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45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
/********************************************************************************
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* Copyright (C) 2019 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *
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* *
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* This software is distributed under the terms of the *
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* GNU Lesser General Public Licence (LGPL) version 3, *
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* copied verbatim in the file "LICENSE" *
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********************************************************************************/
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#ifndef FAIR_MQ_TOOLS_SEMAPHORE_H
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#define FAIR_MQ_TOOLS_SEMAPHORE_H
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#include <condition_variable>
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#include <cstdint>
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#include <functional>
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#include <mutex>
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namespace fair {
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namespace mq {
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namespace tools {
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/**
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* @struct Semaphore Semaphore.h <fairmq/tools/Semaphore.h>
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* @brief A simple blocking semaphore.
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*/
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struct Semaphore
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{
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explicit Semaphore();
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explicit Semaphore(std::size_t initial_count);
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auto Wait() -> void;
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auto Signal() -> void;
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auto GetCount() -> std::size_t;
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private:
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std::size_t fCount;
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std::mutex fMutex;
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std::condition_variable fCv;
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};
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} /* namespace tools */
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} /* namespace mq */
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} /* namespace fair */
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#endif /* FAIR_MQ_TOOLS_SEMAPHORE_H */
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