2011-04-22 14:26:36 -07:00
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/* EINA - EFL data type library
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* Copyright (C) 2011 Vincent Torri
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef EINA_INLINE_LOCK_POSIX_X_
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#define EINA_INLINE_LOCK_POSIX_X_
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2011-05-01 06:24:08 -07:00
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#include <errno.h>
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2011-04-24 19:30:42 -07:00
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#ifndef __USE_UNIX98
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# define __USE_UNIX98
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# include <pthread.h>
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2011-04-25 01:48:20 -07:00
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# undef __USE_UNIX98
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2011-04-24 19:30:42 -07:00
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#else
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# include <pthread.h>
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#endif
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2011-04-22 14:26:36 -07:00
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2011-05-01 06:24:08 -07:00
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/*
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#define EINA_LOCK_DEBUG 1
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*/
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#ifdef EINA_LOCK_DEBUG
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#include <execinfo.h>
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#define EINA_LOCK_DEBUG_BT_NUM 64
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typedef void (*Eina_Lock_Bt_Func) ();
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#endif
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typedef struct _Eina_Lock Eina_Lock;
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struct _Eina_Lock
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{
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pthread_mutex_t mutex;
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#ifdef EINA_LOCK_DEBUG
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pthread_t lock_thread_id;
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Eina_Lock_Bt_Func lock_bt[EINA_LOCK_DEBUG_BT_NUM];
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int lock_bt_num;
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Eina_Bool locked : 1;
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#endif
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};
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2011-04-22 14:26:36 -07:00
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2011-05-02 01:24:06 -07:00
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#ifdef EINA_LOCK_DEBUG
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# define EINA_LOCK_INITIALIZER { PTHREAD_MUTEX_INITIALIZER, 0, { 0 }, 0, 0 }
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#else
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# define EINA_LOCK_INITIALIZER { PTHREAD_MUTEX_INITIALIZER }
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#endif
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typedef enum
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{
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EINA_LOCK_FAIL = EINA_FALSE,
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EINA_LOCK_SUCCEED = EINA_TRUE,
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EINA_LOCK_DEADLOCK
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} Eina_Lock_Result;
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2011-04-24 13:22:17 -07:00
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EAPI extern Eina_Bool _eina_threads_activated;
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#ifdef EINA_HAVE_DEBUG_THREADS
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# include <sys/time.h>
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EAPI extern int _eina_threads_debug;
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#endif
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2011-04-24 08:54:09 -07:00
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2011-05-02 01:24:06 -07:00
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static inline Eina_Lock_Result
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2011-04-22 14:26:36 -07:00
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eina_lock_new(Eina_Lock *mutex)
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{
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2011-04-24 13:22:17 -07:00
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pthread_mutexattr_t attr;
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if (pthread_mutexattr_init(&attr) != 0)
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return EINA_FALSE;
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2011-05-01 06:24:08 -07:00
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/* use errorcheck locks. detect deadlocks.
