104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1996, 1997
|
|
* Sleepycat Software. All rights reserved.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#ifndef lint
|
|
static const char sccsid[] = "@(#)lock_util.c 10.4 (Sleepycat) 7/22/97";
|
|
#endif /* not lint */
|
|
|
|
#ifndef NO_SYSTEM_INCLUDES
|
|
#include <sys/types.h>
|
|
|
|
#include <fcntl.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include "db_int.h"
|
|
#include "shqueue.h"
|
|
#include "db_page.h"
|
|
#include "db_shash.h"
|
|
#include "hash.h"
|
|
#include "lock.h"
|
|
|
|
/*
|
|
* This function is used to compare a DBT that is about to be entered
|
|
* into a hash table with an object already in the hash table. Note
|
|
* that it just returns true on equal and 0 on not-equal. Therefore this
|
|
* cannot be used as a sort function; its purpose is to be used as a
|
|
* hash comparison function.
|
|
* PUBLIC: int __lock_cmp __P((DBT *, DB_LOCKOBJ *));
|
|
*/
|
|
int
|
|
__lock_cmp(dbt, lock_obj)
|
|
DBT *dbt;
|
|
DB_LOCKOBJ *lock_obj;
|
|
{
|
|
void *obj_data;
|
|
|
|
if (lock_obj->type != DB_LOCK_OBJTYPE)
|
|
return (0);
|
|
obj_data = SH_DBT_PTR(&lock_obj->lockobj);
|
|
return (dbt->size == lock_obj->lockobj.size &&
|
|
memcmp(dbt->data, obj_data, dbt->size) == 0);
|
|
}
|
|
|
|
/*
|
|
* PUBLIC: int __lock_locker_cmp __P((u_int32_t, DB_LOCKOBJ *));
|
|
*/
|
|
int
|
|
__lock_locker_cmp(locker, lock_obj)
|
|
u_int32_t locker;
|
|
DB_LOCKOBJ *lock_obj;
|
|
{
|
|
void *obj_data;
|
|
|
|
if (lock_obj->type != DB_LOCK_LOCKER)
|
|
return (0);
|
|
|
|
obj_data = SH_DBT_PTR(&lock_obj->lockobj);
|
|
return (memcmp(&locker, obj_data, sizeof(u_int32_t)) == 0);
|
|
}
|
|
|
|
/*
|
|
* PUBLIC: int __lock_ohash __P((DBT *));
|
|
*/
|
|
int
|
|
__lock_ohash(dbt)
|
|
DBT *dbt;
|
|
{
|
|
return (__ham_func5(dbt->data, dbt->size));
|
|
}
|
|
|
|
/*
|
|
* PUBLIC: u_int32_t __lock_locker_hash __P((u_int32_t));
|
|
*/
|
|
u_int32_t
|
|
__lock_locker_hash(locker)
|
|
u_int32_t locker;
|
|
{
|
|
return (__ham_func5(&locker, sizeof(locker)));
|
|
}
|
|
|
|
/*
|
|
* PUBLIC: u_int32_t __lock_lhash __P((DB_LOCKOBJ *));
|
|
*/
|
|
u_int32_t
|
|
__lock_lhash(lock_obj)
|
|
DB_LOCKOBJ *lock_obj;
|
|
{
|
|
void *obj_data;
|
|
|
|
obj_data = SH_DBT_PTR(&lock_obj->lockobj);
|
|
return (__ham_func5(obj_data, lock_obj->lockobj.size));
|
|
}
|
|
|