************************************/
#define     DB_LOCKVERSION    1

#define     DB_FILE_ID_LEN          20    /* Unique file ID length. */

/*
 * Deadlock detector modes; used in the DB_ENV structure to configure the
 * locking subsystem.
 */
#define     DB_LOCK_NORUN           0
#define     DB_LOCK_DEFAULT         1     /* Default policy. */
#define     DB_LOCK_EXPIRE          2     /* Only expire locks, no detection. */
#define     DB_LOCK_MAXLOCKS  3     /* Select locker with max locks. */
#define     DB_LOCK_MAXWRITE  4     /* Select locker with max writelocks. */
#define     DB_LOCK_MINLOCKS  5     /* Select locker with min locks. */
#define     DB_LOCK_MINWRITE  6     /* Select locker with min writelocks. */
#define     DB_LOCK_OLDEST          7     /* Select oldest locker. */
#define     DB_LOCK_RANDOM          8     /* Select random locker. */
#define     DB_LOCK_YOUNGEST  9     /* Select youngest locker. */

/* Flag values for lock_vec(), lock_get(). */
#define     DB_LOCK_ABORT           0x001 /* Internal: Lock during abort. */
#define     DB_LOCK_NOWAIT          0x002 /* Don't wait on unavailable lock. */
#define     DB_LOCK_RECORD          0x004 /* Internal: record lock. */
#define     DB_LOCK_REMOVE          0x008 /* Internal: flag object removed. */
#define     DB_LOCK_SET_TIMEOUT     0x010 /* Internal: set lock timeout. */
#define     DB_LOCK_SWITCH          0x020 /* Internal: switch existing lock. */
#define     DB_LOCK_UPGRADE         0x040 /* Internal: upgrade existing lock. */

/*
 * Simple R/W lock modes and for multi-granularity intention locking.
 *
 * !!!
 * These values are NOT random, as they are used as an index into the lock
 * conflicts arrays, i.e., DB_LOCK_IWRITE must be == 3, and DB_LOCK_IREAD
 * must be == 4.
 */
typedef enum {
      DB_LOCK_NG=0,                 /* Not granted. */
      DB_LOCK_READ=1,               /* Shared/read. */
      DB_LOCK_WRITE=2,        /* Exclusive/write. */
      DB_LOCK_WAIT=3,               /* Wait for event */
      DB_LOCK_IWRITE=4,       /* Intent exclusive/write. */
      DB_LOCK_IREAD=5,        /* Intent to share/read. */
      DB_LOCK_IWR=6,                /* Intent to read and write. */
      DB_LOCK_DIRTY=7,        /* Dirty Read. */
      DB_LOCK_WWRITE=8        /* Was Written. */
} db_lockmode_t;

/*
 * Request types.
 */
typedef enum {
      DB_LOCK_DUMP=0,               /* Display held locks. */
      DB_LOCK_GET=1,                /* Get the lock. */
      DB_LOCK_GET_TIMEOUT=2,        /* Get lock with a timeout. */
      DB_LOCK_INHERIT=3,            /* Pass locks to parent. */
      DB_LOCK_PUT=4,                /* Release the lock. */
      DB_LOCK_PUT_ALL=5,            /* Release locker's locks. */
      DB_LOCK_PUT_OBJ=6,            /* Release locker's locks on obj. */
      DB_LOCK_PUT_READ=7,           /* Release locker's read locks. */
      DB_LOCK_TIMEOUT=8,            /* Force a txn to timeout. */
      DB_LOCK_TRADE=9,        /* Trade locker ids on a lock. */
      DB_LOCK_UPGRADE_WRITE=10      /* Upgrade writes for dirty reads. */
} db_lockop_t;

/*
 * Status of a lock.
 */
typedef enum  {
      DB_LSTAT_ABORTED=1,           /* Lock belongs to an aborted txn. */
      DB_LSTAT_EXPIRED=2,           /* Lock has expired. */
      DB_LSTAT_FREE=3,        /* Lock is unallocated. */
      DB_LSTAT_HELD=4,        /* Lock is currently held. */
      DB_LSTAT_NOTEXIST=5,          /* Object on which lock was waiting
                               * was removed */
      DB_LSTAT_PENDING=6,           /* Lock was waiting and has been
                               * promoted; waiting for the owner
                               * to run and upgrade it to held. */
      DB_LSTAT_WAITING=7            /* Lock is on the wait queue. */
}db_status_t;

/* Lock statistics structure. */
struct __db_lock_stat {
      u_int32_t st_id;        /* Last allocated locker ID. */
      u_int32_t st_cur_maxid;       /* Current maximum unused ID. */
      u_int32_t st_maxlocks;        /* Maximum number of locks in table. */
      u_int32_t st_maxlockers;      /* Maximum num of lockers in table. */
      u_int32_t st_maxobjects;      /* Maximum num of objects in table. */
      int     st_nmodes;            /* Number of lock modes. */
      u_int32_t st_nlocks;          /* Current number of locks. */
      u_int32_t st_maxnlocks;       /* Maximum number of locks so far. */
      u_int32_t st_nlockers;        /* Current number of lockers. */
      u_int32_t st_maxnlockers;     /* Maximum number of lockers so far. */
      u_int32_t st_nobjects;        /* Current number of objects. */
      u_int32_t st_maxnobjects;     /* Maximum number of objects so far. */
      u_int32_t st_nconflicts;      /* Number of lock conflicts. */
      u_int32_t st_nrequests;       /* Number of lock gets. */
      u_int32_t st_nreleases;       /* Number of lock puts. */
      u_int32_t st_nnowaits;        /* Number of requests that would have
                                 waited, but NOWAIT was set. */
      u_int32_t st_ndeadlocks;      /* Number of lock deadlocks. */
      db_timeout_t st_locktimeout;  /* Lock timeout. */
      u_int32_t st_nlocktimeouts;   /* Number of lock timeouts. */
      db_timeout_t st_txntimeout;   /* Transaction timeout. */
      u_int32_t st_ntxntimeouts;    /* Number of transaction timeouts. */
      u_int32_t st_region_wait;     /* Region lock granted after wait. */
      u_int32_t st_region_nowait;   /* Region lock granted without wait. */
      roff_t        st_regsize;           /* Region size. */
};

/*
 * DB_LOCK_ILOCK --
 *    Internal DB access method lock.
 */
struct __db_ilock {
      db_pgno_t pgno;               /* Page being locked. */
      u_int8_t fileid[DB_FILE_ID_LEN];/* File id. */
#define     DB_HANDLE_LOCK    1
#define     DB_RECORD_LOCK    2
#define     DB_PAGE_LOCK      3
      u_int32_t type;               /* Type of lock. */
};

/*
 * DB_LOCK --
 *    The structure is allocated by the caller and filled in during a
 *    lock_get request (or a lock_vec/DB_LOCK_GET).
 */
struct __db_lock_u {
      roff_t            off;        /* Offset of the lock in the region */
      u_int32_t   ndx;        /* Index of the object referenced by
                               * this lock; used for locking. */
      u_int32_t   gen;        /* Generation number of this lock. */
      db_lockmode_t     mode;       /* mode of this lock. */
};

/* Lock request structure. */
struct __db_lockreq {
      db_lockop_t  op;        /* Operation. */
      db_lockmode_t      mode;            /* Requested mode. */
      db_timeout_t       timeout;   /* Time to expire lock. */
      DBT         *obj;       /* Object being locked. */
      DB_LOCK            lock;            /* Lock returned. */
};

/*******************************************************
 * Logging.
 *******************************************************/
#define     DB_LOGVERSION     10          /* Current log version. */
#define     DB_LOGOLDVER      10          /* Oldest log version supported. */
#define     DB_LOGMAGIC 0x040988

/* Flag values for DB_ENV->log_archive(). */
#define     DB_ARCH_ABS 0x001       /* Absolute pathnames. */
#define     DB_ARCH_DATA      0x002       /* Data files. */
#define     DB_ARCH_LOG 0x004       /* Log files. */
#define     DB_ARCH_REMOVE    0x008 /* Remove log files. */

/* Flag values for DB_ENV->log_put(). */
#define     DB_FLUSH          0x001 /* Flush data to disk (public). */
#define     DB_LOG_CHKPNT           0x002 /* Flush supports a checkpoint */
#define     DB_LOG_COMMIT           0x004 /* Flush supports a commit */
#define     DB_LOG_NOCOPY           0x008 /* Don't copy data */
#define     DB_LOG_NOT_DURABLE      0x010 /* Do not log; keep in memory */
#define     DB_LOG_PERM       0x020 /* Flag record with REP_PERMANENT */
#define     DB_LOG_RESEND           0x040 /* Resent log record */
#define     DB_LOG_WRNOSYNC         0x080 /* Write, don't sync log_put */

/*
 * A DB_LSN has two parts, a fileid which identifies a specific file, and an
 * offset within that file.  The fileid is an unsigned 4-byte quantity that
 * uniquely identifies a file within the log directory -- currently a simple
 * counter inside the log.  The offset is also an unsigned 4-byte value.  The
 * log manager guarantees the offset is never more than 4 bytes by switching
 * to a new log file before the maximum length imposed by an unsigned 4-byte
 * offset is reached.
 */
struct __db_lsn {
      u_int32_t   file;       /* File ID. */
      u_int32_t   offset;           /* File offset. */
};

/*
 * Application-specified log record types start at DB_user_BEGIN, and must not
 * equal or exceed DB_debug_FLAG.
 *
 * DB_debug_FLAG is the high-bit of the u_int32_t that specifies a log record
 * type.  If the flag is set, it's a log record that was logged for debugging
 * purposes only, even if it reflects a database change -- the change was part
 * of a non-durable transaction.
 */
#define     DB_user_BEGIN           10000
#define     DB_debug_FLAG           0x80000000

/*
 * DB_LOGC --
 *    Log cursor.
 */
struct __db_log_cursor {
      DB_ENV       *dbenv;          /* Enclosing dbenv. */

      DB_FH  *c_fhp;          /* File handle. */
      DB_LSN        c_lsn;          /* Cursor: LSN */
      u_int32_t c_len;        /* Cursor: record length */
      u_int32_t c_prev;       /* Cursor: previous record's offset */

      DBT     c_dbt;          /* Return DBT. */

#define     DB_LOGC_BUF_SIZE  (32 * 1024)
      u_int8_t *bp;                 /* Allocated read buffer. */
      u_int32_t bp_size;            /* Read buffer length in bytes. */
      u_int32_t bp_rlen;            /* Read buffer valid data length. */
      DB_LSN        bp_lsn;         /* Read buffer first byte LSN. */

      u_int32_t bp_maxrec;          /* Max record length in the log file. */

                              /* Methods. */
      int (*close) __P((DB_LOGC *, u_int32_t));
      int (*get) __P((DB_LOGC *, DB_LSN *, DBT *, u_int32_t));

#define     DB_LOG_DISK       0x01  /* Log record came from disk. */
#define     DB_LOG_LOCKED           0x02  /* Log region already locked */
#define     DB_LOG_SILENT_ERR 0x04  /* Turn-off error messages. */
      u_int32_t flags;
};

/* Log statistics structure. */
struct __db_log_stat {
      u_int32_t st_magic;           /* Log file magic number. */
      u_int32_t st_version;         /* Log file version number. */
      int     st_mode;              /* Log file mode. */
      u_int32_t st_lg_bsize;        /* Log buffer size. */
      u_int32_t st_lg_size;         /* Log file size. */
      u_int32_t st_w_bytes;         /* Bytes to log. */
      u_int32_t st_w_mbytes;        /* Megabytes to log. */
      u_int32_t st_wc_bytes;        /* Bytes to log since checkpoint. */
      u_int32_t st_wc_mbytes;       /* Megabytes to log since checkpoint. */
      u_int32_t st_wcount;          /* Total writes to the log. */
      u_int32_t st_wcount_fill;     /* Overflow writes to the log. */
      u_int32_t st_scount;          /* Total syncs to the log. */
      u_int32_t st_region_wait;     /* Region lock granted after wait. */
      u_int32_t st_region_nowait;   /* Region lock granted without wait. */
      u_int32_t st_cur_file;        /* Current log file number. */
      u_int32_t st_cur_offset;      /* Current log file offset. */
      u_int32_t st_disk_file;       /* Known on disk log file number. */
      u_int32_t st_disk_offset;     /* Known on disk log file offset. */
      roff_t        st_regsize;           /* Region size. */
      u_int32_t st_maxcommitperflush;     /* Max number of commits in a flush. */
      u_int32_t st_mincommitperflush;     /* Min number of commits in a flush. */
};

