G:/ScriptBasic/source/extensions/bdb/db.h

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/* DO NOT EDIT: automatically built by dist/distrib. */
/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996, 1997, 1998, 1999, 2000
 *      Sleepycat Software.  All rights reserved.
 *
 *      $Id: db.h,v 1.1 2002/07/03 14:42:11 verhas Exp $
 */

#ifndef _DB_H_
#define _DB_H_

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

#include <stdio.h>
#endif

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

/*
 * XXX
 * MacOS: ensure that Metrowerks C makes enumeration types int sized.
 */
#ifdef __MWERKS__
#pragma enumsalwaysint on
#endif

/*
 * XXX
 * Handle function prototypes and the keyword "const".  This steps on name
 * space that DB doesn't control, but all of the other solutions are worse.
 *
 * XXX
 * While Microsoft's compiler is ANSI C compliant, it doesn't have _STDC_
 * defined by default, you specify a command line flag or #pragma to turn
 * it on.  Don't do that, however, because some of Microsoft's own header
 * files won't compile.
 */
#undef  __P
#if defined(__STDC__) || defined(__cplusplus) || defined(_MSC_VER)
#define __P(protos)     protos          /* ANSI C prototypes */
#else
#define const
#define __P(protos)     ()              /* K&R C preprocessor */
#endif

/*
 * !!!
 * DB needs basic information about 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 short int16_t;
typedef unsigned short u_int16_t;
typedef int int32_t;
typedef unsigned int u_int32_t;
#endif

#if !defined(_WINSOCKAPI_)
typedef unsigned char u_char;
typedef unsigned short u_short;
typedef unsigned int u_int;
typedef unsigned long u_long;
#endif
typedef int ssize_t;

#define DB_VERSION_MAJOR        3
#define DB_VERSION_MINOR        1
#define DB_VERSION_PATCH        14
#define DB_VERSION_STRING       "Sleepycat Software: Berkeley DB 3.1.14: (June  7, 2000)"

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 */

/* Forward structure declarations, so applications get type checking. */
struct __db;            typedef struct __db DB;
#ifdef DB_DBM_HSEARCH
                        typedef struct __db DBM;
#endif
struct __db_bt_stat;    typedef struct __db_bt_stat DB_BTREE_STAT;
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_stat;   typedef struct __db_log_stat DB_LOG_STAT;
struct __db_lsn;        typedef struct __db_lsn DB_LSN;
struct __db_mpool_finfo;typedef struct __db_mpool_finfo DB_MPOOL_FINFO;
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_qam_stat;   typedef struct __db_qam_stat DB_QUEUE_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 __dbc;           typedef struct __dbc DBC;
struct __dbc_internal;  typedef struct __dbc_internal DBC_INTERNAL;
struct __fh_t;          typedef struct __fh_t DB_FH;
struct __key_range;     typedef struct __key_range DB_KEY_RANGE;

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

        void     *app_private;          /* Key/data application private. */
};

/*
 * Flags understood by both db_env_create and db_create.
 */
#define DB_CXX_NO_EXCEPTIONS  0x000001  /* C++: return error values. */

/*
 * Flags understood by only db_env_create.
 */
#define DB_CLIENT             0x000002  /* Open for a client environment. */

/*
 * Flags understood by only db_create.
 */
#define DB_XA_CREATE          0x000002  /* Open in an XA environment. */

/*
 * Flags understood by both DBENV->open and DB->open.
 */
#define DB_CREATE             0x000001  /* Create file as necessary. */
#define DB_NOMMAP             0x000002  /* Don't mmap underlying file. */
#define DB_THREAD             0x000004  /* Applications are threaded. */

/*
 * Flags understood by both DBENV->open and DBENV->remove.
 */
#define DB_FORCE              0x000008  /* Force (anything). */
#define DB_INIT_CDB           0x000010  /* Concurrent Access Methods. */
#define DB_INIT_LOCK          0x000020  /* Initialize locking. */
#define DB_INIT_LOG           0x000040  /* Initialize logging. */
#define DB_INIT_MPOOL         0x000080  /* Initialize mpool. */
#define DB_INIT_TXN           0x000100  /* Initialize transactions. */
#define DB_RECOVER            0x000200  /* Run normal recovery. */
#define DB_RECOVER_FATAL      0x000400  /* Run catastrophic recovery. */
#define DB_SYSTEM_MEM         0x000800  /* Use system-backed memory. */
#define DB_TXN_NOSYNC         0x001000  /* Do not sync log on commit. */
#define DB_USE_ENVIRON        0x002000  /* Use the environment. */
#define DB_USE_ENVIRON_ROOT   0x004000  /* Use the environment if root. */

