ssl_engine_mutex.c revision bc8fd1b0b1afdf89b8d28eefa8cd74e26ba97986
/* _ _
** _ __ ___ ___ __| | ___ ___| | mod_ssl
** | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL
** | | | | | | (_) | (_| | \__ \__ \ | www.modssl.org
** |_| |_| |_|\___/ \__,_|___|___/___/_| ftp.modssl.org
** |_____|
** ssl_engine_mutex.c
** Semaphore for Mutual Exclusion
*/
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 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.
* ====================================================================
*/
/* ``Real programmers confuse
Christmas and Halloween
because DEC 25 = OCT 31.''
-- Unknown */
#include "mod_ssl.h"
int ssl_mutex_init(server_rec *s, apr_pool_t *p)
{
SSLModConfigRec *mc = myModConfig(s);
if (mc->nMutexMode == SSL_MUTEXMODE_NONE)
return TRUE;
if (apr_lock_create(&mc->pMutex, APR_MUTEX, APR_LOCKALL, APR_LOCK_DEFAULT,
mc->szMutexFile, p) != APR_SUCCESS) {
ssl_log(s, SSL_LOG_ERROR,
"Cannot create SSLMutex file `%s'",
mc->szMutexFile);
return FALSE;
}
return TRUE;
}
int ssl_mutex_reinit(server_rec *s, apr_pool_t *p)
{
SSLModConfigRec *mc = myModConfig(s);
if (mc->nMutexMode == SSL_MUTEXMODE_NONE)
return TRUE;
if (apr_lock_child_init(&mc->pMutex, mc->szMutexFile, p) != APR_SUCCESS)
return FALSE;
return TRUE;
}
int ssl_mutex_on(server_rec *s)
{
SSLModConfigRec *mc = myModConfig(s);
if (mc->nMutexMode == SSL_MUTEXMODE_NONE)
return TRUE;
if (apr_lock_acquire(mc->pMutex) != APR_SUCCESS) {
ssl_log(s, SSL_LOG_WARN, "Failed to acquire global mutex lock");
return FALSE;
}
return TRUE;
}
int ssl_mutex_off(server_rec *s)
{
SSLModConfigRec *mc = myModConfig(s);
if (mc->nMutexMode == SSL_MUTEXMODE_NONE)
return TRUE;
if (apr_lock_release(mc->pMutex) != APR_SUCCESS) {
ssl_log(s, SSL_LOG_WARN, "Failed to release global mutex lock");
return FALSE;
}
return TRUE;
}