/*
 * We need to record the first log record of a transaction.
 * For user defined logging this macro returns the place to
 * put that information, if it is need in rlsnp, otherwise it
 * leaves it unchanged.
 */
#define     DB_SET_BEGIN_LSNP(txn, rlsnp) ((txn)->set_begin_lsnp(txn, rlsnp))

/*******************************************************
 * Shared buffer cache (mpool).
 *******************************************************/
/* Flag values for DB_MPOOLFILE->get. */
#define     DB_MPOOL_CREATE         0x001 /* Create a page. */
#define     DB_MPOOL_LAST           0x002 /* Return the last page. */
#define     DB_MPOOL_NEW            0x004 /* Create a new page. */

/* Flag values for DB_MPOOLFILE->put, DB_MPOOLFILE->set. */
#define     DB_MPOOL_CLEAN          0x001 /* Page is not modified. */
#define     DB_MPOOL_DIRTY          0x002 /* Page is modified. */
#define     DB_MPOOL_DISCARD  0x004 /* Don't cache the page. */
#define     DB_MPOOL_FREE           0x008 /* Free page if present. */

/* Flags values for DB_MPOOLFILE->set_flags. */
#define     DB_MPOOL_NOFILE         0x001 /* Never open a backing file. */
#define     DB_MPOOL_UNLINK         0x002 /* Unlink the file on last close. */

/* Priority values for DB_MPOOLFILE->set_priority. */
typedef enum {
      DB_PRIORITY_VERY_LOW=1,
      DB_PRIORITY_LOW=2,
      DB_PRIORITY_DEFAULT=3,
      DB_PRIORITY_HIGH=4,
      DB_PRIORITY_VERY_HIGH=5
} DB_CACHE_PRIORITY;

/* Per-process DB_MPOOLFILE information. */
struct __db_mpoolfile {
      DB_FH   *fhp;                 /* Underlying file handle. */

      /*
       * !!!
       * The ref, pinref and q fields are protected by the region lock.
       */
      u_int32_t  ref;               /* Reference count. */

      u_int32_t pinref;       /* Pinned block reference count. */

      /*
       * !!!
       * Explicit representations of structures from queue.h.
       * TAILQ_ENTRY(__db_mpoolfile) q;
       */
      struct {
            struct __db_mpoolfile *tqe_next;
            struct __db_mpoolfile **tqe_prev;
      } q;                    /* Linked list of DB_MPOOLFILE's. */

      /*
       * !!!
       * The rest of the fields (with the exception of the MP_FLUSH flag)
       * are not thread-protected, even when they may be modified at any
       * time by the application.  The reason is the DB_MPOOLFILE handle
       * is single-threaded from the viewpoint of the application, and so
       * the only fields needing to be thread-protected are those accessed
       * by checkpoint or sync threads when using DB_MPOOLFILE structures
       * to flush buffers from the cache.
       */
      DB_ENV             *dbenv;          /* Overlying DB_ENV. */
      MPOOLFILE      *mfp;          /* Underlying MPOOLFILE. */

      u_int32_t   clear_len;  /* Cleared length on created pages. */
      u_int8_t                /* Unique file ID. */
                  fileid[DB_FILE_ID_LEN];
      int         ftype;            /* File type. */
      int32_t           lsn_offset; /* LSN offset in page. */
      u_int32_t   gbytes, bytes;    /* Maximum file size. */
      DBT          *pgcookie; /* Byte-string passed to pgin/pgout. */
      DB_CACHE_PRIORITY       /* Cache priority. */
                  priority;

      void         *addr;           /* Address of mmap'd region. */
      size_t            len;        /* Length of mmap'd region. */

      u_int32_t   config_flags;     /* Flags to DB_MPOOLFILE->set_flags. */

                              /* Methods. */
      int (*close) __P((DB_MPOOLFILE *, u_int32_t));
      int (*get) __P((DB_MPOOLFILE *, db_pgno_t *, u_int32_t, void *));
      int (*open) __P((DB_MPOOLFILE *, const char *, u_int32_t, int, size_t));
      int (*put) __P((DB_MPOOLFILE *, void *, u_int32_t));
      int (*set) __P((DB_MPOOLFILE *, void *, u_int32_t));
      int (*get_clear_len) __P((DB_MPOOLFILE *, u_int32_t *));
      int (*set_clear_len) __P((DB_MPOOLFILE *, u_int32_t));
      int (*get_fileid) __P((DB_MPOOLFILE *, u_int8_t *));
      int (*set_fileid) __P((DB_MPOOLFILE *, u_int8_t *));
      int (*get_flags) __P((DB_MPOOLFILE *, u_int32_t *));
      int (*set_flags) __P((DB_MPOOLFILE *, u_int32_t, int));
      int (*get_ftype) __P((DB_MPOOLFILE *, int *));
      int (*set_ftype) __P((DB_MPOOLFILE *, int));
      int (*get_lsn_offset) __P((DB_MPOOLFILE *, int32_t *));
      int (*set_lsn_offset) __P((DB_MPOOLFILE *, int32_t));
      int (*get_maxsize) __P((DB_MPOOLFILE *, u_int32_t *, u_int32_t *));
      int (*set_maxsize) __P((DB_MPOOLFILE *, u_int32_t, u_int32_t));
      int (*get_pgcookie) __P((DB_MPOOLFILE *, DBT *));
      int (*set_pgcookie) __P((DB_MPOOLFILE *, DBT *));
      int (*get_priority) __P((DB_MPOOLFILE *, DB_CACHE_PRIORITY *));
      int (*set_priority) __P((DB_MPOOLFILE *, DB_CACHE_PRIORITY));
      int (*sync) __P((DB_MPOOLFILE *));

      /*
       * MP_FILEID_SET, MP_OPEN_CALLED and MP_READONLY do not need to be
       * thread protected because they are initialized before the file is
       * linked onto the per-process lists, and never modified.
       *
       * MP_FLUSH is thread protected because it is potentially read/set by
       * multiple threads of control.
       */
#define     MP_FILEID_SET     0x001       /* Application supplied a file ID. */
#define     MP_FLUSH    0x002       /* Was opened to flush a buffer. */
#define     MP_OPEN_CALLED    0x004       /* File opened. */
#define     MP_READONLY 0x008       /* File is readonly. */
      u_int32_t  flags;
};

/* Mpool statistics structure. */
struct __db_mpool_stat {
      u_int32_t st_gbytes;          /* Total cache size: GB. */
      u_int32_t st_bytes;           /* Total cache size: B. */
      u_int32_t st_ncache;          /* Number of caches. */
      roff_t        st_regsize;           /* Region size. */
      size_t        st_mmapsize;          /* Maximum file size for mmap. */
      int     st_maxopenfd;         /* Maximum number of open fd's. */
      int     st_maxwrite;          /* Maximum buffers to write. */
      int     st_maxwrite_sleep;    /* Sleep after writing max buffers. */
      u_int32_t st_map;       /* Pages from mapped files. */
      u_int32_t st_cache_hit;       /* Pages found in the cache. */
      u_int32_t st_cache_miss;      /* Pages not found in the cache. */
      u_int32_t st_page_create;     /* Pages created in the cache. */
      u_int32_t st_page_in;         /* Pages read in. */
      u_int32_t st_page_out;        /* Pages written out. */
      u_int32_t st_ro_evict;        /* Clean pages forced from the cache. */
      u_int32_t st_rw_evict;        /* Dirty pages forced from the cache. */
      u_int32_t st_page_trickle;    /* Pages written by memp_trickle. */
      u_int32_t st_pages;           /* Total number of pages. */
      u_int32_t st_page_clean;      /* Clean pages. */
      u_int32_t st_page_dirty;      /* Dirty pages. */
      u_int32_t st_hash_buckets;    /* Number of hash buckets. */
      u_int32_t st_hash_searches;   /* Total hash chain searches. */
      u_int32_t st_hash_longest;    /* Longest hash chain searched. */
      u_int32_t st_hash_examined;   /* Total hash entries searched. */
      u_int32_t st_hash_nowait;     /* Hash lock granted with nowait. */
      u_int32_t st_hash_wait;       /* Hash lock granted after wait. */
      u_int32_t st_hash_max_wait;   /* Max hash lock granted after wait. */
      u_int32_t st_region_nowait;   /* Region lock granted with nowait. */
      u_int32_t st_region_wait;     /* Region lock granted after wait. */
      u_int32_t st_alloc;           /* Number of page allocations. */
      u_int32_t st_alloc_buckets;   /* Buckets checked during allocation. */
      u_int32_t st_alloc_max_buckets;     /* Max checked during allocation. */
      u_int32_t st_alloc_pages;     /* Pages checked during allocation. */
      u_int32_t st_alloc_max_pages; /* Max checked during allocation. */
};

/* Mpool file statistics structure. */
struct __db_mpool_fstat {
      char *file_name;        /* File name. */
      u_int32_t st_pagesize;        /* Page size. */
      u_int32_t st_map;       /* Pages from mapped files. */
      u_int32_t st_cache_hit;       /* Pages found in the cache. */
      u_int32_t st_cache_miss;      /* Pages not found in the cache. */
      u_int32_t st_page_create;     /* Pages created in the cache. */
      u_int32_t st_page_in;         /* Pages read in. */
      u_int32_t st_page_out;        /* Pages written out. */
};

/*******************************************************
 * Transactions and recovery.
 *******************************************************/
#define     DB_TXNVERSION     1

typedef enum {
      DB_TXN_ABORT=0,               /* Public. */
      DB_TXN_APPLY=1,               /* Public. */
      DB_TXN_BACKWARD_ALLOC=2,      /* Internal. */
      DB_TXN_BACKWARD_ROLL=3,       /* Public. */
      DB_TXN_FORWARD_ROLL=4,        /* Public. */
      DB_TXN_OPENFILES=5,           /* Internal. */
      DB_TXN_POPENFILES=6,          /* Internal. */
      DB_TXN_PRINT=7                /* Public. */
} db_recops;

/*
 * BACKWARD_ALLOC is used during the forward pass to pick up any aborted
 * allocations for files that were created during the forward pass.
 * The main difference between _ALLOC and _ROLL is that the entry for
 * the file not exist during the rollforward pass.
 */
#define     DB_UNDO(op) ((op) == DB_TXN_ABORT ||                  \
            (op) == DB_TXN_BACKWARD_ROLL || (op) == DB_TXN_BACKWARD_ALLOC)
#define     DB_REDO(op) ((op) == DB_TXN_FORWARD_ROLL || (op) == DB_TXN_APPLY)

struct __db_txn {
      DB_TXNMGR   *mgrp;            /* Pointer to transaction manager. */
      DB_TXN            *parent;    /* Pointer to transaction's parent. */
      DB_LSN            last_lsn;   /* Lsn of last log write. */
      u_int32_t   txnid;            /* Unique transaction id. */
      u_int32_t   tid;        /* Thread id for use in MT XA. */
      roff_t            off;        /* Detail structure within region. */
      db_timeout_t      lock_timeout;     /* Timeout for locks for this txn. */
      db_timeout_t      expire;           /* Time this txn expires. */
      void        *txn_list;  /* Undo information for parent. */