/*
 * Flags understood by only DBENV->open.
 */
#define DB_LOCKDOWN           0x008000  /* Lock memory into physical core. */
#define DB_PRIVATE            0x010000  /* DB_ENV is process local. */

/*
 * Flags understood by DBENV->txn_begin.
 */
/*      DB_TXN_NOSYNC         0x001000     Do not sync log on commit. */
#define DB_TXN_SYNC           0x000001  /* Always sync log on commit. */
#define DB_TXN_NOWAIT         0x000002  /* Do not wait for locks in this TXN. */

/*
 * Flags understood by only DB->open.
 */
#define DB_EXCL               0x000008  /* Exclusive open (O_EXCL). */
#define DB_RDONLY             0x000010  /* Read-only (O_RDONLY). */
#define DB_TRUNCATE           0x000020  /* Discard existing DB (O_TRUNC). */
#define DB_FCNTL_LOCKING      0x000040  /* Undocumented: fcntl(2) locking. */
#define DB_ODDFILESIZE        0x000080  /* Undocumented: trunc. to N*pgsize. */
#define DB_RDWRMASTER         0x000100  /* Undoc: allow subdb master open R/W */

/*
 * Flags understood by DB->verify.
 *
 * !!!
 * These must not go over 0x8000, or they will collide with the flags
 * used by __bam_vrfy_subtree.
 */
#define DB_AGGRESSIVE         0x0001  /* Salvage anything which might be data.*/
#define DB_NOORDERCHK         0x0002  /* Skip order check; subdb w/ user func */
#define DB_ORDERCHKONLY       0x0004  /* Only perform an order check on subdb */
#define DB_PR_PAGE            0x0008  /* Show page contents (-da). */
#define DB_PR_HEADERS         0x0010  /* Show only page headers (-dh). */
#define DB_PR_RECOVERYTEST    0x0020  /* Recovery test (-dr). */
#define DB_SALVAGE            0x0040  /* Salvage what looks like data. */
#define DB_VRFY_FLAGMASK      0xffff  /* For masking above flags. */

/*
 * Flags understood by only DB->set_feedback's callback.
 */
/*      DB_RECOVER            0x000200     Running recovery. */
#define DB_UPGRADE            0x000001  /* Upgrading. */

/*
 * Deadlock detector modes; used in the DBENV structure to configure the
 * locking subsystem.
 */
#define DB_LOCK_NORUN           0
#define DB_LOCK_DEFAULT         1       /* Default policy. */
#define DB_LOCK_OLDEST          2       /* Abort oldest transaction. */
#define DB_LOCK_RANDOM          3       /* Abort random transaction. */
#define DB_LOCK_YOUNGEST        4       /* Abort youngest transaction. */

/*
 * Flags understood by only DB->set_flags.
 */
#define DB_DUP                  0x0001  /* Btree, Hash: duplicate keys. */
#define DB_DUPSORT              0x0002  /* Btree, Hash: duplicate keys. */
#define DB_RECNUM               0x0004  /* Btree: record numbers. */
#define DB_RENUMBER             0x0008  /* Recno: renumber on insert/delete. */
#define DB_REVSPLITOFF          0x0010  /* Btree: turn off reverse splits. */
#define DB_SNAPSHOT             0x0020  /* Recno: snapshot the input. */

/*
 * Flags understood only by DB->join.
 */
#define DB_JOIN_NOSORT          0x0001  /* Don't try to optimize join. */

typedef enum {
        DB_TXN_ABORT,
        DB_TXN_BACKWARD_ROLL,
        DB_TXN_FORWARD_ROLL,
        DB_TXN_OPENFILES
} db_recops;

#define DB_UNDO(op)     ((op) == DB_TXN_ABORT || (op) == DB_TXN_BACKWARD_ROLL)
#define DB_REDO(op)     ((op) == DB_TXN_FORWARD_ROLL)

struct __db_env {
        /*******************************************************
         * Public: owned by the application.
         *******************************************************/
        FILE            *db_errfile;    /* Error message file stream. */
        const char      *db_errpfx;     /* Error message prefix. */
                                        /* Callbacks. */
        void (*db_errcall) __P((const char *, char *));
        void (*db_feedback) __P((DB_ENV *, int, int));
        void (*db_paniccall) __P((DB_ENV *, int));
        int  (*db_recovery_init) __P((DB_ENV *));

