Files
allwpilib/hal/include/HAL/cpp/Semaphore.h
Tyler Veness 74f9da9da1 artf2612: Added Python script for updating license in source files (#57)
This is a follow-up of 3cd1253. A C++ program was written to automate the license update originally. That program was translated to Python so it can be kept in the repository and run when needed. It has been tested on Windows using the standard Python 3 installation and on Linux.

The original version skipped files that had "//" at the beginning since most were files that should be excluded. The relevant files are now in an exclusion list and the rest are processed normally. The .hpp file extension has been added as well. The script rewrote CompressorJNI.cpp to remove the carriage returns from its line endings.
2016-05-25 20:23:37 -07:00

38 lines
1.1 KiB
C++

/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2016. All Rights Reserved. */
/* Open Source Software - may be modified and shared by FRC teams. The code */
/* must be accompanied by the FIRST BSD license file in the root directory of */
/* the project. */
/*----------------------------------------------------------------------------*/
#pragma once
#include <condition_variable>
#include <cstdint>
#include "HAL/cpp/priority_mutex.h"
class Semaphore {
public:
explicit Semaphore(uint32_t count = 0);
Semaphore(Semaphore&&);
Semaphore& operator=(Semaphore&&);
void give();
void take();
// @return true if semaphore was locked successfully. false if not.
bool tryTake();
static const int32_t kNoWait = 0;
static const int32_t kWaitForever = -1;
static const uint32_t kEmpty = 0;
static const uint32_t kFull = 1;
private:
priority_mutex m_mutex;
std::condition_variable_any m_condition;
uint32_t m_count = 0;
};