/*
* Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#import "OFPlainMutex.h"
int
OFPlainMutexNew(OFPlainMutex *mutex)
{
return pthread_mutex_init(mutex, NULL);
}
int
OFPlainMutexLock(OFPlainMutex *mutex)
{
return pthread_mutex_lock(mutex);
}
int
OFPlainMutexTryLock(OFPlainMutex *mutex)
{
return pthread_mutex_trylock(mutex);
}
int
OFPlainMutexUnlock(OFPlainMutex *mutex)
{
return pthread_mutex_unlock(mutex);
}
int
OFPlainMutexFree(OFPlainMutex *mutex)
{
return pthread_mutex_destroy(mutex);
}
#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
int
OFPlainRecursiveMutexNew(OFPlainRecursiveMutex *rmutex)
{
int error;
pthread_mutexattr_t attr;
if ((error = pthread_mutexattr_init(&attr)) != 0)
return error;
if ((error = pthread_mutexattr_settype(&attr,
PTHREAD_MUTEX_RECURSIVE)) != 0)
return error;
if ((error = pthread_mutex_init(rmutex, &attr)) != 0)
return error;
if ((error = pthread_mutexattr_destroy(&attr)) != 0)
return error;
return 0;
}
int
OFPlainRecursiveMutexLock(OFPlainRecursiveMutex *rmutex)
{
return OFPlainMutexLock(rmutex);
}
int
OFPlainRecursiveMutexTryLock(OFPlainRecursiveMutex *rmutex)
{
return OFPlainMutexTryLock(rmutex);
}
int
OFPlainRecursiveMutexUnlock(OFPlainRecursiveMutex *rmutex)
{
return OFPlainMutexUnlock(rmutex);
}
int
OFPlainRecursiveMutexFree(OFPlainRecursiveMutex *rmutex)
{
return OFPlainMutexFree(rmutex);
}
#else
int
OFPlainRecursiveMutexNew(OFPlainRecursiveMutex *rmutex)
{
int error;
if ((error = OFPlainMutexNew(&rmutex->mutex)) != 0)
return error;
if ((error = OFTLSKeyNew(&rmutex->count)) != 0)
return error;
return 0;
}
int
OFPlainRecursiveMutexLock(OFPlainRecursiveMutex *rmutex)
{
uintptr_t count = (uintptr_t)OFTLSKeyGet(rmutex->count);
int error;
if (count > 0) {
if ((error = OFTLSKeySet(rmutex->count,
(void *)(count + 1))) != 0)
return error;
return 0;
}
if ((error = OFPlainMutexLock(&rmutex->mutex)) != 0)
return error;
if ((error = OFTLSKeySet(rmutex->count, (void *)1)) != 0) {
OFPlainMutexUnlock(&rmutex->mutex);
return error;
}
return 0;
}
int
OFPlainRecursiveMutexTryLock(OFPlainRecursiveMutex *rmutex)
{
uintptr_t count = (uintptr_t)OFTLSKeyGet(rmutex->count);
int error;
if (count > 0) {
if ((error = OFTLSKeySet(rmutex->count,
(void *)(count + 1))) != 0)
return error;
return 0;
}
if ((error = OFPlainMutexTryLock(&rmutex->mutex)) != 0)
return error;
if ((error = OFTLSKeySet(rmutex->count, (void *)1)) != 0) {
OFPlainMutexUnlock(&rmutex->mutex);
return error;
}
return 0;
}
int
OFPlainRecursiveMutexUnlock(OFPlainRecursiveMutex *rmutex)
{
uintptr_t count = (uintptr_t)OFTLSKeyGet(rmutex->count);
int error;
if (count > 1) {
if ((error = OFTLSKeySet(rmutex->count,
(void *)(count - 1))) != 0)
return error;
return 0;
}
if ((error = OFTLSKeySet(rmutex->count, (void *)0)) != 0)
return error;
if ((error = OFPlainMutexUnlock(&rmutex->mutex)) != 0)
return error;
return 0;
}
int
OFPlainRecursiveMutexFree(OFPlainRecursiveMutex *rmutex)
{
int error;
if ((error = OFPlainMutexFree(&rmutex->mutex)) != 0)
return error;
if ((error = OFTLSKeyFree(rmutex->count)) != 0)
return error;
return 0;
}
#endif