        /*
         * 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_CHKPOINT        0x0001  /* List checkpoints. */
#define DB_VERB_DEADLOCK        0x0002  /* Deadlock detection information. */
#define DB_VERB_RECOVERY        0x0004  /* Recovery information. */
#define DB_VERB_WAITSFOR        0x0008  /* Dump waits-for table. */
        u_int32_t        verbose;       /* Verbose output. */

        /* Locking. */
        u_int8_t        *lk_conflicts;  /* Two dimensional conflict matrix. */
        u_int32_t        lk_modes;      /* Number of lock modes in table. */
        u_int32_t        lk_max;        /* Maximum number of locks. */
        u_int32_t        lk_detect;     /* Deadlock detect on all conflicts. */

        /* Logging. */
        u_int32_t        lg_bsize;      /* Buffer size. */
        u_int32_t        lg_max;        /* Maximum file size. */

        /* Memory pool. */
        u_int32_t        mp_gbytes;     /* Cachesize: GB. */
        u_int32_t        mp_bytes;      /* Cachesize: Bytes. */
        size_t           mp_size;       /* DEPRECATED: Cachesize: bytes. */
        int              mp_ncache;     /* Number of cache regions. */
        size_t           mp_mmapsize;   /* Maximum file size for mmap. */

        /* Transactions. */
        u_int32_t        tx_max;        /* Maximum number of transactions. */
        time_t           tx_timestamp;  /* Recover to specific timestamp. */
        int (*tx_recover)               /* Dispatch function for recovery. */
            __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));

        /*******************************************************
         * Private: owned by DB.
         *******************************************************/
        int              db_panic;      /* Panic causing errno. */

        /* 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. */

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

        void            *lg_handle;     /* Log handle. */

        void            *lk_handle;     /* Lock handle. */

        void            *mp_handle;     /* Mpool handle. */

        void            *tx_handle;     /* Txn handle. */

        int           (**dtab)          /* Dispatch table */
                            __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
        size_t           dtab_size;     /* Slots in the dispatch table. */

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

        int              dblocal_ref;   /* DB_ENV_DBLOCAL: reference count. */

        /*
         * XA support.
         *
         * !!!
         * Explicit representations of structures in queue.h.
         *
         * TAILQ_ENTRY(__db_env);
         */
        struct {
                struct __db_env *tqe_next;
                struct __db_env **tqe_prev;
        } links;
        int              xa_rmid;       /* XA Resource Manager ID. */
        DB_TXN          *xa_txn;        /* XA Current transaction. */

        void    *cj_internal;           /* C++/Java private. */

                                        /* Methods. */
        int  (*close) __P((DB_ENV *, 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  (*set_data_dir) __P((DB_ENV *, const char *));
        void (*set_errcall) __P((DB_ENV *, void (*)(const char *, char *)));
        void (*set_errfile) __P((DB_ENV *, FILE *));
        void (*set_errpfx) __P((DB_ENV *, const char *));
        int  (*set_feedback) __P((DB_ENV *, void (*)(DB_ENV *, int, int)));
        int  (*set_paniccall) __P((DB_ENV *, void (*)(DB_ENV *, int)));
        int  (*set_recovery_init) __P((DB_ENV *, int (*)(DB_ENV *)));
        int  (*set_server) __P((DB_ENV *, char *, long, long, u_int32_t));
        int  (*set_shm_key) __P((DB_ENV *, long));
        int  (*set_tmp_dir) __P((DB_ENV *, const char *));
        int  (*set_verbose) __P((DB_ENV *, u_int32_t, int));

        int  (*set_lg_bsize) __P((DB_ENV *, u_int32_t));
        int  (*set_lg_dir) __P((DB_ENV *, const char *));
        int  (*set_lg_max) __P((DB_ENV *, u_int32_t));

        int  (*set_lk_conflicts) __P((DB_ENV *, u_int8_t *, int));
        int  (*set_lk_detect) __P((DB_ENV *, u_int32_t));
        int  (*set_lk_max) __P((DB_ENV *, u_int32_t));

        int  (*set_mp_mmapsize) __P((DB_ENV *, size_t));
        int  (*set_cachesize) __P((DB_ENV *, u_int32_t, u_int32_t, int));

        int  (*set_tx_max) __P((DB_ENV *, u_int32_t));
        int  (*set_tx_recover) __P((DB_ENV *,
                int (*)(DB_ENV *, DBT *, DB_LSN *, db_recops, void *)));
        int  (*set_tx_timestamp) __P((DB_ENV *, time_t *));

