mirror of https://github.com/aria2/aria2
115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2013 Nils Maier
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef D_LOCK_H
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#define D_LOCK_H
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#if defined(_WIN32)
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#include <windows.h>
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#elif defined(ENABLE_PTHREAD)
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#include <pthread.h>
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#endif
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namespace aria2 {
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class Lock {
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private:
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#if defined(_WIN32)
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::CRITICAL_SECTION section_;
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#elif defined(ENABLE_PTHREAD)
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::pthread_mutex_t mutex_;
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#endif
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public:
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Lock() {
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#if defined(_WIN32)
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::InitializeCriticalSection(§ion_);
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#elif defined(ENABLE_PTHREAD)
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mutex_ = PTHREAD_RECURSIVE_MUTEX_INITIALIZER;
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#endif
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}
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~Lock() {
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#if defined(_WIN32)
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::DeleteCriticalSection(§ion_);
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#elif defined(ENABLE_PTHREAD)
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::pthread_mutex_destroy(&mutex_);
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#endif
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}
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inline void aquire() {
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#if defined(_WIN32)
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::EnterCriticalSection(§ion_);
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#elif defined(ENABLE_PTHREAD)
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::pthread_mutex_lock(&mutex_);
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#endif
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}
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inline bool tryAquire() {
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#if defined(_WIN32)
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return ::TryEnterCriticalSection(§ion_) == TRUE;
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#elif defined(ENABLE_PTHREAD)
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return ::pthread_mutex_trylock(&mutex_) == 0;
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#else
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return true;
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#endif
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}
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inline void release() {
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#if defined(_WIN32)
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::LeaveCriticalSection(§ion_);
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#elif defined(ENABLE_PTHREAD)
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::pthread_mutex_unlock(&mutex_);
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#endif
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}
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};
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class LockGuard {
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private:
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Lock& lock_;
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public:
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inline LockGuard(Lock& lock) : lock_(lock) {
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lock_.aquire();
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}
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inline ~LockGuard() {
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lock_.release();
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}
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};
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} // namespace aria2
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#endif // D_LOCK_H
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