mirror of https://gitee.com/bigwinds/arangodb
665 lines
21 KiB
C
665 lines
21 KiB
C
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief mutexes, locks and condition variables in posix
|
|
///
|
|
/// @file
|
|
///
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2004-2012 triagens GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// @author Dr. Frank Celler
|
|
/// @author Copyright 2011-2012, triAGENS GmbH, Cologne, Germany
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "locks.h"
|
|
|
|
#ifdef TRI_HAVE_POSIX_THREADS
|
|
|
|
#include "BasicsC/logging.h"
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- DEFINES
|
|
// -----------------------------------------------------------------------------
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- private macros
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief busy wait delay (in microseconds)
|
|
///
|
|
/// busy waiting is used if we cannot acquire a read-lock on a shared read/write
|
|
/// in case of too many concurrent lock requests. we'll wait in a busy
|
|
/// loop until we can acquire the lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#define BUSY_LOCK_DELAY (10 * 1000)
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- MUTEX
|
|
// -----------------------------------------------------------------------------
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- constructors and destructors
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief initialises a new mutex
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_InitMutex (TRI_mutex_t* mutex) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
pthread_mutexattr_t attr;
|
|
|
|
pthread_mutexattr_init(&attr);
|
|
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
|
|
|
|
assert(mutex);
|
|
pthread_mutex_init(mutex, &attr);
|
|
#else
|
|
pthread_mutex_init(mutex, 0);
|
|
#endif
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destroys a mutex
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_DestroyMutex (TRI_mutex_t* mutex) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(mutex);
|
|
#endif
|
|
pthread_mutex_destroy(mutex);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- public functions
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief locks mutex
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_LockMutex (TRI_mutex_t* mutex) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(mutex);
|
|
#endif
|
|
rc = pthread_mutex_lock(mutex);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not lock the mutex: %s", strerror(rc));
|
|
if (rc == EDEADLK) {
|
|
LOG_ERROR("mutex deadlock detected");
|
|
}
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief unlocks mutex
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_UnlockMutex (TRI_mutex_t* mutex) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(mutex);
|
|
// never LOG_XXX something here. this will cause infinite recursing (logging uses a mutex)
|
|
#endif
|
|
rc = pthread_mutex_unlock(mutex);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not release the mutex: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- SPIN
|
|
// -----------------------------------------------------------------------------
|
|
|
|
#ifdef TRI_HAVE_POSIX_SPIN
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- constructors and destructors
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief initialises a new spin-lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_InitSpin (TRI_spin_t* spinLock) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(spinLock);
|
|
#endif
|
|
pthread_spin_init(spinLock, 0);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destroys a spin-lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_DestroySpin (TRI_spin_t* spinLock) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(spinLock);
|
|
#endif
|
|
pthread_spin_destroy(spinLock);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- public functions
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief locks spin-lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_LockSpin (TRI_spin_t* spinLock) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(spinLock);
|
|
#endif
|
|
rc = pthread_spin_lock(spinLock);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not lock the spin-lock: %s", strerror(rc));
|
|
if (rc == EDEADLK) {
|
|
LOG_ERROR("spinlock deadlock detected");
|
|
}
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief unlocks spin-lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_UnlockSpin (TRI_spin_t* spinLock) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(spinLock);
|
|
#endif
|
|
rc = pthread_spin_unlock(spinLock);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not release the spin-lock: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#endif
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- READ-WRITE LOCK
|
|
// -----------------------------------------------------------------------------
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- constructors and destructors
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief initialises a new read-write lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_InitReadWriteLock (TRI_read_write_lock_t* lock) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(lock);
|
|
#endif
|
|
pthread_rwlock_init(lock, 0);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destroys a read-write lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_DestroyReadWriteLock (TRI_read_write_lock_t* lock) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(lock);
|
|
#endif
|
|
pthread_rwlock_destroy(lock);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- public functions
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief tries to read lock read-write lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool TRI_TryReadLockReadWriteLock (TRI_read_write_lock_t* lock) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(lock);
|
|
#endif
|
|
rc = pthread_rwlock_tryrdlock(lock);
|
|
|
|
return (rc == 0);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief read locks read-write lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_ReadLockReadWriteLock (TRI_read_write_lock_t* lock) {
|
|
int rc;
|
|
bool complained = false;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(lock);
|
|
#endif
|
|
|
|
again:
|
|
rc = pthread_rwlock_rdlock(lock);
|
|
|
|
if (rc != 0) {
|
|
if (rc == EAGAIN) {
|
|
// use busy waiting if we cannot acquire the read-lock in case of too many
|
|
// concurrent read locks ("resource temporarily unavailable").
