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Diffstat (limited to 'extern/audaspace/include/util/Barrier.h')
-rw-r--r-- | extern/audaspace/include/util/Barrier.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/extern/audaspace/include/util/Barrier.h b/extern/audaspace/include/util/Barrier.h new file mode 100644 index 00000000000..d9e8bf07f82 --- /dev/null +++ b/extern/audaspace/include/util/Barrier.h @@ -0,0 +1,78 @@ +/******************************************************************************* +* Copyright 2015-2016 Juan Francisco Crespo Galán +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +******************************************************************************/ + +#pragma once + +/** +* @file Barrier.h +* @ingroup util +* The Barrier class. +*/ + +#include "Audaspace.h" + +#include <mutex> +#include <condition_variable> + +AUD_NAMESPACE_BEGIN +/** +* This represents a barrier mechanism for thread sychronization. +*/ +class Barrier +{ +private: + /** + * A mutex needed to use a condition variable. + */ + std::mutex m_mutex; + + /** + * Condition varieble used to sync threads. + */ + std::condition_variable m_condition; + + /** + * Number of threads that need to reach the barrier for it to lift. + */ + unsigned int m_threshold; + + /** + * Conter that count from threshold to 0. + */ + unsigned int m_count; + + /** + * Variable used for predicate check in the condition variable wait. + */ + unsigned int m_generation; + + // delete copy constructor and operator= + Barrier(const Barrier&) = delete; + Barrier& operator=(const Barrier&) = delete; +public: + /** + * Creates a new Barrier object. + * \param count the number of threads that need to reach the barrier for it to lift. + */ + Barrier(unsigned int count); + virtual ~Barrier(); + + /** + * Makes the caller thread wait until enough threads are stopped by this method. + */ + void wait(); +}; +AUD_NAMESPACE_END
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