#ifdef CONFIG_TEST
#define DB_TEST_PREOPEN          1      /* before __os_open */
#define DB_TEST_POSTOPEN         2      /* after __os_open */
#define DB_TEST_POSTLOGMETA      3      /* after logging meta in btree */
#define DB_TEST_POSTLOG          4      /* after logging all pages */
#define DB_TEST_POSTSYNC         5      /* after syncing the log */
#define DB_TEST_PRERENAME        6      /* before __os_rename */
#define DB_TEST_POSTRENAME       7      /* after __os_rename */
        int              test_abort;    /* Abort value for testing. */
        int              test_copy;     /* Copy value for testing. */
#endif

#define DB_ENV_CDB              0x00001 /* DB_INIT_CDB. */
#define DB_ENV_CREATE           0x00002 /* DB_CREATE set. */
#define DB_ENV_DBLOCAL          0x00004 /* DB_ENV allocated for private DB. */
#define DB_ENV_LOCKDOWN         0x00008 /* DB_LOCKDOWN set. */
#define DB_ENV_NOMMAP           0x00010 /* DB_NOMMAP set. */
#define DB_ENV_OPEN_CALLED      0x00020 /* DBENV->open called (paths valid). */
#define DB_ENV_PRIVATE          0x00040 /* DB_PRIVATE set. */
#define DB_ENV_RPCCLIENT        0x00080 /* DB_CLIENT set. */
#define DB_ENV_STANDALONE       0x00100 /* Test: freestanding environment. */
#define DB_ENV_SYSTEM_MEM       0x00200 /* DB_SYSTEM_MEM set. */
#define DB_ENV_THREAD           0x00400 /* DB_THREAD set. */
#define DB_ENV_TXN_NOSYNC       0x00800 /* DB_TXN_NOSYNC set. */
#define DB_ENV_USER_ALLOC       0x01000 /* User allocated the structure. */
        u_int32_t        flags;         /* Flags. */
};

/*******************************************************
 * Access methods.
 *******************************************************/
/*
 * !!!
 * Changes here must be reflected in java/src/com/sleepycat/db/Db.java.
 */
typedef enum {
        DB_BTREE=1,
        DB_HASH,
        DB_RECNO,
        DB_QUEUE,
        DB_UNKNOWN                      /* Figure it out on open. */
} DBTYPE;

#define DB_BTREEVERSION 8               /* Current btree version. */
#define DB_BTREEOLDVER  6               /* Oldest btree version supported. */
#define DB_BTREEMAGIC   0x053162

#define DB_HASHVERSION  7               /* Current hash version. */
#define DB_HASHOLDVER   4               /* Oldest hash version supported. */
#define DB_HASHMAGIC    0x061561

#define DB_QAMVERSION   2               /* Current queue version. */
#define DB_QAMOLDVER    1               /* Oldest queue version supported. */
#define DB_QAMMAGIC     0x042253

#define DB_LOGVERSION   2               /* Current log version. */
#define DB_LOGOLDVER    2               /* Oldest log version supported. */
#define DB_LOGMAGIC     0x040988

/*
 * 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_CHECKPOINT    5              /* log_put(), log_get() */
#define DB_CONSUME       6              /* c_get() */
#define DB_CURLSN        7              /* log_put() */
#define DB_CURRENT       8              /* c_get(), c_put(), log_get() */
#define DB_FIRST         9              /* c_get(), log_get() */
#define DB_FLUSH        10              /* log_put() */
#define DB_GET_BOTH     11              /* get(), c_get() */
#define DB_GET_BOTHC    12              /* c_get() (internal) */
#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(), log_get() */
#define DB_NEXT         18              /* c_get(), log_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_POSITIONI    25              /* c_dup() (internal) */
#define DB_PREV         26              /* c_get(), log_get() */
#define DB_PREV_NODUP   27              /* c_get(), log_get() */
#define DB_RECORDCOUNT  28              /* stat() */
#define DB_SET          29              /* c_get(), log_get() */
#define DB_SET_RANGE    30              /* c_get() */
#define DB_SET_RECNO    31              /* get(), c_get() */
#define DB_WRITECURSOR  32              /* cursor() */
#define DB_WRITELOCK    33              /* cursor() (internal) */

