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/* Copyright 2000-2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr.h"
#include "apr_private.h"
#include "apr_general.h"
#include "apr_strings.h"
#include "apr_portable.h"
#include "apr_arch_file_io.h"
#include "apr_arch_proc_mutex.h"
#include "apr_arch_misc.h"
static apr_status_t proc_mutex_cleanup(void *mutex_)
{
apr_proc_mutex_t *mutex = mutex_;
if (mutex->handle) {
if (CloseHandle(mutex->handle) == 0) {
return apr_get_os_error();
}
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_proc_mutex_create(apr_proc_mutex_t **mutex,
const char *fname,
apr_lockmech_e mech,
apr_pool_t *pool)
{
HANDLE hMutex;
void *mutexkey;
/* res_name_from_filename turns fname into a pseduo-name
* without slashes or backslashes, and prepends the \global
* prefix on Win2K and later
*/
if (fname) {
mutexkey = res_name_from_filename(fname, 1, pool);
}
else {
mutexkey = NULL;
}
#if APR_HAS_UNICODE_FS
IF_WIN_OS_IS_UNICODE
{
hMutex = CreateMutexW(NULL, FALSE, mutexkey);
}
#endif
#if APR_HAS_ANSI_FS
ELSE_WIN_OS_IS_ANSI
{
hMutex = CreateMutexA(NULL, FALSE, mutexkey);
}
#endif
if (!hMutex) {
return apr_get_os_error();
}
*mutex = (apr_proc_mutex_t *)apr_palloc(pool, sizeof(apr_proc_mutex_t));
(*mutex)->pool = pool;
(*mutex)->handle = hMutex;
(*mutex)->fname = fname;
apr_pool_cleanup_register((*mutex)->pool, *mutex,
proc_mutex_cleanup, apr_pool_cleanup_null);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_proc_mutex_child_init(apr_proc_mutex_t **mutex,
const char *fname,
apr_pool_t *pool)
{
HANDLE hMutex;
void *mutexkey;
if (!fname) {
/* Reinitializing unnamed mutexes is a noop in the Unix code. */
return APR_SUCCESS;
}
/* res_name_from_filename turns file into a pseudo-name
* without slashes or backslashes, and prepends the \global
* prefix on Win2K and later
*/
mutexkey = res_name_from_filename(fname, 1, pool);
#if APR_HAS_UNICODE_FS
IF_WIN_OS_IS_UNICODE
{
hMutex = OpenMutexW(MUTEX_ALL_ACCESS, FALSE, mutexkey);
}
#endif
#if APR_HAS_ANSI_FS
ELSE_WIN_OS_IS_ANSI
{
hMutex = OpenMutexA(MUTEX_ALL_ACCESS, FALSE, mutexkey);
}
#endif
if (!hMutex) {
return apr_get_os_error();
}
*mutex = (apr_proc_mutex_t *)apr_palloc(pool, sizeof(apr_proc_mutex_t));
(*mutex)->pool = pool;
(*mutex)->handle = hMutex;
(*mutex)->fname = fname;
apr_pool_cleanup_register((*mutex)->pool, *mutex,
proc_mutex_cleanup, apr_pool_cleanup_null);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_proc_mutex_lock(apr_proc_mutex_t *mutex)
{
DWORD rv;
rv = WaitForSingleObject(mutex->handle, INFINITE);
if (rv == WAIT_OBJECT_0 || rv == WAIT_ABANDONED) {
return APR_SUCCESS;
}
return apr_get_os_error();
}
APR_DECLARE(apr_status_t) apr_proc_mutex_trylock(apr_proc_mutex_t *mutex)
{
DWORD rv;
rv = WaitForSingleObject(mutex->handle, 0);
if (rv == WAIT_OBJECT_0 || rv == WAIT_ABANDONED) {
return APR_SUCCESS;
}
return apr_get_os_error();
}
APR_DECLARE(apr_status_t) apr_proc_mutex_unlock(apr_proc_mutex_t *mutex)
{
if (ReleaseMutex(mutex->handle) == 0) {
return apr_get_os_error();
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_proc_mutex_destroy(apr_proc_mutex_t *mutex)
{
apr_status_t stat;
stat = proc_mutex_cleanup(mutex);
if (stat == APR_SUCCESS) {
apr_pool_cleanup_kill(mutex->pool, mutex, proc_mutex_cleanup);
}
return stat;
}
APR_DECLARE(apr_status_t) apr_proc_mutex_cleanup(void *mutex)
{
return apr_proc_mutex_destroy((apr_proc_mutex_t *)mutex);
}
APR_DECLARE(const char *) apr_proc_mutex_lockfile(apr_proc_mutex_t *mutex)
{
return NULL;
}
APR_DECLARE(const char *) apr_proc_mutex_name(apr_proc_mutex_t *mutex)
{
return mutex->fname;
}
APR_DECLARE(const char *) apr_proc_mutex_defname(void)
{
return "win32mutex";
}
APR_POOL_IMPLEMENT_ACCESSOR(proc_mutex)
/* Implement OS-specific accessors defined in apr_portable.h */
APR_DECLARE(apr_status_t) apr_os_proc_mutex_get(apr_os_proc_mutex_t *ospmutex,
apr_proc_mutex_t *mutex)
{
*ospmutex = mutex->handle;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_os_proc_mutex_put(apr_proc_mutex_t **pmutex,
apr_os_proc_mutex_t *ospmutex,
apr_pool_t *pool)
{
if (pool == NULL) {
return APR_ENOPOOL;
}
if ((*pmutex) == NULL) {
(*pmutex) = (apr_proc_mutex_t *)apr_palloc(pool,
sizeof(apr_proc_mutex_t));
(*pmutex)->pool = pool;
}
(*pmutex)->handle = *ospmutex;
return APR_SUCCESS;
}
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