Laurent Morichetti
011f3e945b
Change-Id: Id3b833d405596735becb3346f3b08c6da57033fe
[ROCm/clr commit: 20c7173849]
62 lines
1.1 KiB
C++
62 lines
1.1 KiB
C++
//
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// Copyright (c) 2008,2010 Advanced Micro Devices, Inc. All rights reserved.
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//
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#ifndef SEMAPHORE_HPP_
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#define SEMAPHORE_HPP_
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#include "top.hpp"
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#include "utils/util.hpp"
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#include <atomic>
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#if defined(__linux__)
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#include <semaphore.h>
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#endif /*linux*/
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namespace amd {
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/*! \addtogroup Threads
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* @{
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*
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* \addtogroup Synchronization
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* @{
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*/
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class Thread;
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//! \brief Counting semaphore
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class Semaphore : public HeapObject {
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private:
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std::atomic_int state_; //!< This semaphore's value.
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#ifdef _WIN32
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void* handle_; //!< The semaphore object's handle.
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char padding_[64 - sizeof(void*) - sizeof(std::atomic_int)];
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#else // !_WIN32
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sem_t sem_; //!< The semaphore object's identifier.
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char padding_[64 - sizeof(sem_t) - sizeof(std::atomic_int)];
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#endif /*!_WIN32*/
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public:
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Semaphore();
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~Semaphore();
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//! \brief Decrement this semaphore
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void wait();
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//! \brief Increment this semaphore
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void post();
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//! \brief Reset this semaphore.
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void reset() { state_.store(0, std::memory_order_release); }
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};
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/*! @}
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* @}
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*/
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} // namespace amd
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#endif /*SEMAPHORE_HPP_*/
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