/* This has to change when the max opcode hits 255. */
#define DB_OPFLAGS_MASK 0x000000ff      /* Mask for operations flags. */
#define DB_RMW          0x80000000      /* Acquire write flag immediately. */

/*
 * DB (user visible) error return codes.
 *
 * !!!
 * Changes to any of the user visible error return codes must be reflected
 * in java/src/com/sleepycat/db/Db.java.
 *
 * !!!
 * 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.
 */
#define DB_INCOMPLETE           (-30999)/* Sync didn't finish. */
#define DB_KEYEMPTY             (-30998)/* Key/data deleted or never created. */
#define DB_KEYEXIST             (-30997)/* The key/data pair already exists. */
#define DB_LOCK_DEADLOCK        (-30996)/* Deadlock. */
#define DB_LOCK_NOTGRANTED      (-30995)/* Lock unavailable. */
#define DB_NOSERVER             (-30994)/* Server panic return. */
#define DB_NOSERVER_HOME        (-30993)/* Bad home sent to server. */
#define DB_NOSERVER_ID          (-30992)/* Bad ID sent to server. */
#define DB_NOTFOUND             (-30991)/* Key/data pair not found (EOF). */
#define DB_OLD_VERSION          (-30990)/* Out-of-date version. */
#define DB_RUNRECOVERY          (-30989)/* Panic return. */
#define DB_VERIFY_BAD           (-30988)/* Verify failed; bad format. */

/* DB (private) error return codes. */
#define DB_DELETED              (-30899)/* Recovery file marked deleted. */
#define DB_NEEDSPLIT            (-30898)/* Page needs to be split. */
#define DB_SWAPBYTES            (-30897)/* Database needs byte swapping. */
#define DB_TXN_CKP              (-30896)/* Encountered ckp record in log. */
#define DB_VERIFY_FATAL         (-30895)/* Fatal: DB->verify cannot proceed. */

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

/* DB access method description structure. */
struct __db {
        /*******************************************************
         * Public: owned by the application.
         *******************************************************/
        u_int32_t pgsize;               /* Database logical page size. */

                                        /* Callbacks. */
        void (*db_feedback) __P((DB *, int, int));
        void *(*db_malloc) __P((size_t));
        void *(*db_realloc) __P((void *, size_t));
        int (*dup_compare) __P((const DBT *, const DBT *));

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

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

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

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

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

#define DB_LOGFILEID_INVALID    -1
        int32_t  log_fileid;            /* File's unique ID for logging. */
        db_pgno_t meta_pgno;            /* Meta page number */
        DB_TXN  *open_txn;              /* Transaction to protect creates. */

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

        /*
         * !!!
         * 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, used in the log's dbentry table
         * to keep track of all open db handles for a given log id.
         * !!!
         * Explicit representations of structures in queue.h.
         *
         * TAILQ_ENTRY(__db) links;
         */
        struct {
                struct __db *tqe_next;
                struct __db **tqe_prev;
        } links;

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

        void    *bt_internal;           /* Btree/Recno access method private. */
        void    *cj_internal;           /* C++/Java private. */
        void    *h_internal;            /* Hash access method private. */
        void    *q_internal;            /* Queue access method private. */
        void    *xa_internal;           /* XA private. */

                                        /* Methods. */
        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));
        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  (*get_byteswapped) __P((DB *));
        DBTYPE
             (*get_type) __P((DB *));
        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 *,
                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  (*set_cachesize) __P((DB *, u_int32_t, u_int32_t, int));
        int  (*set_dup_compare) __P((DB *, int (*)(const DBT *, const DBT *)));
        void (*set_errcall) __P((DB *, void (*)(const char *, 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));
        int  (*set_malloc) __P((DB *, void *(*)(size_t)));
        int  (*set_pagesize) __P((DB *, u_int32_t));
        int  (*set_paniccall) __P((DB *, void (*)(DB_ENV *, int)));
        int  (*set_realloc) __P((DB *, void *(*)(void *, size_t)));
        int  (*stat) __P((DB *, void *, void *(*)(size_t), 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  (*set_bt_compare) __P((DB *, int (*)(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 (*)(const DBT *, const DBT *)));

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

        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 *));

