mirror of
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a89752dfe7
git-svn-id: http://encfs.googlecode.com/svn/trunk@121 db9cf616-1c43-0410-9cb8-a902689de0d6
87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
/*****************************************************************************
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* Author: Valient Gough <vgough@pobox.com>
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*
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*****************************************************************************
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* Copyright (c) 2003, Valient Gough
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _Mutex_incl_
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#define _Mutex_incl_
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#include "base/config.h"
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#ifdef CMAKE_USE_PTHREADS_INIT
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#include <pthread.h>
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#else
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#warning No thread support.
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#endif
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namespace encfs {
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class Mutex {
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public:
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#ifdef CMAKE_USE_PTHREADS_INIT
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pthread_mutex_t _mutex;
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Mutex() { pthread_mutex_init(&_mutex, 0); }
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~Mutex() { pthread_mutex_destroy(&_mutex); }
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#endif
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void lock();
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void unlock();
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};
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class Lock {
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public:
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explicit Lock(Mutex &mutex);
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~Lock();
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// leave the lock as it is. When the Lock wrapper is destroyed, it
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// will do nothing with the pthread mutex.
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void leave();
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private:
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Lock(const Lock &src); // not allowed
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Lock &operator=(const Lock &src); // not allowed
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Mutex *_mutex;
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};
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inline void Mutex::lock() {
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#ifdef CMAKE_USE_PTHREADS_INIT
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pthread_mutex_lock(&_mutex);
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#endif
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}
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inline void Mutex::unlock() {
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#ifdef CMAKE_USE_PTHREADS_INIT
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pthread_mutex_unlock(&_mutex);
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#endif
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}
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inline Lock::Lock(Mutex &mutex) : _mutex(&mutex) {
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if (_mutex) _mutex->lock();
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}
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inline Lock::~Lock() {
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if (_mutex) _mutex->unlock();
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}
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inline void Lock::leave() { _mutex = NULL; }
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} // namespace encfs
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#endif
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