db/os/os_config.c

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1997, 1998
 *  Sleepycat Software.  All rights reserved.
 */

#include "config.h"

#ifndef lint
static const char sccsid[] = "@(#)os_config.c   10.30 (Sleepycat) 10/12/98";
#endif /* not lint */

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

#include <errno.h>
#endif

#include "db_int.h"
#include "os_jump.h"

struct __db_jumptab __db_jump;

DB_GLOBALS __db_global_values = {
    1,              /* DB_MUTEXLOCKS */
    0,              /* DB_PAGEYIELD */
    0,              /* DB_REGION_ANON, DB_REGION_NAME */
    0,              /* DB_REGION_INIT */
    0,              /* DB_TSL_SPINS */
        {NULL, &__db_global_values.db_envq.tqh_first},  /* Environemnt queue */
    {NULL, &__db_global_values.db_nameq.tqh_first}  /* Name queue */
};

/*
 * db_jump_set --
 *  Replace functions for the DB package.
 */
int
db_jump_set(func, which)
    void *func;
    int which;
{
    switch (which) {
    case DB_FUNC_CLOSE:
        __db_jump.j_close = (int (*) __P((int)))func;
        break;
    case DB_FUNC_DIRFREE:
        __db_jump.j_dirfree = (void (*) __P((char **, int)))func;
        break;
    case DB_FUNC_DIRLIST:
        __db_jump.j_dirlist =
            (int (*) __P((const char *, char ***, int *)))func;
        break;
    case DB_FUNC_EXISTS:
        __db_jump.j_exists = (int (*) __P((const char *, int *)))func;
        break;
    case DB_FUNC_FREE:
        __db_jump.j_free = (void (*) __P((void *)))func;
        break;
    case DB_FUNC_FSYNC:
        __db_jump.j_fsync = (int (*) __P((int)))func;
        break;
    case DB_FUNC_IOINFO:
        __db_jump.j_ioinfo = (int (*) __P((const char *,
            int, u_int32_t *, u_int32_t *, u_int32_t *)))func;
        break;
    case DB_FUNC_MALLOC:
        __db_jump.j_malloc = (void *(*) __P((size_t)))func;
        break;
    case DB_FUNC_MAP:
        __db_jump.j_map = (int (*)
            __P((char *, int, size_t, int, int, int, void **)))func;
        break;
    case DB_FUNC_OPEN:
        __db_jump.j_open = (int (*) __P((const char *, int, ...)))func;
        break;
    case DB_FUNC_READ:
        __db_jump.j_read =
            (ssize_t (*) __P((int, void *, size_t)))func;
        break;
    case DB_FUNC_REALLOC:
        __db_jump.j_realloc = (void *(*) __P((void *, size_t)))func;
        break;
    case DB_FUNC_RUNLINK:
        __db_jump.j_runlink = (int (*) __P((char *)))func;
        break;
    case DB_FUNC_SEEK:
        __db_jump.j_seek = (int (*)
            __P((int, size_t, db_pgno_t, u_int32_t, int, int)))func;
        break;
    case DB_FUNC_SLEEP:
        __db_jump.j_sleep = (int (*) __P((u_long, u_long)))func;
        break;
    case DB_FUNC_UNLINK:
        __db_jump.j_unlink = (int (*) __P((const char *)))func;
        break;
    case DB_FUNC_UNMAP:
        __db_jump.j_unmap = (int (*) __P((void *, size_t)))func;
        break;
    case DB_FUNC_WRITE:
        __db_jump.j_write =
            (ssize_t (*) __P((int, const void *, size_t)))func;
        break;
    case DB_FUNC_YIELD:
        __db_jump.j_yield = (int (*) __P((void)))func;
        break;
    default:
        return (EINVAL);
    }
    return (0);
}

/*
 * db_value_set --
 *  Replace values for the DB package.
 */
int
db_value_set(value, which)
    int value, which;
{
    int ret;

    switch (which) {
    case DB_MUTEXLOCKS:
        DB_GLOBAL(db_mutexlocks) = value;
        break;
    case DB_PAGEYIELD:
        DB_GLOBAL(db_pageyield) = value;
        break;
    case DB_REGION_ANON:
        if (value != 0 && (ret = __db_mapanon_ok(0)) != 0)
            return (ret);
        DB_GLOBAL(db_region_anon) = value;
        break;
    case DB_REGION_INIT:
        DB_GLOBAL(db_region_init) = value;
        break;
    case DB_REGION_NAME:
        if (value != 0 && (ret = __db_mapanon_ok(1)) != 0)
            return (ret);
        DB_GLOBAL(db_region_anon) = value;
        break;
    case DB_TSL_SPINS:
        if (value <= 0)
            return (EINVAL);
        DB_GLOBAL(db_tsl_spins) = value;
        break;
    default:
        return (EINVAL);
    }
    return (0);
}