#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_DISCARD   0x00001         /* Discard any cached pages. */
#define DB_AM_DUP       0x00002         /* DB_DUP. */
#define DB_AM_DUPSORT   0x00004         /* DB_DUPSORT. */
#define DB_AM_INMEM     0x00008         /* In-memory; no sync on close. */
#define DB_AM_PGDEF     0x00010         /* Page size was defaulted. */
#define DB_AM_RDONLY    0x00020         /* Database is readonly. */
#define DB_AM_RECOVER   0x00040         /* DBP opened by recovery routine. */
#define DB_AM_SUBDB     0x00080         /* Subdatabases supported. */
#define DB_AM_SWAP      0x00100         /* Pages need to be byte-swapped. */
#define DB_BT_RECNUM    0x00200         /* DB_RECNUM. */
#define DB_BT_REVSPLIT  0x00400         /* DB_REVSPLITOFF. */
#define DB_DBM_ERROR    0x00800         /* Error in DBM/NDBM database. */
#define DB_OPEN_CALLED  0x01000         /* DB->open called. */
#define DB_RE_DELIMITER 0x02000         /* Variablen length delimiter set. */
#define DB_RE_FIXEDLEN  0x04000         /* Fixed-length records. */
#define DB_RE_PAD       0x08000         /* Fixed-length record pad. */
#define DB_RE_RENUMBER  0x10000         /* DB_RENUMBER. */
#define DB_RE_SNAPSHOT  0x20000         /* DB_SNAPSHOT. */
        u_int32_t flags;
};

/*
 * 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_RECORD_LOCK  1
#define DB_PAGE_LOCK    2
        u_int8_t type;                  /* Record or Page 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 {
        size_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. */
};

/* Cursor description structure. */
struct __dbc {
        DB *dbp;                        /* Related DB access method. */
        DB_TXN   *txn;                  /* Associated transaction. */

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

        DBC *opd;                       /* Off-page duplicate cursor. */

        DBT       rkey;                 /* Returned key. */
        DBT       rdata;                /* 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;               /* Lock held on this cursor. */

        long      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_put) __P((DBC *, DBT *, DBT *, u_int32_t));

                                        /* Methods: private. */
        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      0x001           /* Cursor is being used. */
#define DBC_OPD         0x002           /* Cursor references off-page dups. */
#define DBC_RECOVER     0x004           /* Cursor created by  recovery routine
                                         * (do not log or lock).
                                         */
#define DBC_RMW         0x008           /* Acquire write flag in read op. */
#define DBC_WRITECURSOR 0x010           /* Cursor may be used to write (CDB). */
#define DBC_WRITEDUP    0x020           /* idup'ed DBC_WRITECURSOR (CDB). */
#define DBC_WRITER      0x040           /* Cursor immediately writing (CDB). */
#define DBC_TRANSIENT   0x080           /* Cursor is transient. */
        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_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. */
};

/* 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_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_start;             /* Start offset. */
        u_int32_t qs_first_recno;       /* First not deleted record. */
        u_int32_t qs_cur_recno;         /* Last allocated record number. */
};

/* 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_nelem;           /* Original nelem specified. */
        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. */
};

int   db_create __P((DB **, DB_ENV *, u_int32_t));
int   db_env_create __P((DB_ENV **, u_int32_t));
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_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_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, size_t, db_pgno_t, u_int32_t, int, 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_env_set_mutexlocks __P((int));
int   db_env_set_pageyield __P((int));
int   db_env_set_panicstate __P((int));
int   db_env_set_region_init __P((int));
int   db_env_set_tas_spins __P((u_int32_t));
char *db_strerror __P((int));
char *db_version __P((int *, int *, int *));

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

/* Flag values for lock_vec(), lock_get(). */
#define DB_LOCK_NOWAIT          0x01    /* Don't wait on unavailable lock. */
#define DB_LOCK_RECORD          0x02    /* Internal: record lock. */
#define DB_LOCK_UPGRADE         0x04    /* Internal: upgrade existing lock. */

/* Flag values for lock_detect(). */
#define DB_LOCK_CONFLICT        0x01    /* Run on any conflict. */

/*
 * Request types.
 *
 * !!!
 * Changes here must be reflected in java/src/com/sleepycat/db/Db.java.
 */
typedef enum {
        DB_LOCK_DUMP=0,                 /* Display held locks. */
        DB_LOCK_GET,                    /* Get the lock. */
        DB_LOCK_INHERIT,                /* Pass locks to parent. */
        DB_LOCK_PUT,                    /* Release the lock. */
        DB_LOCK_PUT_ALL,                /* Release locker's locks. */
        DB_LOCK_PUT_OBJ                 /* Release locker's locks on obj. */
} db_lockop_t;

