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https://github.com/wpilibsuite/allwpilib
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31 lines
611 B
C++
31 lines
611 B
C++
#pragma once
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#include <cstdint>
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#include <condition_variable>
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#include "HAL/cpp/priority_mutex.h"
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class Semaphore {
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public:
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explicit Semaphore(uint32_t count = 0);
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Semaphore(Semaphore&&);
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Semaphore& operator=(Semaphore&&);
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void give();
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void take();
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// @return true if semaphore was locked successfully. false if not.
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bool tryTake();
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static const int32_t kNoWait = 0;
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static const int32_t kWaitForever = -1;
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static const uint32_t kEmpty = 0;
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static const uint32_t kFull = 1;
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private:
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priority_mutex m_mutex;
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std::condition_variable_any m_condition;
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uint32_t m_count = 0;
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};
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