|
|
// in this case we'll wait in a busy loop until we can acquire the lock
|
|
if (! complained) {
|
|
LOG_WARNING("too many read-locks on read-write lock");
|
|
complained = true;
|
|
}
|
|
usleep(BUSY_LOCK_DELAY);
|
|
#ifdef TRI_HAVE_SCHED_H
|
|
// let other threads do things
|
|
sched_yield();
|
|
#endif
|
|
|
|
// ideal use case for goto :-)
|
|
goto again;
|
|
}
|
|
|
|
LOG_ERROR("could not read-lock the read-write lock: %s", strerror(rc));
|
|
if (rc == EDEADLK) {
|
|
LOG_ERROR("rw-lock deadlock detected");
|
|
}
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief read unlocks read-write lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_ReadUnlockReadWriteLock (TRI_read_write_lock_t* lock) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(lock);
|
|
#endif
|
|
rc = pthread_rwlock_unlock(lock);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not read-unlock the read-write lock: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief write locks read-write lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_WriteLockReadWriteLock (TRI_read_write_lock_t* lock) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(lock);
|
|
#endif
|
|
rc = pthread_rwlock_wrlock(lock);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not read-lock the read-write lock: %s", strerror(rc));
|
|
if (rc == EDEADLK) {
|
|
LOG_ERROR("rw-lock deadlock detected");
|
|
}
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief write unlocks read-write lock
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_WriteUnlockReadWriteLock (TRI_read_write_lock_t* lock) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(lock);
|
|
#endif
|
|
rc = pthread_rwlock_unlock(lock);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not read-unlock the read-write lock: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- CONDITION VARIABLE
|
|
// -----------------------------------------------------------------------------
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- constructors and destructors
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief initialises a new condition variable
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_InitCondition (TRI_condition_t* cond) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
#endif
|
|
pthread_cond_init(&cond->_cond, 0);
|
|
|
|
cond->_ownMutex = true;
|
|
cond->_mutex = TRI_Allocate(TRI_CORE_MEM_ZONE, sizeof(pthread_mutex_t), false);
|
|
|
|
if (cond->_mutex == NULL) {
|
|
LOG_ERROR("could not allocate memory for condition variable mutex");
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
pthread_mutex_init(cond->_mutex, 0);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief initialises a new condition variable with existing mutex
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_Init2Condition (TRI_condition_t* cond, TRI_mutex_t* mutex) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
assert(mutex);
|
|
#endif
|
|
pthread_cond_init(&cond->_cond, 0);
|
|
|
|
cond->_ownMutex = false;
|
|
cond->_mutex = mutex;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destroys a condition variable
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_DestroyCondition (TRI_condition_t* cond) {
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
#endif
|
|
pthread_cond_destroy(&cond->_cond);
|
|
|
|
if (cond->_ownMutex) {
|
|
pthread_mutex_destroy(cond->_mutex);
|
|
TRI_Free(TRI_CORE_MEM_ZONE, cond->_mutex);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- public functions
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup Threading
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief signals a condition variable
|
|
///
|
|
/// Note that you must hold the lock.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_SignalCondition (TRI_condition_t* cond) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
#endif
|
|
rc = pthread_cond_signal(&cond->_cond);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not signal the condition: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief broad casts a condition variable
|
|
///
|
|
/// Note that you must hold the lock.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_BroadcastCondition (TRI_condition_t* cond) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
#endif
|
|
rc = pthread_cond_broadcast(&cond->_cond);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not croadcast the condition: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief waits for a signal on a condition variable
|
|
///
|
|
/// Note that you must hold the lock.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_WaitCondition (TRI_condition_t* cond) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
#endif
|
|
rc = pthread_cond_wait(&cond->_cond, cond->_mutex);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not wait for the condition: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief waits for a signal with a timeout in micro-seconds
|
|
///
|
|
/// Note that you must hold the lock.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool TRI_TimedWaitCondition (TRI_condition_t* cond, uint64_t delay) {
|
|
int rc;
|
|
struct timespec ts;
|
|
struct timeval tp;
|
|
uint64_t x, y;
|
|
|
|
rc = gettimeofday(&tp, NULL);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not get time of day for the condition: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
// Convert from timeval to timespec
|
|
ts.tv_sec = tp.tv_sec;
|
|
x = (tp.tv_usec * 1000) + (delay * 1000);
|
|
y = (x % 1000000000);
|
|
ts.tv_nsec = y;
|
|
ts.tv_sec = ts.tv_sec + ((x - y) / 1000000000);
|
|
|
|
// and wait
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
#endif
|
|
rc = pthread_cond_timedwait(&cond->_cond, cond->_mutex, &ts);
|
|
|
|
if (rc != 0) {
|
|
if (rc == ETIMEDOUT) {
|
|
return false;
|
|
}
|
|
|
|
LOG_ERROR("could not wait for the condition: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief locks the mutex of a condition variable
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_LockCondition (TRI_condition_t* cond) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
#endif
|
|
rc = pthread_mutex_lock(cond->_mutex);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not lock the condition: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief unlocks the mutex of a condition variable
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_UnlockCondition (TRI_condition_t* cond) {
|
|
int rc;
|
|
|
|
#ifdef TRI_ENABLE_LOCK_CHECK
|
|
assert(cond);
|
|
#endif
|
|
rc = pthread_mutex_unlock(cond->_mutex);
|
|
|
|
if (rc != 0) {
|
|
LOG_ERROR("could not unlock the condition: %s", strerror(rc));
|
|
TRI_FlushLogging();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#endif
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
|
|
// End:
|