/*
 * 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.
 *
 * !!!
 * Changes here must be reflected in java/src/com/sleepycat/db/Db.java.
 */
typedef enum {
        DB_LOCK_NG=0,                   /* Not granted. */
        DB_LOCK_READ,                   /* Shared/read. */
        DB_LOCK_WRITE,                  /* Exclusive/write. */
        DB_LOCK_IWRITE,                 /* Intent exclusive/write. */
        DB_LOCK_IREAD,                  /* Intent to share/read. */
        DB_LOCK_IWR                     /* Intent to read and write. */
} db_lockmode_t;

/*
 * Status of a lock.
 */
typedef enum {
        DB_LSTAT_ABORTED,               /* Lock belongs to an aborted txn. */
        DB_LSTAT_ERR,                   /* Lock is bad. */
        DB_LSTAT_FREE,                  /* Lock is unallocated. */
        DB_LSTAT_HELD,                  /* Lock is currently held. */
        DB_LSTAT_NOGRANT,               /* Lock was not granted. */
        DB_LSTAT_PENDING,               /* Lock was waiting and has been
                                         * promoted; waiting for the owner
                                         * to run and upgrade it to held. */
        DB_LSTAT_WAITING                /* Lock is on the wait queue. */
} db_status_t;

/* Lock request structure. */
struct __db_lockreq {
        db_lockop_t      op;            /* Operation. */
        db_lockmode_t    mode;          /* Requested mode. */
        u_int32_t        locker;        /* Locker identity. */
        DBT             *obj;           /* Object being locked. */
        DB_LOCK          lock;          /* Lock returned. */
};

/*
 * Commonly used conflict matrices.
 *
 * Standard Read/Write (or exclusive/shared) locks.
 */
#define DB_LOCK_RW_N    3
extern const u_int8_t db_rw_conflicts[];

/* Multi-granularity locking. */
#define DB_LOCK_RIW_N   6
extern const u_int8_t db_riw_conflicts[];

struct __db_lock_stat {
        u_int32_t st_lastid;            /* Last allocated locker ID. */
        u_int32_t st_maxlocks;          /* Maximum number of locks in table. */
        u_int32_t st_nmodes;            /* Number of lock modes. */
        u_int32_t st_nlockers;          /* Number of lockers. */
        u_int32_t st_maxnlockers;       /* Maximum number of lockers. */
        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. */
        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_regsize;           /* Region size. */
};

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_id __P((DB_ENV *, u_int32_t *));
int       lock_put __P((DB_ENV *, DB_LOCK *));
int       lock_stat __P((DB_ENV *, DB_LOCK_STAT **, void *(*)(size_t)));
int       lock_vec __P((DB_ENV *,
            u_int32_t, u_int32_t, DB_LOCKREQ *, int, DB_LOCKREQ **));

/*******************************************************
 * Logging.
 *******************************************************/
/* Flag values for log_archive(). */
#define DB_ARCH_ABS             0x001   /* Absolute pathnames. */
#define DB_ARCH_DATA            0x002   /* Data files. */
#define DB_ARCH_LOG             0x004   /* Log files. */

/*
 * 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. */
};

/* 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_max;            /* Maximum 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_regsize;           /* Region size. */
};

int      log_archive __P((DB_ENV *, char **[], u_int32_t, void *(*)(size_t)));
int      log_compare __P((const DB_LSN *, const DB_LSN *));
int      log_file __P((DB_ENV *, const DB_LSN *, char *, size_t));
int      log_flush __P((DB_ENV *, const DB_LSN *));
int      log_get __P((DB_ENV *, DB_LSN *, DBT *, u_int32_t));
int      log_put __P((DB_ENV *, DB_LSN *, const DBT *, u_int32_t));
int      log_register __P((DB_ENV *, DB *, const char *));
int      log_stat __P((DB_ENV *, DB_LOG_STAT **, void *(*)(size_t)));
int      log_unregister __P((DB_ENV *, DB *));

/*******************************************************
 * Mpool
 *******************************************************/
/* Flag values for memp_fget(). */
#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. */
#define DB_MPOOL_NEW_GROUP      0x008   /* Create a group of pages. */

/* Flag values for memp_fput(), memp_fset(). */
#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. */

