73 lines
1.6 KiB
C++
73 lines
1.6 KiB
C++
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// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2018, Parallax Software, Inc.
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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 <https://www.gnu.org/licenses/>.
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#ifndef STA_MUTEX_H
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#define STA_MUTEX_H
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#include <errno.h>
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#include "Pthread.hh"
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#include "DisallowCopyAssign.hh"
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#include "ThreadException.hh"
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namespace sta {
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// C++ wrapper/facade for pthread_mutex_t.
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class Mutex
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{
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public:
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Mutex();
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~Mutex();
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void lock();
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bool trylock();
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void unlock();
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private:
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DISALLOW_COPY_AND_ASSIGN(Mutex);
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pthread_mutex_t mutex_;
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friend class Condition;
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};
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inline void
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Mutex::lock()
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{
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int error = pthread_mutex_lock(&mutex_);
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CheckThreadError(error);
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}
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// Return true if lock is successful.
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inline bool
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Mutex::trylock()
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{
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int error = pthread_mutex_trylock(&mutex_);
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if (error == 0)
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return true;
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else if (error != EBUSY)
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throw ThreadException(__FILE__, __LINE__, error);
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return false;
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}
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inline void
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Mutex::unlock()
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{
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int error = pthread_mutex_unlock(&mutex_);
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CheckThreadError(error);
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}
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} // namespace
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#endif
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