      /*
       * !!!
       * Explicit representations of structures from queue.h.
       * TAILQ_ENTRY(__db_txn) links;
       * TAILQ_ENTRY(__db_txn) xalinks;
       */
      struct {
            struct __db_txn *tqe_next;
            struct __db_txn **tqe_prev;
      } links;                /* Links transactions off manager. */
      struct {
            struct __db_txn *tqe_next;
            struct __db_txn **tqe_prev;
      } xalinks;              /* Links active XA transactions. */

      /*
       * !!!
       * Explicit representations of structures from queue.h.
       * TAILQ_HEAD(__events, __txn_event) events;
       */
      struct {
            struct __txn_event *tqh_first;
            struct __txn_event **tqh_last;
      } events;

      /*
       * !!!
       * Explicit representations of structures from queue.h.
       * STAILQ_HEAD(__logrec, __txn_logrec) logs;
       */
      struct {
            struct __txn_logrec *stqh_first;
            struct __txn_logrec **stqh_last;
      } logs;                       /* Links deferred events. */

      /*
       * !!!
       * Explicit representations of structures from queue.h.
       * TAILQ_HEAD(__kids, __db_txn) kids;
       */
      struct __kids {
            struct __db_txn *tqh_first;
            struct __db_txn **tqh_last;
      } kids;

      /*
       * !!!
       * Explicit representations of structures from queue.h.
       * TAILQ_ENTRY(__db_txn) klinks;
       */
      struct {
            struct __db_txn *tqe_next;
            struct __db_txn **tqe_prev;
      } klinks;

      void  *api_internal;          /* C++ API private. */
      void  *xml_internal;          /* XML API private. */

      u_int32_t   cursors;    /* Number of cursors open for txn */

                              /* Methods. */
      int     (*abort) __P((DB_TXN *));
      int     (*commit) __P((DB_TXN *, u_int32_t));
      int     (*discard) __P((DB_TXN *, u_int32_t));
      u_int32_t (*id) __P((DB_TXN *));
      int     (*prepare) __P((DB_TXN *, u_int8_t *));
      void    (*set_begin_lsnp) __P((DB_TXN *txn, DB_LSN **));
      int     (*set_timeout) __P((DB_TXN *, db_timeout_t, u_int32_t));

#define     TXN_CHILDCOMMIT   0x001       /* Transaction that has committed. */
#define     TXN_COMPENSATE    0x002       /* Compensating transaction. */
#define     TXN_DEADLOCK      0x004       /* Transaction has deadlocked. */
#define     TXN_DEGREE_2      0x008       /* Has degree 2 isolation. */
#define     TXN_DIRTY_READ    0x010       /* Transaction does dirty reads. */
#define     TXN_LOCKTIMEOUT   0x020       /* Transaction has a lock timeout. */
#define     TXN_MALLOC  0x040       /* Structure allocated by TXN system. */
#define     TXN_NOSYNC  0x080       /* Do not sync on prepare and commit. */
#define     TXN_NOWAIT  0x100       /* Do not wait on locks. */
#define     TXN_RESTORED      0x200       /* Transaction has been restored. */
#define     TXN_SYNC    0x400       /* Sync on prepare and commit. */
      u_int32_t   flags;
};

/*
 * Structure used for two phase commit interface.  Berkeley DB support for two
 * phase commit is compatible with the X/open XA interface.
 *
 * The XA #define XIDDATASIZE defines the size of a global transaction ID.  We
 * have our own version here (for name space reasons) which must have the same
 * value.
 */
#define     DB_XIDDATASIZE    128
struct __db_preplist {
      DB_TXN      *txn;
      u_int8_t gid[DB_XIDDATASIZE];
};

/* Transaction statistics structure. */
struct __db_txn_active {
      u_int32_t txnid;        /* Transaction ID */
      u_int32_t parentid;           /* Transaction ID of parent */
      DB_LSN        lsn;                  /* LSN when transaction began */
      u_int32_t xa_status;          /* XA status */
      u_int8_t  xid[DB_XIDDATASIZE];      /* XA global transaction ID */
};

struct __db_txn_stat {
      DB_LSN        st_last_ckp;          /* lsn of the last checkpoint */
      time_t        st_time_ckp;          /* time of last checkpoint */
      u_int32_t st_last_txnid;      /* last transaction id given out */
      u_int32_t st_maxtxns;         /* maximum txns possible */
      u_int32_t st_naborts;         /* number of aborted transactions */
      u_int32_t st_nbegins;         /* number of begun transactions */
      u_int32_t st_ncommits;        /* number of committed transactions */
      u_int32_t st_nactive;         /* number of active transactions */
      u_int32_t st_nrestores;       /* number of restored transactions
                                 after recovery. */
      u_int32_t st_maxnactive;      /* maximum active transactions */
      DB_TXN_ACTIVE *st_txnarray;   /* array of active transactions */
      u_int32_t st_region_wait;     /* Region lock granted after wait. */
      u_int32_t st_region_nowait;   /* Region lock granted without wait. */
      roff_t        st_regsize;           /* Region size. */
};

/*******************************************************
 * Replication.
 *******************************************************/
/* Special, out-of-band environment IDs. */
#define     DB_EID_BROADCAST  -1
#define     DB_EID_INVALID          -2

/* rep_start flags values */
#define     DB_REP_CLIENT           0x001
#define     DB_REP_MASTER           0x002

/* Replication statistics. */
struct __db_rep_stat {
      /* !!!
       * Many replication statistics fields cannot be protected by a mutex
       * without an unacceptable performance penalty, since most message
       * processing is done without the need to hold a region-wide lock.
       * Fields whose comments end with a '+' may be updated without holding
       * the replication or log mutexes (as appropriate), and thus may be
       * off somewhat (or, on unreasonable architectures under unlucky
       * circumstances, garbaged).
       */
      u_int32_t st_status;          /* Current replication status. */
      DB_LSN st_next_lsn;           /* Next LSN to use or expect. */
      DB_LSN st_waiting_lsn;        /* LSN we're awaiting, if any. */
      db_pgno_t st_next_pg;         /* Next pg we expect. */
      db_pgno_t st_waiting_pg;      /* pg we're awaiting, if any. */

      u_int32_t st_dupmasters;      /* # of times a duplicate master
                                 condition was detected.+ */
      int st_env_id;                /* Current environment ID. */
      int st_env_priority;          /* Current environment priority. */
      u_int32_t st_gen;       /* Current generation number. */
      u_int32_t st_egen;            /* Current election gen number. */
      u_int32_t st_log_duplicated;  /* Log records received multiply.+ */
      u_int32_t st_log_queued;      /* Log records currently queued.+ */
      u_int32_t st_log_queued_max;  /* Max. log records queued at once.+ */
      u_int32_t st_log_queued_total;      /* Total # of log recs. ever queued.+ */
      u_int32_t st_log_records;     /* Log records received and put.+ */
      u_int32_t st_log_requested;   /* Log recs. missed and requested.+ */
      int st_master;                /* Env. ID of the current master. */
      u_int32_t st_master_changes;  /* # of times we've switched masters. */
      u_int32_t st_msgs_badgen;     /* Messages with a bad generation #.+ */
      u_int32_t st_msgs_processed;  /* Messages received and processed.+ */
      u_int32_t st_msgs_recover;    /* Messages ignored because this site
                                 was a client in recovery.+ */
      u_int32_t st_msgs_send_failures;/* # of failed message sends.+ */
      u_int32_t st_msgs_sent;       /* # of successful message sends.+ */
      u_int32_t st_newsites;        /* # of NEWSITE msgs. received.+ */
      int st_nsites;                /* Current number of sites we will
                                 assume during elections. */
      u_int32_t st_nthrottles;      /* # of times we were throttled. */
      u_int32_t st_outdated;        /* # of times we detected and returned
                                 an OUTDATED condition.+ */
      u_int32_t st_pg_duplicated;   /* Pages received multiply.+ */
      u_int32_t st_pg_records;      /* Pages received and stored.+ */
      u_int32_t st_pg_requested;    /* Pages missed and requested.+ */
      u_int32_t st_startup_complete;      /* Site completed client sync-up. */
      u_int32_t st_txns_applied;    /* # of transactions applied.+ */

      /* Elections generally. */
      u_int32_t st_elections;       /* # of elections held.+ */
      u_int32_t st_elections_won;   /* # of elections won by this site.+ */

      /* Statistics about an in-progress election. */
      int st_election_cur_winner;   /* Current front-runner. */
      u_int32_t st_election_gen;    /* Election generation number. */
      DB_LSN st_election_lsn;       /* Max. LSN of current winner. */
      int st_election_nsites;       /* # of "registered voters". */
      int st_election_nvotes;       /* # of "registered voters" needed. */
      int st_election_priority;     /* Current election priority. */
      int st_election_status;       /* Current election status. */
      u_int32_t st_election_tiebreaker;/* Election tiebreaker value. */
      int st_election_votes;        /* Votes received in this round. */
};
/*
 * The storage record for a sequence.
 */
struct __db_seq_record {
      u_int32_t   seq_version;      /* Version size/number. */
#define     DB_SEQ_DEC        0x00000001  /* Decrement sequence. */
#define     DB_SEQ_INC        0x00000002  /* Increment sequence. */
#define     DB_SEQ_RANGE_SET  0x00000004  /* Range set (internal). */
#define     DB_SEQ_WRAP       0x00000008  /* Wrap sequence at min/max. */
      u_int32_t   flags;            /* Flags. */
      db_seq_t    seq_value;  /* Current value. */
      db_seq_t    seq_max;    /* Max permitted. */
      db_seq_t    seq_min;    /* Min permitted. */
};

/*
 * Handle for a sequence object.
 */
struct __db_sequence {
      DB          *seq_dbp;   /* DB handle for this sequence. */
      DB_MUTEX    *seq_mutexp;      /* Mutex if sequence is threaded. */
      DB_SEQ_RECORD     *seq_rp;    /* Pointer to current data. */
      DB_SEQ_RECORD     seq_record; /* Data from DB_SEQUENCE. */
      int32_t           seq_cache_size; /* Number of values cached. */
      db_seq_t    seq_last_value;   /* Last value cached. */
      DBT         seq_key;    /* DBT pointing to sequence key. */
      DBT         seq_data;   /* DBT pointing to seq_record. */

      /* API-private structure: used by C++ and Java. */
      void        *api_internal;

      int         (*close) __P((DB_SEQUENCE *, u_int32_t));
      int         (*get) __P((DB_SEQUENCE *,
                        DB_TXN *, int32_t, db_seq_t *, u_int32_t));
      int         (*get_cachesize) __P((DB_SEQUENCE *, int32_t *));
      int         (*get_db) __P((DB_SEQUENCE *, DB **));
      int         (*get_flags) __P((DB_SEQUENCE *, u_int32_t *));
      int         (*get_key) __P((DB_SEQUENCE *, DBT *));
      int         (*get_range) __P((DB_SEQUENCE *,
                       db_seq_t *, db_seq_t *));
      int         (*initial_value) __P((DB_SEQUENCE *, db_seq_t));
      int         (*open) __P((DB_SEQUENCE *,
                      DB_TXN *, DBT *, u_int32_t));
      int         (*remove) __P((DB_SEQUENCE *, DB_TXN *, u_int32_t));
      int         (*set_cachesize) __P((DB_SEQUENCE *, int32_t));
      int         (*set_flags) __P((DB_SEQUENCE *, u_int32_t));
      int         (*set_range) __P((DB_SEQUENCE *, db_seq_t, db_seq_t));
      int         (*stat) __P((DB_SEQUENCE *,
                      DB_SEQUENCE_STAT **, u_int32_t));
      int         (*stat_print) __P((DB_SEQUENCE *, u_int32_t));
};

struct __db_seq_stat {
      u_int32_t st_wait;        /* Sequence lock granted without wait. */
      u_int32_t st_nowait;      /* Sequence lock granted after wait. */
      db_seq_t  st_current;     /* Current value in db. */
      db_seq_t  st_value;       /* Current cached value. */
      db_seq_t  st_last_value;  /* Last cached value. */
      db_seq_t  st_min;   /* Minimum value. */
      db_seq_t  st_max;   /* Maximum value. */
      int32_t   st_cache_size;  /* Cache size. */
      u_int32_t st_flags;       /* Flag value. */
};