/* Mpool statistics structure. */
struct __db_mpool_stat {
        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_map;               /* Pages from mapped files. */
        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_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_page_clean;        /* Clean pages. */
        u_int32_t st_page_dirty;        /* Dirty pages. */
        u_int32_t st_page_trickle;      /* Pages written by memp_trickle. */
        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_gbytes;            /* Total cache size: GB. */
        u_int32_t st_bytes;             /* Total cache size: B. */
        u_int32_t st_ncache;            /* Number of caches. */
        u_int32_t st_regsize;           /* Cache size. */
};

/* Mpool file open information structure. */
struct __db_mpool_finfo {
        int        ftype;               /* File type. */
        DBT       *pgcookie;            /* Byte-string passed to pgin/pgout. */
        u_int8_t  *fileid;              /* Unique file ID. */
        int32_t    lsn_offset;          /* LSN offset in page. */
        u_int32_t  clear_len;           /* Cleared length on created pages. */
};

/* Mpool file statistics structure. */
struct __db_mpool_fstat {
        char *file_name;                /* File name. */
        size_t st_pagesize;             /* Page size. */
        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_map;               /* Pages from mapped files. */
        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. */
};

int     memp_fclose __P((DB_MPOOLFILE *));
int     memp_fget __P((DB_MPOOLFILE *, db_pgno_t *, u_int32_t, void *));
int     memp_fopen __P((DB_ENV *, const char *,
            u_int32_t, int, size_t, DB_MPOOL_FINFO *, DB_MPOOLFILE **));
int     memp_fput __P((DB_MPOOLFILE *, void *, u_int32_t));
int     memp_fset __P((DB_MPOOLFILE *, void *, u_int32_t));
int     memp_fsync __P((DB_MPOOLFILE *));
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 ***, void *(*)(size_t)));
int     memp_sync __P((DB_ENV *, DB_LSN *));
int     memp_trickle __P((DB_ENV *, int, int *));

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

/* Operations values to the tx_recover() function. */
#define DB_TXN_BACKWARD_ROLL    1       /* Read the log backwards. */
#define DB_TXN_FORWARD_ROLL     2       /* Read the log forwards. */
#define DB_TXN_OPENFILES        3       /* Read for open files. */
#define DB_TXN_REDO             4       /* Redo the operation. */
#define DB_TXN_UNDO             5       /* Undo the operation. */

/* Internal transaction status values. */

/* 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 of the begin record */
};

struct __db_txn_stat {
        DB_LSN    st_last_ckp;          /* lsn of the last checkpoint */
        DB_LSN    st_pending_ckp;       /* last checkpoint did not finish */
        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_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. */
        u_int32_t st_regsize;           /* Region size. */
};

int       txn_abort __P((DB_TXN *));
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_commit __P((DB_TXN *, u_int32_t));
u_int32_t txn_id __P((DB_TXN *));
int       txn_prepare __P((DB_TXN *));
int       txn_stat __P((DB_ENV *, DB_TXN_STAT **, void *(*)(size_t)));

#ifndef DB_DBM_HSEARCH
#define DB_DBM_HSEARCH  0               /* No historic interfaces by default. */
#endif
#if DB_DBM_HSEARCH != 0
/*******************************************************
 * Dbm/Ndbm historic interfaces.
 *******************************************************/
#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 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)

/* Prototype the DB calls. */
int      __db_dbm_close __P((void));
int      __db_dbm_dbrdonly __P((void));
int      __db_dbm_delete __P((datum));
int      __db_dbm_dirf __P((void));
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_pagf __P((void));
int      __db_dbm_store __P((datum, datum));

/*
 * 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)

/* Prototype the DB calls. */
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));

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

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

/*
 * Translate HSEARCH calls into DB calls so that DB doesn't step on the
 * application's name space.
 */
#define hcreate(a)      __db_hcreate(a)
#define hdestroy        __db_hdestroy
#define hsearch(a, b)   __db_hsearch(a, b)

/* Prototype the DB calls. */
int      __db_hcreate __P((size_t));
void     __db_hdestroy __P((void));
ENTRY   *__db_hsearch __P((ENTRY, ACTION));
#endif /* DB_DBM_HSEARCH */

/*
 * XXX
 * MacOS: Reset Metrowerks C enum sizes.
 */
#ifdef __MWERKS__
#pragma enumsalwaysint reset
#endif

#if defined(__cplusplus)
}
#endif

#endif /* !_DB_H_ */

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