mirror of
https://github.com/wpilibsuite/allwpilib
synced 2026-06-19 00:41:43 +00:00
2c94d0ba2f
Replaced all uses of built-in types except char with stdint.h typedefs and all unsigned types with signed in the HAL
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) FIRST 2016. All Rights Reserved. */
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/* Open Source Software - may be modified and shared by FRC teams. The code */
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/* must be accompanied by the FIRST BSD license file in the root directory of */
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/* the project. */
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/*----------------------------------------------------------------------------*/
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#pragma once
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#include <stdint.h>
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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(int32_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 int32_t kEmpty = 0;
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static const int32_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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int32_t m_count = 0;
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};
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