/*******************************************************
 * Access methods.
 *******************************************************/
typedef enum {
      DB_BTREE=1,
      DB_HASH=2,
      DB_RECNO=3,
      DB_QUEUE=4,
      DB_UNKNOWN=5                  /* Figure it out on open. */
} DBTYPE;

#define     DB_RENAMEMAGIC    0x030800    /* File has been renamed. */

#define     DB_BTREEVERSION   9           /* Current btree version. */
#define     DB_BTREEOLDVER    8           /* Oldest btree version supported. */
#define     DB_BTREEMAGIC     0x053162

#define     DB_HASHVERSION    8           /* Current hash version. */
#define     DB_HASHOLDVER     7           /* Oldest hash version supported. */
#define     DB_HASHMAGIC      0x061561

#define     DB_QAMVERSION     4           /* Current queue version. */
#define     DB_QAMOLDVER      3           /* Oldest queue version supported. */
#define     DB_QAMMAGIC 0x042253

#define     DB_SEQUENCE_VERSION 1         /* Current sequence version. */

/*
 * DB access method and cursor operation values.  Each value is an operation
 * code to which additional bit flags are added.
 */
#define     DB_AFTER           1    /* c_put() */
#define     DB_APPEND          2    /* put() */
#define     DB_BEFORE          3    /* c_put() */
#define     DB_CACHED_COUNTS   4    /* stat() */
#define     DB_CONSUME         5    /* get() */
#define     DB_CONSUME_WAIT          6    /* get() */
#define     DB_CURRENT         7    /* c_get(), c_put(), DB_LOGC->get() */
#define     DB_FAST_STAT             8    /* stat() */
#define     DB_FIRST           9    /* c_get(), DB_LOGC->get() */
#define     DB_GET_BOTH       10    /* get(), c_get() */
#define     DB_GET_BOTHC            11    /* c_get() (internal) */
#define     DB_GET_BOTH_RANGE 12    /* get(), c_get() */
#define     DB_GET_RECNO            13    /* c_get() */
#define     DB_JOIN_ITEM            14    /* c_get(); do not do primary lookup */
#define     DB_KEYFIRST       15    /* c_put() */
#define     DB_KEYLAST        16    /* c_put() */
#define     DB_LAST                 17    /* c_get(), DB_LOGC->get() */
#define     DB_NEXT                 18    /* c_get(), DB_LOGC->get() */
#define     DB_NEXT_DUP       19    /* c_get() */
#define     DB_NEXT_NODUP           20    /* c_get() */
#define     DB_NODUPDATA            21    /* put(), c_put() */
#define     DB_NOOVERWRITE          22    /* put() */
#define     DB_NOSYNC         23    /* close() */
#define     DB_POSITION       24    /* c_dup() */
#define     DB_PREV                 25    /* c_get(), DB_LOGC->get() */
#define     DB_PREV_NODUP           26    /* c_get(), DB_LOGC->get() */
#define     DB_RECORDCOUNT          27    /* stat() */
#define     DB_SET                  28    /* c_get(), DB_LOGC->get() */
#define     DB_SET_LOCK_TIMEOUT     29    /* set_timout() */
#define     DB_SET_RANGE            30    /* c_get() */
#define     DB_SET_RECNO            31    /* get(), c_get() */
#define     DB_SET_TXN_NOW          32    /* set_timout() (internal) */
#define     DB_SET_TXN_TIMEOUT      33    /* set_timout() */
#define     DB_UPDATE_SECONDARY     34    /* c_get(), c_del() (internal) */
#define     DB_WRITECURSOR          35    /* cursor() */
#define     DB_WRITELOCK            36    /* cursor() (internal) */

/* This has to change when the max opcode hits 255. */
#define     DB_OPFLAGS_MASK   0x000000ff  /* Mask for operations flags. */

/*
 * Masks for flags that can be OR'd into DB access method and cursor
 * operation values.
 *
 *    DB_DIRTY_READ     0x04000000     Dirty Read. */
#define     DB_MULTIPLE 0x08000000  /* Return multiple data values. */
#define     DB_MULTIPLE_KEY   0x10000000  /* Return multiple data/key pairs. */
#define     DB_RMW            0x20000000  /* Acquire write flag immediately. */

/*
 * DB (user visible) error return codes.
 *
 * !!!
 * For source compatibility with DB 2.X deadlock return (EAGAIN), use the
 * following:
 *    #include <errno.h>
 *    #define DB_LOCK_DEADLOCK EAGAIN
 *
 * !!!
 * We don't want our error returns to conflict with other packages where
 * possible, so pick a base error value that's hopefully not common.  We
 * document that we own the error name space from -30,800 to -30,999.
 */
/* DB (public) error return codes. */
#define     DB_BUFFER_SMALL         (-30999)/* User memory too small for return. */
#define     DB_DONOTINDEX           (-30998)/* "Null" return from 2ndary callbk. */
#define     DB_KEYEMPTY       (-30997)/* Key/data deleted or never created. */
#define     DB_KEYEXIST       (-30996)/* The key/data pair already exists. */
#define     DB_LOCK_DEADLOCK  (-30995)/* Deadlock. */
#define     DB_LOCK_NOTGRANTED      (-30994)/* Lock unavailable. */
#define     DB_LOG_BUFFER_FULL      (-30993)/* In-memory log buffer full. */
#define     DB_NOSERVER       (-30992)/* Server panic return. */
#define     DB_NOSERVER_HOME  (-30991)/* Bad home sent to server. */
#define     DB_NOSERVER_ID          (-30990)/* Bad ID sent to server. */
#define     DB_NOTFOUND       (-30989)/* Key/data pair not found (EOF). */
#define     DB_OLD_VERSION          (-30988)/* Out-of-date version. */
#define     DB_PAGE_NOTFOUND  (-30987)/* Requested page not found. */
#define     DB_REP_DUPMASTER  (-30986)/* There are two masters. */
#define     DB_REP_HANDLE_DEAD      (-30985)/* Rolled back a commit. */
#define     DB_REP_HOLDELECTION     (-30984)/* Time to hold an election. */
#define     DB_REP_ISPERM           (-30983)/* Cached not written perm written.*/
#define     DB_REP_NEWMASTER  (-30982)/* We have learned of a new master. */
#define     DB_REP_NEWSITE          (-30981)/* New site entered system. */
#define     DB_REP_NOTPERM          (-30980)/* Permanent log record not written. */
#define     DB_REP_STARTUPDONE      (-30979)/* Client startup complete. */
#define     DB_REP_UNAVAIL          (-30978)/* Site cannot currently be reached. */
#define     DB_RUNRECOVERY          (-30977)/* Panic return. */
#define     DB_SECONDARY_BAD  (-30976)/* Secondary index corrupt. */
#define     DB_VERIFY_BAD           (-30975)/* Verify failed; bad format. */
#define     DB_VERSION_MISMATCH     (-30974)/* Environment version mismatch. */

/* DB (private) error return codes. */
#define     DB_ALREADY_ABORTED      (-30899)
#define     DB_DELETED        (-30898)/* Recovery file marked deleted. */
#define     DB_LOCK_NOTEXIST  (-30897)/* Object to lock is gone. */
#define     DB_NEEDSPLIT            (-30896)/* Page needs to be split. */
#define     DB_REP_EGENCHG          (-30895)/* Egen changed while in election. */
#define     DB_REP_LOGREADY         (-30894)/* Rep log ready for recovery. */
#define     DB_REP_PAGEDONE         (-30893)/* This page was already done. */
#define     DB_SURPRISE_KID         (-30892)/* Child commit where parent
                                 didn't know it was a parent. */
#define     DB_SWAPBYTES            (-30891)/* Database needs byte swapping. */
#define     DB_TIMEOUT        (-30890)/* Timed out waiting for election. */
#define     DB_TXN_CKP        (-30889)/* Encountered ckp record in log. */
#define     DB_VERIFY_FATAL         (-30888)/* DB->verify cannot proceed. */

/* Database handle. */
struct __db {
      /*******************************************************
       * Public: owned by the application.
       *******************************************************/
      u_int32_t pgsize;       /* Database logical page size. */

                              /* Callbacks. */
      int (*db_append_recno) __P((DB *, DBT *, db_recno_t));
      void (*db_feedback) __P((DB *, int, int));
      int (*dup_compare) __P((DB *, const DBT *, const DBT *));

      void  *app_private;           /* Application-private handle. */

      /*******************************************************
       * Private: owned by DB.
       *******************************************************/
      DB_ENV      *dbenv;                 /* Backing environment. */

      DBTYPE       type;                  /* DB access method type. */

      DB_MPOOLFILE *mpf;            /* Backing buffer pool. */

      DB_MUTEX *mutexp;       /* Synchronization for free threading */

      char *fname, *dname;          /* File/database passed to DB->open. */
      u_int32_t open_flags;         /* Flags passed to DB->open. */

      u_int8_t fileid[DB_FILE_ID_LEN];/* File's unique ID for locking. */

      u_int32_t adj_fileid;         /* File's unique ID for curs. adj. */

#define     DB_LOGFILEID_INVALID    -1
      FNAME *log_filename;          /* File's naming info for logging. */

      db_pgno_t meta_pgno;          /* Meta page number */
      u_int32_t lid;                /* Locker id for handle locking. */
      u_int32_t cur_lid;            /* Current handle lock holder. */
      u_int32_t associate_lid;      /* Locker id for DB->associate call. */
      DB_LOCK     handle_lock;            /* Lock held on this handle. */

      u_int  cl_id;                 /* RPC: remote client id. */

      time_t       timestamp;       /* Handle timestamp for replication. */

      /*
       * Returned data memory for DB->get() and friends.
       */
      DBT    my_rskey;        /* Secondary key. */
      DBT    my_rkey;         /* [Primary] key. */
      DBT    my_rdata;        /* Data. */

      /*
       * !!!
       * Some applications use DB but implement their own locking outside of
       * DB.  If they're using fcntl(2) locking on the underlying database
       * file, and we open and close a file descriptor for that file, we will
       * discard their locks.  The DB_FCNTL_LOCKING flag to DB->open is an
       * undocumented interface to support this usage which leaves any file
       * descriptors we open until DB->close.  This will only work with the
       * DB->open interface and simple caches, e.g., creating a transaction
       * thread may open/close file descriptors this flag doesn't protect.
       * Locking with fcntl(2) on a file that you don't own is a very, very
       * unsafe thing to do.  'Nuff said.
       */
      DB_FH *saved_open_fhp;  /* Saved file handle. */

      /*
       * Linked list of DBP's, linked from the DB_ENV, used to keep track
       * of all open db handles for cursor adjustment.
       *
       * !!!
       * Explicit representations of structures from queue.h.
       * LIST_ENTRY(__db) dblistlinks;
       */
      struct {
            struct __db *le_next;
            struct __db **le_prev;
      } dblistlinks;

      /*
       * Cursor queues.
       *
       * !!!
       * Explicit representations of structures from queue.h.
       * TAILQ_HEAD(__cq_fq, __dbc) free_queue;
       * TAILQ_HEAD(__cq_aq, __dbc) active_queue;
       * TAILQ_HEAD(__cq_jq, __dbc) join_queue;
       */
      struct __cq_fq {
            struct __dbc *tqh_first;
            struct __dbc **tqh_last;
      } free_queue;
      struct __cq_aq {
            struct __dbc *tqh_first;
            struct __dbc **tqh_last;
      } active_queue;
      struct __cq_jq {
            struct __dbc *tqh_first;
            struct __dbc **tqh_last;
      } join_queue;

