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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)os_config.c 10.9 (Sleepycat) 11/28/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#endif
#include "db_int.h"
/*
* XXX
* We provide our own extern declarations so that we don't collide with
* systems that get them wrong, e.g., SunOS.
*/
#ifdef _WIN32
#define fsync _commit
#define imported __declspec(dllimport)
#else
#define imported
#endif
imported extern int close __P((int));
imported extern void free __P((void *));
imported extern int fsync __P((int));
imported extern void *malloc __P((size_t));
imported extern int open __P((const char *, int, ...));
imported extern ssize_t read __P((int, void *, size_t));
imported extern char *strdup __P((const char *));
imported extern void *realloc __P((void *, size_t));
imported extern int unlink __P((const char *));
imported extern ssize_t write __P((int, const void *, size_t));
imported extern void *memset __P((void *, int, size_t));
/*
* __db_jump --
* This list of interfaces that applications can replace. In some
* cases, the user is permitted to replace the standard ANSI C or
* POSIX 1003.1 call, e.g., malloc or read. In others, we provide
* a local interface to the functionality, e.g., __os_map.
*/
struct __db_jumptab __db_jump = {
close, /* DB_FUNC_CLOSE */
__os_dirfree, /* DB_FUNC_DIRFREE */
__os_dirlist, /* DB_FUNC_DIRLIST */
__os_exists, /* DB_FUNC_EXISTS */
free, /* DB_FUNC_FREE */
fsync, /* DB_FUNC_FSYNC */
__os_ioinfo, /* DB_FUNC_IOINFO */
malloc, /* DB_FUNC_MALLOC */
__os_map, /* DB_FUNC_MAP */
open, /* DB_FUNC_OPEN */
read, /* DB_FUNC_READ */
realloc, /* DB_FUNC_REALLOC */
__os_seek, /* DB_FUNC_SEEK */
__os_sleep, /* DB_FUNC_SLEEP */
strdup, /* DB_FUNC_STRDUP */
unlink, /* DB_FUNC_UNLINK */
__os_unmap, /* DB_FUNC_UNMAP */
write, /* DB_FUNC_WRITE */
NULL /* DB_FUNC_YIELD */
};
int __db_tsl_spins; /* DB_TSL_SPINS */
/*
* db_jump_set --
* Replace functions for the DB package.
*/
int
db_jump_set(func, which)
void *func;
int which;
{
switch (which) {
case DB_FUNC_CALLOC:
/*
* XXX
* Obsolete, calloc is no longer called by DB.
*/
break;
case DB_FUNC_CLOSE:
__db_jump.db_close = (int (*) __P((int)))func;
break;
case DB_FUNC_DIRFREE:
__db_jump.db_dirfree = (void (*) __P((char **, int)))func;
break;
case DB_FUNC_DIRLIST:
__db_jump.db_dirlist =
(int (*) __P((const char *, char ***, int *)))func;
break;
case DB_FUNC_EXISTS:
__db_jump.db_exists = (int (*) __P((const char *, int *)))func;
break;
case DB_FUNC_FREE:
__db_jump.db_free = (void (*) __P((void *)))func;
break;
case DB_FUNC_FSYNC:
__db_jump.db_fsync = (int (*) __P((int)))func;
break;
case DB_FUNC_IOINFO:
__db_jump.db_ioinfo =
(int (*) __P((const char *, int, off_t *, off_t *)))func;
break;
case DB_FUNC_MALLOC:
__db_jump.db_malloc = (void *(*) __P((size_t)))func;
break;
case DB_FUNC_MAP:
__db_jump.db_map =
(int (*) __P((int, size_t, int, int, void **)))func;
break;
case DB_FUNC_OPEN:
__db_jump.db_open = (int (*) __P((const char *, int, ...)))func;
break;
case DB_FUNC_READ:
__db_jump.db_read =
(ssize_t (*) __P((int, void *, size_t)))func;
break;
case DB_FUNC_REALLOC:
__db_jump.db_realloc = (void *(*) __P((void *, size_t)))func;
break;
case DB_FUNC_SEEK:
__db_jump.db_seek =
(int (*) __P((int, size_t, db_pgno_t, u_long, int)))func;
break;
case DB_FUNC_SLEEP:
__db_jump.db_sleep = (int (*) __P((u_long, u_long)))func;
break;
case DB_FUNC_STRDUP:
__db_jump.db_strdup = (char *(*) __P((const char *)))func;
break;
case DB_FUNC_UNLINK:
__db_jump.db_unlink = (int (*) __P((const char *)))func;
break;
case DB_FUNC_UNMAP:
__db_jump.db_unmap = (int (*) __P((void *, size_t)))func;
break;
case DB_FUNC_WRITE:
__db_jump.db_write =
(ssize_t (*) __P((int, const void *, size_t)))func;
break;
case DB_FUNC_YIELD:
__db_jump.db_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;
{
switch (which) {
case DB_TSL_SPINS:
if (value <= 0)
return (EINVAL);
__db_tsl_spins = value;
break;
default:
return (EINVAL);
}
return (0);
}
/*
* XXX
* Correct for systems that return NULL when you allocate 0 bytes of memory.
* There are several places in DB where we allocate the number of bytes held
* by the key/data item, and it can be 0. Correct here so that malloc never
* returns a NULL for that reason.
*/
/*
* __db_calloc --
* The calloc(3) function for DB.
*
* PUBLIC: void *__db_calloc __P((size_t, size_t));
*/
void *
__db_calloc(num, size)
size_t num, size;
{
void *p;
size *= num;
if ((p = __db_jump.db_malloc(size == 0 ? 1 : size)) != NULL)
memset(p, 0, size);
return (p);
}
/*
* __db_malloc --
* The malloc(3) function for DB.
*
* PUBLIC: void *__db_malloc __P((size_t));
*/
void *
__db_malloc(size)
size_t size;
{
return (__db_jump.db_malloc(size == 0 ? 1 : size));
}
/*
* __db_realloc --
* The realloc(3) function for DB.
*
* PUBLIC: void *__db_realloc __P((void *, size_t));
*/
void *
__db_realloc(ptr, size)
void *ptr;
size_t size;
{
return (__db_jump.db_realloc(ptr, size == 0 ? 1 : size));
}
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