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/* ====================================================================
* The Kannel Software License, Version 1.0
*
* Copyright (c) 2001-2018 Kannel Group
* Copyright (c) 1998-2001 WapIT Ltd.
* 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
* Kannel Group (http://www.kannel.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Kannel" and "Kannel Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please
* contact org@kannel.org.
*
* 5. Products derived from this software may not be called "Kannel",
* nor may "Kannel" appear in their name, without prior written
* permission of the Kannel Group.
*
* 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 KANNEL GROUP 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 Kannel Group. For more information on
* the Kannel Group, please see <http://www.kannel.org/>.
*
* Portions of this software are based upon software originally written at
* WapIT Ltd., Helsinki, Finland for the Kannel project.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "gwlib/gwlib.h"
#ifdef MUTEX_STATS
Mutex *mutex_create_measured(Mutex *mutex, char *filename, int lineno)
{
mutex->filename = filename;
mutex->lineno = lineno;
mutex->locks = 0;
mutex->collisions = 0;
return mutex;
}
#endif
Mutex *mutex_create_real(void)
{
Mutex *mutex;
mutex = gw_malloc(sizeof(Mutex));
pthread_mutex_init(&mutex->mutex, NULL);
mutex->owner = -1;
mutex->dynamic = 1;
return mutex;
}
Mutex *mutex_init_static_real(Mutex *mutex)
{
pthread_mutex_init(&mutex->mutex, NULL);
mutex->owner = -1;
mutex->dynamic = 0;
return mutex;
}
void mutex_destroy(Mutex *mutex)
{
int ret;
if (mutex == NULL)
return;
#ifdef MUTEX_STATS
if (mutex->locks > 0 || mutex->collisions > 0) {
info(0, "Mutex %s:%d: %ld locks, %ld collisions.",
mutex->filename, mutex->lineno,
mutex->locks, mutex->collisions);
}
#endif
if ((ret = pthread_mutex_destroy(&mutex->mutex)) != 0)
panic(ret, "Attempt to destroy locked mutex!");
if (mutex->dynamic == 0)
return;
gw_free(mutex);
}
void mutex_lock_real(Mutex *mutex, char *file, int line, const char *func)
{
int ret;
gw_assert(mutex != NULL);
#ifdef MUTEX_STATS
ret = pthread_mutex_trylock(&mutex->mutex);
if (ret != 0) {
ret = pthread_mutex_lock(&mutex->mutex);
mutex->collisions++;
}
mutex->locks++;
#else
ret = pthread_mutex_lock(&mutex->mutex);
#endif
if (ret != 0)
panic(0, "%s:%ld: %s: Mutex failure! (Called from %s:%ld:%s.)", \
__FILE__, (long) __LINE__, __func__, file, (long) line, func);
if (mutex->owner == gwthread_self())
panic(0, "%s:%ld: %s: Managed to lock the mutex twice! (Called from %s:%ld:%s.)", \
__FILE__, (long) __LINE__, __func__, file, (long) line, func);
mutex->owner = gwthread_self();
}
int mutex_unlock_real(Mutex *mutex, char *file, int line, const char *func)
{
int ret;
if (mutex == NULL) {
error(0, "%s:%ld: %s: Trying to unlock a NULL mutex! (Called from %s:%ld:%s.)", \
__FILE__, (long) __LINE__, __func__, file, (long) line, func);
return -1;
}
gw_assert(mutex != NULL);
mutex->owner = -1;
ret = pthread_mutex_unlock(&mutex->mutex);
if (ret != 0)
panic(0, "%s:%ld: %s: Mutex failure! (Called from %s:%ld:%s.)", \
__FILE__, (long) __LINE__, __func__, file, (long) line, func);
return ret;
}
int mutex_trylock_real(Mutex *mutex, const char *file, int line, const char *func)
{
int ret;
if (mutex == NULL) {
error(0, "%s:%ld: %s: Trying to lock a NULL mutex! (Called from %s:%ld:%s.)", \
__FILE__, (long) __LINE__, __func__, file, (long) line, func);
return -1;
}
ret = pthread_mutex_trylock(&mutex->mutex);
if (ret == 0) {
if (mutex->owner == gwthread_self())
panic(0, "%s:%ld: %s: Managed to lock the mutex twice! (Called from %s:%ld:%s.)", \
__FILE__, (long) __LINE__, __func__, file, (long) line, func);
mutex->owner = gwthread_self();
}
else if (ret == EINVAL)
panic(0, "%s:%ld: %s: Mutex failure! (Called from %s:%ld:%s.)", \
__FILE__, (long) __LINE__, __func__, file, (long) line, func);
return ret;
}
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