      /*
       * Secondary index support.
       *
       * Linked list of secondary indices -- set in the primary.
       *
       * !!!
       * Explicit representations of structures from queue.h.
       * LIST_HEAD(s_secondaries, __db);
       */
      struct {
            struct __db *lh_first;
      } s_secondaries;

      /*
       * List entries for secondaries, and reference count of how
       * many threads are updating this secondary (see __db_c_put).
       *
       * !!!
       * Note that these are synchronized by the primary's mutex, but
       * filled in in the secondaries.
       *
       * !!!
       * Explicit representations of structures from queue.h.
       * LIST_ENTRY(__db) s_links;
       */
      struct {
            struct __db *le_next;
            struct __db **le_prev;
      } s_links;
      u_int32_t s_refcnt;

      /* Secondary callback and free functions -- set in the secondary. */
      int   (*s_callback) __P((DB *, const DBT *, const DBT *, DBT *));

      /* Reference to primary -- set in the secondary. */
      DB    *s_primary;

      /* API-private structure: used by DB 1.85, C++, Java, Perl and Tcl */
      void  *api_internal;

      /* Subsystem-private structure. */
      void  *bt_internal;           /* Btree/Recno access method. */
      void  *h_internal;            /* Hash access method. */
      void  *q_internal;            /* Queue access method. */
      void  *xa_internal;           /* XA. */

                              /* Methods. */
      int  (*associate) __P((DB *, DB_TXN *, DB *, int (*)(DB *, const DBT *,
            const DBT *, DBT *), u_int32_t));
      int  (*close) __P((DB *, u_int32_t));
      int  (*cursor) __P((DB *, DB_TXN *, DBC **, u_int32_t));
      int  (*del) __P((DB *, DB_TXN *, DBT *, u_int32_t));
      int  (*dump) __P((DB *,
            const char *, int (*)(void *, const void *), void *, int, int));
      void (*err) __P((DB *, int, const char *, ...));
      void (*errx) __P((DB *, const char *, ...));
      int  (*fd) __P((DB *, int *));
      int  (*get) __P((DB *, DB_TXN *, DBT *, DBT *, u_int32_t));
      int  (*pget) __P((DB *, DB_TXN *, DBT *, DBT *, DBT *, u_int32_t));
      int  (*get_byteswapped) __P((DB *, int *));
      int  (*get_cachesize) __P((DB *, u_int32_t *, u_int32_t *, int *));
      int  (*get_dbname) __P((DB *, const char **, const char **));
      int  (*get_encrypt_flags) __P((DB *, u_int32_t *));
      DB_ENV *(*get_env) __P((DB *));
      void (*get_errfile) __P((DB *, FILE **));
      void (*get_errpfx) __P((DB *, const char **));
      int  (*get_flags) __P((DB *, u_int32_t *));
      int  (*get_lorder) __P((DB *, int *));
      int  (*get_open_flags) __P((DB *, u_int32_t *));
      int  (*get_pagesize) __P((DB *, u_int32_t *));
      int  (*get_transactional) __P((DB *));
      int  (*get_type) __P((DB *, DBTYPE *));
      int  (*join) __P((DB *, DBC **, DBC **, u_int32_t));
      int  (*key_range) __P((DB *,
            DB_TXN *, DBT *, DB_KEY_RANGE *, u_int32_t));
      int  (*open) __P((DB *, DB_TXN *,
            const char *, const char *, DBTYPE, u_int32_t, int));
      int  (*put) __P((DB *, DB_TXN *, DBT *, DBT *, u_int32_t));
      int  (*remove) __P((DB *, const char *, const char *, u_int32_t));
      int  (*rename) __P((DB *,
          const char *, const char *, const char *, u_int32_t));
      int  (*truncate) __P((DB *, DB_TXN *, u_int32_t *, u_int32_t));
      int  (*set_append_recno) __P((DB *, int (*)(DB *, DBT *, db_recno_t)));
      int  (*set_alloc) __P((DB *, void *(*)(size_t),
            void *(*)(void *, size_t), void (*)(void *)));
      int  (*set_cachesize) __P((DB *, u_int32_t, u_int32_t, int));
      int  (*set_dup_compare) __P((DB *,
          int (*)(DB *, const DBT *, const DBT *)));
      int  (*set_encrypt) __P((DB *, const char *, u_int32_t));
      void (*set_errcall) __P((DB *,
          void (*)(const DB_ENV *, const char *, const char *)));
      void (*set_errfile) __P((DB *, FILE *));
      void (*set_errpfx) __P((DB *, const char *));
      int  (*set_feedback) __P((DB *, void (*)(DB *, int, int)));
      int  (*set_flags) __P((DB *, u_int32_t));
      int  (*set_lorder) __P((DB *, int));
      void (*set_msgcall) __P((DB *, void (*)(const DB_ENV *, const char *)));
      void (*get_msgfile) __P((DB *, FILE **));
      void (*set_msgfile) __P((DB *, FILE *));
      int  (*set_pagesize) __P((DB *, u_int32_t));
      int  (*set_paniccall) __P((DB *, void (*)(DB_ENV *, int)));
      int  (*stat) __P((DB *, DB_TXN *, void *, u_int32_t));
      int  (*stat_print) __P((DB *, u_int32_t));
      int  (*sync) __P((DB *, u_int32_t));
      int  (*upgrade) __P((DB *, const char *, u_int32_t));
      int  (*verify) __P((DB *,
          const char *, const char *, FILE *, u_int32_t));

      int  (*get_bt_minkey) __P((DB *, u_int32_t *));
      int  (*set_bt_compare) __P((DB *,
          int (*)(DB *, const DBT *, const DBT *)));
      int  (*set_bt_maxkey) __P((DB *, u_int32_t));
      int  (*set_bt_minkey) __P((DB *, u_int32_t));
      int  (*set_bt_prefix) __P((DB *,
          size_t (*)(DB *, const DBT *, const DBT *)));

      int  (*get_h_ffactor) __P((DB *, u_int32_t *));
      int  (*get_h_nelem) __P((DB *, u_int32_t *));
      int  (*set_h_ffactor) __P((DB *, u_int32_t));
      int  (*set_h_hash) __P((DB *,
          u_int32_t (*)(DB *, const void *, u_int32_t)));
      int  (*set_h_nelem) __P((DB *, u_int32_t));

      int  (*get_re_delim) __P((DB *, int *));
      int  (*get_re_len) __P((DB *, u_int32_t *));
      int  (*get_re_pad) __P((DB *, int *));
      int  (*get_re_source) __P((DB *, const char **));
      int  (*set_re_delim) __P((DB *, int));
      int  (*set_re_len) __P((DB *, u_int32_t));
      int  (*set_re_pad) __P((DB *, int));
      int  (*set_re_source) __P((DB *, const char *));

      int  (*get_q_extentsize) __P((DB *, u_int32_t *));
      int  (*set_q_extentsize) __P((DB *, u_int32_t));

      int  (*db_am_remove) __P((DB *, DB_TXN *, const char *, const char *));
      int  (*db_am_rename) __P((DB *, DB_TXN *,
          const char *, const char *, const char *));

      /*
       * Never called; these are a place to save function pointers
       * so that we can undo an associate.
       */
      int  (*stored_get) __P((DB *, DB_TXN *, DBT *, DBT *, u_int32_t));
      int  (*stored_close) __P((DB *, u_int32_t));

#define     DB_OK_BTREE 0x01
#define     DB_OK_HASH  0x02
#define     DB_OK_QUEUE 0x04
#define     DB_OK_RECNO 0x08
      u_int32_t   am_ok;            /* Legal AM choices. */

#define     DB_AM_CHKSUM            0x00000001 /* Checksumming. */
#define     DB_AM_CL_WRITER         0x00000002 /* Allow writes in client replica. */
#define     DB_AM_COMPENSATE  0x00000004 /* Created by compensating txn. */
#define     DB_AM_CREATED           0x00000008 /* Database was created upon open. */
#define     DB_AM_CREATED_MSTR      0x00000010 /* Encompassing file was created. */
#define     DB_AM_DBM_ERROR         0x00000020 /* Error in DBM/NDBM database. */
#define     DB_AM_DELIMITER         0x00000040 /* Variable length delimiter set. */
#define     DB_AM_DIRTY       0x00000080 /* Support Dirty Reads. */
#define     DB_AM_DISCARD           0x00000100 /* Discard any cached pages. */
#define     DB_AM_DUP         0x00000200 /* DB_DUP. */
#define     DB_AM_DUPSORT           0x00000400 /* DB_DUPSORT. */
#define     DB_AM_ENCRYPT           0x00000800 /* Encryption. */
#define     DB_AM_FIXEDLEN          0x00001000 /* Fixed-length records. */
#define     DB_AM_INMEM       0x00002000 /* In-memory; no sync on close. */
#define     DB_AM_INORDER           0x00004000 /* DB_INORDER. */
#define     DB_AM_IN_RENAME         0x00008000 /* File is being renamed. */
#define     DB_AM_NOT_DURABLE 0x00010000 /* Do not log changes. */
#define     DB_AM_OPEN_CALLED 0x00020000 /* DB->open called. */
#define     DB_AM_PAD         0x00040000 /* Fixed-length record pad. */
#define     DB_AM_PGDEF       0x00080000 /* Page size was defaulted. */
#define     DB_AM_RDONLY            0x00100000 /* Database is readonly. */
#define     DB_AM_RECNUM            0x00200000 /* DB_RECNUM. */
#define     DB_AM_RECOVER           0x00400000 /* DB opened by recovery routine. */
#define     DB_AM_RENUMBER          0x00800000 /* DB_RENUMBER. */
#define     DB_AM_REPLICATION 0x01000000 /* An internal replication file. */
#define     DB_AM_REVSPLITOFF 0x02000000 /* DB_REVSPLITOFF. */
#define     DB_AM_SECONDARY         0x04000000 /* Database is a secondary index. */
#define     DB_AM_SNAPSHOT          0x08000000 /* DB_SNAPSHOT. */
#define     DB_AM_SUBDB       0x10000000 /* Subdatabases supported. */
#define     DB_AM_SWAP        0x20000000 /* Pages need to be byte-swapped. */
#define     DB_AM_TXN         0x40000000 /* Opened in a transaction. */
#define     DB_AM_VERIFYING         0x80000000 /* DB handle is in the verifier. */
      u_int32_t orig_flags;            /* Flags at  open, for refresh. */
      u_int32_t flags;
};

/*
 * Macros for bulk get.  These are only intended for the C API.
 * For C++, use DbMultiple*Iterator.
 */
#define     DB_MULTIPLE_INIT(pointer, dbt)                              \
      (pointer = (u_int8_t *)(dbt)->data +                        \
          (dbt)->ulen - sizeof(u_int32_t))
#define     DB_MULTIPLE_NEXT(pointer, dbt, retdata, retdlen)            \
      do {                                            \
            if (*((u_int32_t *)(pointer)) == (u_int32_t)-1) {     \
                  retdata = NULL;                           \
                  pointer = NULL;                           \
                  break;                                    \
            }                                         \
            retdata = (u_int8_t *)                          \
                (dbt)->data + *(u_int32_t *)(pointer);            \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
            retdlen = *(u_int32_t *)(pointer);              \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
            if (retdlen == 0 &&                             \
                retdata == (u_int8_t *)(dbt)->data)               \
                  retdata = NULL;                           \
      } while (0)
#define     DB_MULTIPLE_KEY_NEXT(pointer, dbt, retkey, retklen, retdata, retdlen) \
      do {                                            \
            if (*((u_int32_t *)(pointer)) == (u_int32_t)-1) {     \
                  retdata = NULL;                           \
                  retkey = NULL;                            \
                  pointer = NULL;                           \
                  break;                                    \
            }                                         \
            retkey = (u_int8_t *)                           \
                (dbt)->data + *(u_int32_t *)(pointer);            \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
            retklen = *(u_int32_t *)(pointer);              \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
            retdata = (u_int8_t *)                          \
                (dbt)->data + *(u_int32_t *)(pointer);            \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
            retdlen = *(u_int32_t *)(pointer);              \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
      } while (0)

