79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
/*
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* s3fs - FUSE-based file system backed by Amazon S3
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*
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* Copyright(C) 2007 Takeshi Nakatani <ggtakec.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <cstdlib>
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#include <cerrno>
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#include "autolock.h"
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#include "s3fs_logger.h"
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//-------------------------------------------------------------------
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// Class AutoLock
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//-------------------------------------------------------------------
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AutoLock::AutoLock(pthread_mutex_t* pmutex, Type type) : auto_mutex(pmutex)
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{
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if (type == ALREADY_LOCKED) {
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is_lock_acquired = false;
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} else if (type == NO_WAIT) {
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int result = pthread_mutex_trylock(auto_mutex);
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if(result == 0){
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is_lock_acquired = true;
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}else if(result == EBUSY){
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is_lock_acquired = false;
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}else{
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S3FS_PRN_CRIT("pthread_mutex_trylock returned: %d", result);
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abort();
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}
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} else {
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int result = pthread_mutex_lock(auto_mutex);
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if(result == 0){
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is_lock_acquired = true;
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}else{
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S3FS_PRN_CRIT("pthread_mutex_lock returned: %d", result);
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abort();
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}
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}
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}
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bool AutoLock::isLockAcquired() const
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{
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return is_lock_acquired;
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}
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AutoLock::~AutoLock()
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{
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if (is_lock_acquired) {
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int result = pthread_mutex_unlock(auto_mutex);
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if(result != 0){
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S3FS_PRN_CRIT("pthread_mutex_unlock returned: %d", result);
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abort();
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}
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}
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: expandtab sw=4 ts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4
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*/
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