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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
#include "apr.h"
#include "apr_private.h"
#include "apr_general.h"
#include "apr_strings.h"
#include "apr_portable.h"
#include "proc_mutex.h"
#include "misc.h"
static apr_status_t proc_mutex_cleanup(void *mutex_)
{
apr_proc_mutex_t *mutex = mutex_;
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;
/* With Win2000 Terminal Services, the Mutex name can have a
* "Global\" or "Local\" prefix to explicitly create the object
* in the global or session name space. Without Terminal Service
* running on Win2000, Global\ and Local\ are ignored. These
* prefixes are only valid on Win2000+
*/
if (fname) {
if (apr_os_level >= APR_WIN_2000)
fname = apr_pstrcat(pool, "Global\\", fname, NULL);
else
fname = apr_pstrdup(pool, fname);
}
hMutex = CreateMutex(NULL, FALSE, fname);
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;
if (apr_os_level >= APR_WIN_2000)
fname = apr_pstrcat(pool, "Global\\", fname, NULL);
else
fname = apr_pstrdup(pool, fname);
hMutex = OpenMutex(MUTEX_ALL_ACCESS, FALSE, fname);
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(const char *) apr_proc_mutex_name(apr_proc_mutex_t *mutex)
{
return "win32mutex";
}
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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