#define     DB_MULTIPLE_RECNO_NEXT(pointer, dbt, recno, retdata, retdlen)   \
      do {                                            \
            if (*((u_int32_t *)(pointer)) == (u_int32_t)0) {      \
                  recno = 0;                          \
                  retdata = NULL;                           \
                  pointer = NULL;                           \
                  break;                                    \
            }                                         \
            recno = *(u_int32_t *)(pointer);                \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
            retdata = (u_int8_t *)                          \
                (dbt)->data + *(u_int32_t *)(pointer);            \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
            retdlen = *(u_int32_t *)(pointer);              \
            (pointer) = (u_int32_t *)(pointer) - 1;               \
      } while (0)

/*******************************************************
 * Access method cursors.
 *******************************************************/
struct __dbc {
      DB *dbp;                /* Related DB access method. */
      DB_TXN       *txn;                  /* Associated transaction. */

      /*
       * Active/free cursor queues.
       *
       * !!!
       * Explicit representations of structures from queue.h.
       * TAILQ_ENTRY(__dbc) links;
       */
      struct {
            DBC *tqe_next;
            DBC **tqe_prev;
      } links;

      /*
       * The DBT *'s below are used by the cursor routines to return
       * data to the user when DBT flags indicate that DB should manage
       * the returned memory.  They point at a DBT containing the buffer
       * and length that will be used, and "belonging" to the handle that
       * should "own" this memory.  This may be a "my_*" field of this
       * cursor--the default--or it may be the corresponding field of
       * another cursor, a DB handle, a join cursor, etc.  In general, it
       * will be whatever handle the user originally used for the current
       * DB interface call.
       */
      DBT    *rskey;          /* Returned secondary key. */
      DBT    *rkey;                 /* Returned [primary] key. */
      DBT    *rdata;          /* Returned data. */

      DBT     my_rskey;       /* Space for returned secondary key. */
      DBT     my_rkey;        /* Space for returned [primary] key. */
      DBT     my_rdata;       /* Space for returned data. */

      u_int32_t lid;                /* Default process' locker id. */
      u_int32_t locker;       /* Locker for this operation. */
      DBT     lock_dbt;       /* DBT referencing lock. */
      DB_LOCK_ILOCK lock;           /* Object to be locked. */
      DB_LOCK       mylock;         /* CDB lock held on this cursor. */

      u_int   cl_id;          /* Remote client id. */

      DBTYPE        dbtype;         /* Cursor type. */

      DBC_INTERNAL *internal;       /* Access method private. */

      int (*c_close) __P((DBC *));  /* Methods: public. */
      int (*c_count) __P((DBC *, db_recno_t *, u_int32_t));
      int (*c_del) __P((DBC *, u_int32_t));
      int (*c_dup) __P((DBC *, DBC **, u_int32_t));
      int (*c_get) __P((DBC *, DBT *, DBT *, u_int32_t));
      int (*c_pget) __P((DBC *, DBT *, DBT *, DBT *, u_int32_t));
      int (*c_put) __P((DBC *, DBT *, DBT *, u_int32_t));

                              /* Methods: private. */
      int (*c_am_bulk) __P((DBC *, DBT *, u_int32_t));
      int (*c_am_close) __P((DBC *, db_pgno_t, int *));
      int (*c_am_del) __P((DBC *));
      int (*c_am_destroy) __P((DBC *));
      int (*c_am_get) __P((DBC *, DBT *, DBT *, u_int32_t, db_pgno_t *));
      int (*c_am_put) __P((DBC *, DBT *, DBT *, u_int32_t, db_pgno_t *));
      int (*c_am_writelock) __P((DBC *));

#define     DBC_ACTIVE   0x0001           /* Cursor in use. */
#define     DBC_COMPENSATE     0x0002           /* Cursor compensating, don't lock. */
#define     DBC_DEGREE_2       0x0004           /* Cursor has degree 2 isolation. */
#define     DBC_DIRTY_READ     0x0008           /* Cursor supports dirty reads. */
#define     DBC_OPD            0x0010           /* Cursor references off-page dups. */
#define     DBC_RECOVER  0x0020           /* Recovery cursor; don't log/lock. */
#define     DBC_RMW            0x0040           /* Acquire write flag in read op. */
#define     DBC_TRANSIENT      0x0080           /* Cursor is transient. */
#define     DBC_WRITECURSOR    0x0100           /* Cursor may be used to write (CDB). */
#define     DBC_WRITER   0x0200           /* Cursor immediately writing (CDB). */
#define     DBC_MULTIPLE       0x0400           /* Return Multiple data. */
#define     DBC_MULTIPLE_KEY 0x0800       /* Return Multiple keys and data. */
#define     DBC_OWN_LID  0x1000           /* Free lock id on destroy. */
      u_int32_t flags;
};

/* Key range statistics structure */
struct __key_range {
      double less;
      double equal;
      double greater;
};

/* Btree/Recno statistics structure. */
struct __db_bt_stat {
      u_int32_t bt_magic;           /* Magic number. */
      u_int32_t bt_version;         /* Version number. */
      u_int32_t bt_metaflags;       /* Metadata flags. */
      u_int32_t bt_nkeys;           /* Number of unique keys. */
      u_int32_t bt_ndata;           /* Number of data items. */
      u_int32_t bt_pagesize;        /* Page size. */
      u_int32_t bt_maxkey;          /* Maxkey value. */
      u_int32_t bt_minkey;          /* Minkey value. */
      u_int32_t bt_re_len;          /* Fixed-length record length. */
      u_int32_t bt_re_pad;          /* Fixed-length record pad. */
      u_int32_t bt_levels;          /* Tree levels. */
      u_int32_t bt_int_pg;          /* Internal pages. */
      u_int32_t bt_leaf_pg;         /* Leaf pages. */
      u_int32_t bt_dup_pg;          /* Duplicate pages. */
      u_int32_t bt_over_pg;         /* Overflow pages. */
      u_int32_t bt_empty_pg;        /* Empty pages. */
      u_int32_t bt_free;            /* Pages on the free list. */
      u_int32_t bt_int_pgfree;      /* Bytes free in internal pages. */
      u_int32_t bt_leaf_pgfree;     /* Bytes free in leaf pages. */
      u_int32_t bt_dup_pgfree;      /* Bytes free in duplicate pages. */
      u_int32_t bt_over_pgfree;     /* Bytes free in overflow pages. */
};

/* Hash statistics structure. */
struct __db_h_stat {
      u_int32_t hash_magic;         /* Magic number. */
      u_int32_t hash_version;       /* Version number. */
      u_int32_t hash_metaflags;     /* Metadata flags. */
      u_int32_t hash_nkeys;         /* Number of unique keys. */
      u_int32_t hash_ndata;         /* Number of data items. */
      u_int32_t hash_pagesize;      /* Page size. */
      u_int32_t hash_ffactor;       /* Fill factor specified at create. */
      u_int32_t hash_buckets;       /* Number of hash buckets. */
      u_int32_t hash_free;          /* Pages on the free list. */
      u_int32_t hash_bfree;         /* Bytes free on bucket pages. */
      u_int32_t hash_bigpages;      /* Number of big key/data pages. */
      u_int32_t hash_big_bfree;     /* Bytes free on big item pages. */
      u_int32_t hash_overflows;     /* Number of overflow pages. */
      u_int32_t hash_ovfl_free;     /* Bytes free on ovfl pages. */
      u_int32_t hash_dup;           /* Number of dup pages. */
      u_int32_t hash_dup_free;      /* Bytes free on duplicate pages. */
};

/* Queue statistics structure. */
struct __db_qam_stat {
      u_int32_t qs_magic;           /* Magic number. */
      u_int32_t qs_version;         /* Version number. */
      u_int32_t qs_metaflags;       /* Metadata flags. */
      u_int32_t qs_nkeys;           /* Number of unique keys. */
      u_int32_t qs_ndata;           /* Number of data items. */
      u_int32_t qs_pagesize;        /* Page size. */
      u_int32_t qs_extentsize;      /* Pages per extent. */
      u_int32_t qs_pages;           /* Data pages. */
      u_int32_t qs_re_len;          /* Fixed-length record length. */
      u_int32_t qs_re_pad;          /* Fixed-length record pad. */
      u_int32_t qs_pgfree;          /* Bytes free in data pages. */
      u_int32_t qs_first_recno;     /* First not deleted record. */
      u_int32_t qs_cur_recno;       /* Next available record number. */
};

/*******************************************************
 * Environment.
 *******************************************************/
#define     DB_REGION_MAGIC   0x120897    /* Environment magic number. */

/* Database Environment handle. */
struct __db_env {
      /*******************************************************
       * Public: owned by the application.
       *******************************************************/
                              /* Error message callback. */
      void (*db_errcall) __P((const DB_ENV *, const char *, const char *));
      FILE        *db_errfile;      /* Error message file stream. */
      const char  *db_errpfx; /* Error message prefix. */

      FILE        *db_msgfile;      /* Statistics message file stream. */
                              /* Statistics message callback. */
      void (*db_msgcall) __P((const DB_ENV *, const char *));

                              /* Other Callbacks. */
      void (*db_feedback) __P((DB_ENV *, int, int));
      void (*db_paniccall) __P((DB_ENV *, int));

                              /* App-specified alloc functions. */
      void *(*db_malloc) __P((size_t));
      void *(*db_realloc) __P((void *, size_t));
      void (*db_free) __P((void *));

      /*
       * Currently, the verbose list is a bit field with room for 32
       * entries.  There's no reason that it needs to be limited, if
       * there are ever more than 32 entries, convert to a bit array.
       */
#define     DB_VERB_DEADLOCK  0x0001      /* Deadlock detection information. */
#define     DB_VERB_RECOVERY  0x0002      /* Recovery information. */
#define     DB_VERB_REPLICATION     0x0004      /* Replication information. */
#define     DB_VERB_WAITSFOR  0x0008      /* Dump waits-for table. */
      u_int32_t    verbose;   /* Verbose output. */

      void        *app_private;     /* Application-private handle. */

      int (*app_dispatch)           /* User-specified recovery dispatch. */
          __P((DB_ENV *, DBT *, DB_LSN *, db_recops));

      /* Locking. */
      u_int8_t    *lk_conflicts;    /* Two dimensional conflict matrix. */
      int          lk_modes;  /* Number of lock modes in table. */
      u_int32_t    lk_max;    /* Maximum number of locks. */
      u_int32_t    lk_max_lockers;/* Maximum number of lockers. */
      u_int32_t    lk_max_objects;/* Maximum number of locked objects. */
      u_int32_t    lk_detect; /* Deadlock detect on all conflicts. */
      db_timeout_t       lk_timeout;      /* Lock timeout period. */

      /* Logging. */
      u_int32_t    lg_bsize;  /* Buffer size. */
      u_int32_t    lg_size;   /* Log file size. */
      u_int32_t    lg_regionmax;    /* Region size. */

      /* Memory pool. */
      u_int32_t    mp_gbytes; /* Cachesize: GB. */
      u_int32_t    mp_bytes;  /* Cachesize: Bytes. */
      u_int        mp_ncache; /* Number of cache regions. */
      size_t             mp_mmapsize;     /* Maximum file size for mmap. */
      int          mp_maxopenfd;    /* Maximum open file descriptors. */
      int          mp_maxwrite;     /* Maximum buffers to write. */
      int                     /* Sleep after writing max buffers. */
                   mp_maxwrite_sleep;

      /* Replication */
      int          rep_eid;   /* environment id. */
      int         (*rep_send) /* Send function. */
                      __P((DB_ENV *, const DBT *, const DBT *,
                      const DB_LSN *, int, u_int32_t));