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2011-04-25 01:48:20 -07:00
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#ifdef PTHREAD_MUTEX_RECURSIVE
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2011-04-24 13:22:17 -07:00
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if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) != 0)
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return EINA_FALSE;
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2011-04-25 01:48:20 -07:00
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#endif
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2011-05-01 06:24:08 -07:00
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*/
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if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK) != 0)
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return EINA_FALSE;
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#ifdef EINA_LOCK_DEBUG
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memset(mutex, 0, sizeof(Eina_Lock));
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#endif
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if (pthread_mutex_init(&(mutex->mutex), &attr) != 0)
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2011-04-24 13:22:17 -07:00
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return EINA_FALSE;
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pthread_mutexattr_destroy(&attr);
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return EINA_TRUE;
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2011-04-22 14:26:36 -07:00
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}
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static inline void
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2011-04-24 09:49:48 -07:00
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eina_lock_free(Eina_Lock *mutex)
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2011-04-22 14:26:36 -07:00
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{
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2011-05-01 06:24:08 -07:00
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pthread_mutex_destroy(&(mutex->mutex));
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#ifdef EINA_LOCK_DEBUG
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memset(mutex, 0, sizeof(Eina_Lock));
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#endif
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2011-04-22 14:26:36 -07:00
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}
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2011-05-02 01:24:06 -07:00
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static inline Eina_Lock_Result
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2011-04-24 09:49:48 -07:00
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eina_lock_take(Eina_Lock *mutex)
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2011-04-22 14:26:36 -07:00
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{
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2011-05-01 06:24:08 -07:00
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Eina_Bool ret;
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2011-04-24 13:22:17 -07:00
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#ifdef EINA_HAVE_DEBUG_THREADS
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2011-05-01 06:24:08 -07:00
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if (_eina_threads_debug)
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{
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struct timeval t0, t1;
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int dt;
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gettimeofday(&t0, NULL);
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pthread_mutex_lock(&(x));
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gettimeofday(&t1, NULL);
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dt = (t1.tv_sec - t0.tv_sec) * 1000000;
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if (t1.tv_usec > t0.tv_usec)
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dt += (t1.tv_usec - t0.tv_usec);
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else
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dt -= t0.tv_usec - t1.tv_usec;
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dt /= 1000;
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if (dt > _eina_threads_debug) abort();
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}
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2011-04-24 13:22:17 -07:00
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#endif
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2011-05-01 06:24:08 -07:00
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ret = (pthread_mutex_lock(&(mutex->mutex)) == 0) ?
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EINA_TRUE : EINA_FALSE;
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#ifdef EINA_LOCK_DEBUG
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mutex->locked = 1;
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mutex->lock_thread_id = pthread_self();
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mutex->lock_bt_num = backtrace((void **)(mutex->lock_bt), EINA_LOCK_DEBUG_BT_NUM);
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#endif
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return ret;
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2011-04-22 14:26:36 -07:00
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}
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2011-05-02 01:24:06 -07:00
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static inline Eina_Lock_Result
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2011-04-24 09:49:48 -07:00
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eina_lock_take_try(Eina_Lock *mutex)
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2011-04-22 14:26:36 -07:00
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{
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2011-05-01 06:24:08 -07:00
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Eina_Bool ret = EINA_FALSE;
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int ok;
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ok = pthread_mutex_trylock(&(mutex->mutex));
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if (ok == 0) ret = EINA_TRUE;
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else if (ok == EDEADLK)
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{
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printf("ERROR ERROR: DEADLOCK on lock %p\n", mutex);
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2011-05-02 01:24:06 -07:00
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ret = EINA_LOCK_DEADLOCK; // magic
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2011-05-01 06:24:08 -07:00
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}
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#ifdef EINA_LOCK_DEBUG
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if (ret == EINA_TRUE)
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{
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mutex->locked = 1;
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mutex->lock_thread_id = pthread_self();
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mutex->lock_bt_num = backtrace((void **)(mutex->lock_bt), EINA_LOCK_DEBUG_BT_NUM);
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}
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#endif
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return ret;
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2011-04-22 14:26:36 -07:00
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}
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2011-05-02 01:24:06 -07:00
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static inline Eina_Lock_Result
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2011-04-24 09:49:48 -07:00
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eina_lock_release(Eina_Lock *mutex)
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2011-04-22 14:26:36 -07:00
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{
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2011-05-01 06:24:08 -07:00
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Eina_Bool ret;
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#ifdef EINA_LOCK_DEBUG
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mutex->locked = 0;
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mutex->lock_thread_id = 0;
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memset(mutex->lock_bt, 0, EINA_LOCK_DEBUG_BT_NUM * sizeof(Eina_Lock_Bt_Func));
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mutex->lock_bt_num = 0;
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#endif
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ret = (pthread_mutex_unlock(&(mutex->mutex)) == 0) ?
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EINA_TRUE : EINA_FALSE;
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return ret;
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}
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static inline void
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eina_lock_debug(Eina_Lock *mutex)
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{
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#ifdef EINA_LOCK_DEBUG
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printf("lock %p, locked: %i, by %i\n",
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mutex, (int)mutex->locked, (int)mutex->lock_thread_id);
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backtrace_symbols_fd((void **)mutex->lock_bt, mutex->lock_bt_num, 1);
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#else
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mutex = 0;
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#endif
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2011-04-22 14:26:36 -07:00
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}
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#endif
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