mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-19 04:57:53 +00:00
98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
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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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ZT_BINARYSEMAPHORE_HPP
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#define ZT_BINARYSEMAPHORE_HPP
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "Constants.hpp"
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#include "NonCopyable.hpp"
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#ifdef __WINDOWS__
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#include <Windows.h>
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namespace ZeroTier {
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class BinarySemaphore : NonCopyable
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{
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public:
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BinarySemaphore() throw() { _sem = CreateSemaphore(NULL,0,1,NULL); }
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~BinarySemaphore() { CloseHandle(_sem); }
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inline void wait() { WaitForSingleObject(_sem,INFINITE); }
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inline void post() { ReleaseSemaphore(_sem,1,NULL); }
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private:
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HANDLE _sem;
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};
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} // namespace ZeroTier
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#else // !__WINDOWS__
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#include <pthread.h>
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namespace ZeroTier {
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class BinarySemaphore : NonCopyable
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{
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public:
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BinarySemaphore()
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{
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pthread_mutex_init(&_mh,(const pthread_mutexattr_t *)0);
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pthread_cond_init(&_cond,(const pthread_condattr_t *)0);
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_f = false;
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}
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~BinarySemaphore()
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{
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pthread_cond_destroy(&_cond);
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pthread_mutex_destroy(&_mh);
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}
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inline void wait()
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{
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pthread_mutex_lock(const_cast <pthread_mutex_t *>(&_mh));
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while (!_f)
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pthread_cond_wait(const_cast <pthread_cond_t *>(&_cond),const_cast <pthread_mutex_t *>(&_mh));
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_f = false;
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pthread_mutex_unlock(const_cast <pthread_mutex_t *>(&_mh));
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}
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inline void post()
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{
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pthread_mutex_lock(const_cast <pthread_mutex_t *>(&_mh));
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_f = true;
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pthread_mutex_unlock(const_cast <pthread_mutex_t *>(&_mh));
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pthread_cond_signal(const_cast <pthread_cond_t *>(&_cond));
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}
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private:
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pthread_cond_t _cond;
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pthread_mutex_t _mh;
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volatile bool _f;
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};
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} // namespace ZeroTier
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#endif // !__WINDOWS__
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#endif
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