      /* Transactions. */
      u_int32_t    tx_max;    /* Maximum number of transactions. */
      time_t             tx_timestamp;    /* Recover to specific timestamp. */
      db_timeout_t       tx_timeout;      /* Timeout for transactions. */

      /*******************************************************
       * Private: owned by DB.
       *******************************************************/
                              /* User files, paths. */
      char        *db_home;   /* Database home. */
      char        *db_log_dir;      /* Database log file directory. */
      char        *db_tmp_dir;      /* Database tmp file directory. */

      char         **db_data_dir;   /* Database data file directories. */
      int          data_cnt;  /* Database data file slots. */
      int          data_next; /* Next Database data file slot. */

      int          db_mode;   /* Default open permissions. */
      int          dir_mode;  /* Intermediate directory perms. */
      u_int32_t    env_lid;   /* Locker ID in non-threaded handles. */
      u_int32_t    open_flags;      /* Flags passed to DB_ENV->open. */

      void        *reginfo;   /* REGINFO structure reference. */
      DB_FH       *lockfhp;   /* fcntl(2) locking file handle. */

      int         (**recover_dtab)  /* Dispatch table for recover funcs. */
                      __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
      size_t             recover_dtab_size;
                              /* Slots in the dispatch table. */

      void        *cl_handle; /* RPC: remote client handle. */
      u_int        cl_id;           /* RPC: remote client env id. */

      int          db_ref;    /* DB reference count. */

      long         shm_key;   /* shmget(2) key. */
      u_int32_t    tas_spins; /* test-and-set spins. */

      /*
       * List of open DB handles for this DB_ENV, used for cursor
       * adjustment.  Must be protected for multi-threaded support.
       *
       * !!!
       * As this structure is allocated in per-process memory, the
       * mutex may need to be stored elsewhere on architectures unable
       * to support mutexes in heap memory, e.g. HP/UX 9.
       *
       * !!!
       * Explicit representation of structure in queue.h.
       * LIST_HEAD(dblist, __db);
       */
      DB_MUTEX    *dblist_mutexp;   /* Mutex. */
      struct {
            struct __db *lh_first;
      } dblist;

      /*
       * XA support.
       *
       * !!!
       * Explicit representations of structures from queue.h.
       * TAILQ_ENTRY(__db_env) links;
       * TAILQ_HEAD(xa_txn, __db_txn);
       */
      struct {
            struct __db_env *tqe_next;
            struct __db_env **tqe_prev;
      } links;
      struct __xa_txn { /* XA Active Transactions. */
            struct __db_txn *tqh_first;
            struct __db_txn **tqh_last;
      } xa_txn;
      int          xa_rmid;   /* XA Resource Manager ID. */

      /* API-private structure. */
      void        *api1_internal;   /* C++, Perl API private */
      void        *api2_internal;   /* Java API private */

      char        *passwd;    /* Cryptography support. */
      size_t             passwd_len;
      void        *crypto_handle;   /* Primary handle. */
      DB_MUTEX    *mt_mutexp; /* Mersenne Twister mutex. */
      int          mti;       /* Mersenne Twister index. */
      u_long            *mt;        /* Mersenne Twister state vector. */

                              /* DB_ENV Methods. */
      int  (*close) __P((DB_ENV *, u_int32_t));
      int  (*dbremove) __P((DB_ENV *,
            DB_TXN *, const char *, const char *, u_int32_t));
      int  (*dbrename) __P((DB_ENV *, DB_TXN *,
            const char *, const char *, const char *, u_int32_t));
      void (*err) __P((const DB_ENV *, int, const char *, ...));
      void (*errx) __P((const DB_ENV *, const char *, ...));
      int  (*open) __P((DB_ENV *, const char *, u_int32_t, int));
      int  (*remove) __P((DB_ENV *, const char *, u_int32_t));
      int  (*stat_print) __P((DB_ENV *, u_int32_t));

                              /* House-keeping. */
      int  (*fileid_reset) __P((DB_ENV *, char *, int));
      int  (*is_bigendian) __P((void));
      int  (*lsn_reset) __P((DB_ENV *, char *, int));
      int  (*prdbt) __P((DBT *,
            int, const char *, void *, int (*)(void *, const void *), int));

                              /* Setters/getters. */
      int  (*set_alloc) __P((DB_ENV *, void *(*)(size_t),
            void *(*)(void *, size_t), void (*)(void *)));
      int  (*set_app_dispatch) __P((DB_ENV *,
            int (*)(DB_ENV *, DBT *, DB_LSN *, db_recops)));
      int  (*get_data_dirs) __P((DB_ENV *, const char ***));
      int  (*set_data_dir) __P((DB_ENV *, const char *));
      int  (*get_encrypt_flags) __P((DB_ENV *, u_int32_t *));
      int  (*set_encrypt) __P((DB_ENV *, const char *, u_int32_t));
      void (*set_errcall) __P((DB_ENV *,
          void (*)(const DB_ENV *, const char *, const char *)));
      void (*get_errfile) __P((DB_ENV *, FILE **));
      void (*set_errfile) __P((DB_ENV *, FILE *));
      void (*get_errpfx) __P((DB_ENV *, const char **));
      void (*set_errpfx) __P((DB_ENV *, const char *));
      int  (*set_feedback) __P((DB_ENV *, void (*)(DB_ENV *, int, int)));
      int  (*get_flags) __P((DB_ENV *, u_int32_t *));
      int  (*set_flags) __P((DB_ENV *, u_int32_t, int));
      int  (*get_home) __P((DB_ENV *, const char **));
      int  (*set_intermediate_dir) __P((DB_ENV *, int, u_int32_t));
      int  (*get_open_flags) __P((DB_ENV *, u_int32_t *));
      int  (*set_paniccall) __P((DB_ENV *, void (*)(DB_ENV *, int)));
      int  (*set_rpc_server) __P((DB_ENV *,
            void *, const char *, long, long, u_int32_t));
      int  (*get_shm_key) __P((DB_ENV *, long *));
      int  (*set_shm_key) __P((DB_ENV *, long));
      void (*set_msgcall) __P((DB_ENV *,
            void (*)(const DB_ENV *, const char *)));
      void (*get_msgfile) __P((DB_ENV *, FILE **));
      void (*set_msgfile) __P((DB_ENV *, FILE *));
      int  (*get_tas_spins) __P((DB_ENV *, u_int32_t *));
      int  (*set_tas_spins) __P((DB_ENV *, u_int32_t));
      int  (*get_tmp_dir) __P((DB_ENV *, const char **));
      int  (*set_tmp_dir) __P((DB_ENV *, const char *));
      int  (*get_verbose) __P((DB_ENV *, u_int32_t, int *));
      int  (*set_verbose) __P((DB_ENV *, u_int32_t, int));

      void *lg_handle;        /* Log handle and methods. */
      int  (*get_lg_bsize) __P((DB_ENV *, u_int32_t *));
      int  (*set_lg_bsize) __P((DB_ENV *, u_int32_t));
      int  (*get_lg_dir) __P((DB_ENV *, const char **));
      int  (*set_lg_dir) __P((DB_ENV *, const char *));
      int  (*get_lg_max) __P((DB_ENV *, u_int32_t *));
      int  (*set_lg_max) __P((DB_ENV *, u_int32_t));
      int  (*get_lg_regionmax) __P((DB_ENV *, u_int32_t *));
      int  (*set_lg_regionmax) __P((DB_ENV *, u_int32_t));
      int  (*log_archive) __P((DB_ENV *, char **[], u_int32_t));
      int  (*log_cursor) __P((DB_ENV *, DB_LOGC **, u_int32_t));
      int  (*log_file) __P((DB_ENV *, const DB_LSN *, char *, size_t));
      int  (*log_flush) __P((DB_ENV *, const DB_LSN *));
      int  (*log_put) __P((DB_ENV *, DB_LSN *, const DBT *, u_int32_t));
      int  (*log_stat) __P((DB_ENV *, DB_LOG_STAT **, u_int32_t));
      int  (*log_stat_print) __P((DB_ENV *, u_int32_t));

      void *lk_handle;        /* Lock handle and methods. */
      int  (*get_lk_conflicts) __P((DB_ENV *, const u_int8_t **, int *));
      int  (*set_lk_conflicts) __P((DB_ENV *, u_int8_t *, int));
      int  (*get_lk_detect) __P((DB_ENV *, u_int32_t *));
      int  (*set_lk_detect) __P((DB_ENV *, u_int32_t));
      int  (*set_lk_max) __P((DB_ENV *, u_int32_t));
      int  (*get_lk_max_locks) __P((DB_ENV *, u_int32_t *));
      int  (*set_lk_max_locks) __P((DB_ENV *, u_int32_t));
      int  (*get_lk_max_lockers) __P((DB_ENV *, u_int32_t *));
      int  (*set_lk_max_lockers) __P((DB_ENV *, u_int32_t));
      int  (*get_lk_max_objects) __P((DB_ENV *, u_int32_t *));
      int  (*set_lk_max_objects) __P((DB_ENV *, u_int32_t));
      int  (*lock_detect) __P((DB_ENV *, u_int32_t, u_int32_t, int *));
      int  (*lock_get) __P((DB_ENV *,
            u_int32_t, u_int32_t, const DBT *, db_lockmode_t, DB_LOCK *));
      int  (*lock_put) __P((DB_ENV *, DB_LOCK *));
      int  (*lock_id) __P((DB_ENV *, u_int32_t *));
      int  (*lock_id_free) __P((DB_ENV *, u_int32_t));
      int  (*lock_stat) __P((DB_ENV *, DB_LOCK_STAT **, u_int32_t));
      int  (*lock_stat_print) __P((DB_ENV *, u_int32_t));
      int  (*lock_vec) __P((DB_ENV *,
            u_int32_t, u_int32_t, DB_LOCKREQ *, int, DB_LOCKREQ **));

      void *mp_handle;        /* Mpool handle and methods. */
      int  (*get_cachesize) __P((DB_ENV *, u_int32_t *, u_int32_t *, int *));
      int  (*set_cachesize) __P((DB_ENV *, u_int32_t, u_int32_t, int));
      int  (*get_mp_mmapsize) __P((DB_ENV *, size_t *));
      int  (*set_mp_mmapsize) __P((DB_ENV *, size_t));
      int  (*get_mp_max_openfd) __P((DB_ENV *, int *));
      int  (*set_mp_max_openfd) __P((DB_ENV *, int));
      int  (*get_mp_max_write) __P((DB_ENV *, int *, int *));
      int  (*set_mp_max_write) __P((DB_ENV *, int, int));
      int  (*memp_fcreate) __P((DB_ENV *, DB_MPOOLFILE **, u_int32_t));
      int  (*memp_register) __P((DB_ENV *, int,
            int (*)(DB_ENV *, db_pgno_t, void *, DBT *),
            int (*)(DB_ENV *, db_pgno_t, void *, DBT *)));
      int  (*memp_stat) __P((DB_ENV *,
            DB_MPOOL_STAT **, DB_MPOOL_FSTAT ***, u_int32_t));
      int  (*memp_stat_print) __P((DB_ENV *, u_int32_t));
      int  (*memp_sync) __P((DB_ENV *, DB_LSN *));
      int  (*memp_trickle) __P((DB_ENV *, int, int *));

      void *rep_handle;       /* Replication handle and methods. */
      int  (*rep_elect) __P((DB_ENV *, int, int, int,
            u_int32_t, int *, u_int32_t));
      int  (*rep_flush) __P((DB_ENV *));
      int  (*rep_process_message) __P((DB_ENV *, DBT *, DBT *,
          int *, DB_LSN *));
      int  (*rep_start) __P((DB_ENV *, DBT *, u_int32_t));
      int  (*rep_stat) __P((DB_ENV *, DB_REP_STAT **, u_int32_t));
      int  (*rep_stat_print) __P((DB_ENV *, u_int32_t));
      int  (*get_rep_limit) __P((DB_ENV *, u_int32_t *, u_int32_t *));
      int  (*set_rep_limit) __P((DB_ENV *, u_int32_t, u_int32_t));
      int  (*set_rep_request) __P((DB_ENV *, u_int32_t, u_int32_t));
      int  (*set_rep_transport) __P((DB_ENV *, int,
            int (*) (DB_ENV *, const DBT *, const DBT *, const DB_LSN *,
            int, u_int32_t)));

      void *tx_handle;        /* Txn handle and methods. */
      int  (*get_tx_max) __P((DB_ENV *, u_int32_t *));
      int  (*set_tx_max) __P((DB_ENV *, u_int32_t));
      int  (*get_tx_timestamp) __P((DB_ENV *, time_t *));
      int  (*set_tx_timestamp) __P((DB_ENV *, time_t *));
      int  (*txn_begin) __P((DB_ENV *, DB_TXN *, DB_TXN **, u_int32_t));
      int  (*txn_checkpoint) __P((DB_ENV *, u_int32_t, u_int32_t, u_int32_t));
      int  (*txn_recover) __P((DB_ENV *,
            DB_PREPLIST *, long, long *, u_int32_t));
      int  (*txn_stat) __P((DB_ENV *, DB_TXN_STAT **, u_int32_t));
      int  (*txn_stat_print) __P((DB_ENV *, u_int32_t));
      int  (*get_timeout) __P((DB_ENV *, db_timeout_t *, u_int32_t));
      int  (*set_timeout) __P((DB_ENV *, db_timeout_t, u_int32_t));

#define     DB_TEST_ELECTINIT  1    /* after __rep_elect_init */
#define     DB_TEST_ELECTVOTE1       2    /* after sending VOTE1 */
#define     DB_TEST_POSTDESTROY      3    /* after destroy op */
#define     DB_TEST_POSTLOG          4    /* after logging all pages */
#define     DB_TEST_POSTLOGMETA      5    /* after logging meta in btree */
#define     DB_TEST_POSTOPEN   6    /* after __os_open */
#define     DB_TEST_POSTSYNC   7    /* after syncing the log */
#define     DB_TEST_PREDESTROY       8    /* before destroy op */
#define     DB_TEST_PREOPEN          9    /* before __os_open */
#define     DB_TEST_SUBDB_LOCKS      10   /* subdb locking tests */
      int          test_abort;      /* Abort value for testing. */
      int          test_check;      /* Checkpoint value for testing. */
      int          test_copy; /* Copy value for testing. */

#define     DB_ENV_AUTO_COMMIT      0x0000001 /* DB_AUTO_COMMIT. */
#define     DB_ENV_CDB        0x0000002 /* DB_INIT_CDB. */
#define     DB_ENV_CDB_ALLDB  0x0000004 /* CDB environment wide locking. */
#define     DB_ENV_CREATE           0x0000008 /* DB_CREATE set. */
#define     DB_ENV_DBLOCAL          0x0000010 /* DB_ENV allocated for private DB. */
#define     DB_ENV_DIRECT_DB  0x0000020 /* DB_DIRECT_DB set. */
#define     DB_ENV_DIRECT_LOG 0x0000040 /* DB_DIRECT_LOG set. */
#define     DB_ENV_DSYNC_LOG  0x0000080 /* DB_DSYNC_LOG set. */
#define     DB_ENV_FATAL            0x0000100 /* Doing fatal recovery in env. */
#define     DB_ENV_LOCKDOWN         0x0000200 /* DB_LOCKDOWN set. */
#define     DB_ENV_LOG_AUTOREMOVE   0x0000400 /* DB_LOG_AUTOREMOVE set. */
#define     DB_ENV_LOG_INMEMORY     0x0000800 /* DB_LOG_INMEMORY set. */
#define     DB_ENV_NOLOCKING  0x0001000 /* DB_NOLOCKING set. */
#define     DB_ENV_NOMMAP           0x0002000 /* DB_NOMMAP set. */
#define     DB_ENV_NOPANIC          0x0004000 /* Okay if panic set. */
#define     DB_ENV_OPEN_CALLED      0x0008000 /* DB_ENV->open called. */
#define     DB_ENV_OVERWRITE  0x0010000 /* DB_OVERWRITE set. */
#define     DB_ENV_PRIVATE          0x0020000 /* DB_PRIVATE set. */
#define     DB_ENV_REGION_INIT      0x0040000 /* DB_REGION_INIT set. */
#define     DB_ENV_RPCCLIENT  0x0080000 /* DB_RPCCLIENT set. */
#define     DB_ENV_RPCCLIENT_GIVEN  0x0100000 /* User-supplied RPC client struct */
#define     DB_ENV_SYSTEM_MEM 0x0200000 /* DB_SYSTEM_MEM set. */
#define     DB_ENV_THREAD           0x0400000 /* DB_THREAD set. */
#define     DB_ENV_TIME_NOTGRANTED  0x0800000 /* DB_TIME_NOTGRANTED set. */
#define     DB_ENV_TXN_NOSYNC 0x1000000 /* DB_TXN_NOSYNC set. */
#define     DB_ENV_TXN_WRITE_NOSYNC 0x2000000 /* DB_TXN_WRITE_NOSYNC set. */
#define     DB_ENV_YIELDCPU         0x4000000 /* DB_YIELDCPU set. */
      u_int32_t flags;
};

#ifndef DB_DBM_HSEARCH
#define     DB_DBM_HSEARCH    0           /* No historic interfaces by default. */
#endif
#if DB_DBM_HSEARCH != 0
/*******************************************************
 * Dbm/Ndbm historic interfaces.
 *******************************************************/
typedef struct __db DBM;

#define     DBM_INSERT  0           /* Flags to dbm_store(). */
#define     DBM_REPLACE 1

/*
 * The DB support for ndbm(3) always appends this suffix to the
 * file name to avoid overwriting the user's original database.
 */
#define     DBM_SUFFIX  ".db"

#if defined(_XPG4_2)
typedef struct {
      char *dptr;
      size_t dsize;
} datum;
#else
typedef struct {
      char *dptr;
      int dsize;
} datum;
#endif

/*
 * Translate NDBM calls into DB calls so that DB doesn't step on the
 * application's name space.
 */
#define     dbm_clearerr(a)         __db_ndbm_clearerr(a)
#define     dbm_close(a)            __db_ndbm_close(a)
#define     dbm_delete(a, b)  __db_ndbm_delete(a, b)
#define     dbm_dirfno(a)           __db_ndbm_dirfno(a)
#define     dbm_error(a)            __db_ndbm_error(a)
#define     dbm_fetch(a, b)         __db_ndbm_fetch(a, b)
#define     dbm_firstkey(a)         __db_ndbm_firstkey(a)
#define     dbm_nextkey(a)          __db_ndbm_nextkey(a)
#define     dbm_open(a, b, c) __db_ndbm_open(a, b, c)
#define     dbm_pagfno(a)           __db_ndbm_pagfno(a)
#define     dbm_rdonly(a)           __db_ndbm_rdonly(a)
#define     dbm_store(a, b, c, d) \
      __db_ndbm_store(a, b, c, d)

/*
 * Translate DBM calls into DB calls so that DB doesn't step on the
 * application's name space.
 *
 * The global variables dbrdonly, dirf and pagf were not retained when 4BSD
 * replaced the dbm interface with ndbm, and are not supported here.
 */
#define     dbminit(a)  __db_dbm_init(a)
#define     dbmclose    __db_dbm_close
#if !defined(__cplusplus)
#define     delete(a)   __db_dbm_delete(a)
#endif
#define     fetch(a)    __db_dbm_fetch(a)
#define     firstkey    __db_dbm_firstkey
#define     nextkey(a)  __db_dbm_nextkey(a)
#define     store(a, b) __db_dbm_store(a, b)

/*******************************************************
 * Hsearch historic interface.
 *******************************************************/
typedef enum {
      FIND, ENTER
} ACTION;

typedef struct entry {
      char *key;
      char *data;
} ENTRY;

#define     hcreate(a)  __db_hcreate(a)
#define     hdestroy    __db_hdestroy
#define     hsearch(a, b)     __db_hsearch(a, b)

#endif /* DB_DBM_HSEARCH */

#if defined(__cplusplus)
}
#endif
#endif /* !_DB_H_ */

/* DO NOT EDIT: automatically built by dist/s_include. */
#ifndef     _DB_EXT_PROT_IN_
#define     _DB_EXT_PROT_IN_

#if defined(__cplusplus)
extern "C" {
#endif

int db_create __P((DB **, DB_ENV *, u_int32_t));
char *db_strerror __P((int));
int db_env_create __P((DB_ENV **, u_int32_t));
char *db_version __P((int *, int *, int *));
int log_compare __P((const DB_LSN *, const DB_LSN *));
int db_env_set_func_close __P((int (*)(int)));
int db_env_set_func_dirfree __P((void (*)(char **, int)));
int db_env_set_func_dirlist __P((int (*)(const char *, char ***, int *)));
int db_env_set_func_exists __P((int (*)(const char *, int *)));
int db_env_set_func_free __P((void (*)(void *)));
int db_env_set_func_fsync __P((int (*)(int)));
int db_env_set_func_ftruncate __P((int (*)(int, off_t)));
int db_env_set_func_ioinfo __P((int (*)(const char *, int, u_int32_t *, u_int32_t *, u_int32_t *)));
int db_env_set_func_malloc __P((void *(*)(size_t)));
int db_env_set_func_map __P((int (*)(char *, size_t, int, int, void **)));
int db_env_set_func_pread __P((ssize_t (*)(int, void *, size_t, off_t)));
int db_env_set_func_pwrite __P((ssize_t (*)(int, const void *, size_t, off_t)));
int db_env_set_func_open __P((int (*)(const char *, int, ...)));
int db_env_set_func_read __P((ssize_t (*)(int, void *, size_t)));
int db_env_set_func_realloc __P((void *(*)(void *, size_t)));
int db_env_set_func_rename __P((int (*)(const char *, const char *)));
int db_env_set_func_seek __P((int (*)(int, off_t, int)));
int db_env_set_func_sleep __P((int (*)(u_long, u_long)));
int db_env_set_func_unlink __P((int (*)(const char *)));
int db_env_set_func_unmap __P((int (*)(void *, size_t)));
int db_env_set_func_write __P((ssize_t (*)(int, const void *, size_t)));
int db_env_set_func_yield __P((int (*)(void)));
int db_sequence_create __P((DB_SEQUENCE **, DB *, u_int32_t));
#if DB_DBM_HSEARCH != 0
int    __db_ndbm_clearerr __P((DBM *));
void   __db_ndbm_close __P((DBM *));
int    __db_ndbm_delete __P((DBM *, datum));
int    __db_ndbm_dirfno __P((DBM *));
int    __db_ndbm_error __P((DBM *));
datum __db_ndbm_fetch __P((DBM *, datum));
datum __db_ndbm_firstkey __P((DBM *));
datum __db_ndbm_nextkey __P((DBM *));
DBM   *__db_ndbm_open __P((const char *, int, int));
int    __db_ndbm_pagfno __P((DBM *));
int    __db_ndbm_rdonly __P((DBM *));
int    __db_ndbm_store __P((DBM *, datum, datum, int));
int    __db_dbm_close __P((void));
int    __db_dbm_delete __P((datum));
datum __db_dbm_fetch __P((datum));
datum __db_dbm_firstkey __P((void));
int    __db_dbm_init __P((char *));
datum __db_dbm_nextkey __P((datum));
int    __db_dbm_store __P((datum, datum));
#endif
#if DB_DBM_HSEARCH != 0
int __db_hcreate __P((size_t));
ENTRY *__db_hsearch __P((ENTRY, ACTION));
void __db_hdestroy __P((void));
#endif

#if defined(__cplusplus)
}
#endif
#endif /* !_DB_EXT_PROT_IN_ */

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