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https://github.com/wpilibsuite/allwpilib
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69d9ad70ab
This is the changes made by Patrick Plenefisch converting the native code to use CMake and the CMake Maven Plugin, as opposed to the native Maven plugin. This is to allow for compatibility with newer versions of the GCC toolchain. All the cpp sources were moved from maven style directories to cpp style directories for CMake. Change-Id: I67f5e3608948f37c83b0990d232105a3784f8593
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) FIRST 2008. 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 $(WIND_BASE)/WPILib. */
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/*----------------------------------------------------------------------------*/
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#include "HAL/cpp/Synchronized.h"
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#include "HAL/Semaphore.h"
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/**
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* Synchronized class deals with critical regions.
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* Declare a Synchronized object at the beginning of a block. That will take the semaphore.
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* When the code exits from the block it will call the destructor which will give the semaphore.
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* This ensures that no matter how the block is exited, the semaphore will always be released.
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* Use the CRITICAL_REGION(SEM_ID) and END_REGION macros to make the code look cleaner (see header file)
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* @param semaphore The semaphore controlling this critical region.
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*/
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Synchronized::Synchronized(MUTEX_ID semaphore)
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{
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m_mutex = semaphore;
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m_semaphore = NULL;
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takeMutex(m_mutex);
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}
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Synchronized::Synchronized(SEMAPHORE_ID semaphore)
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{
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m_mutex = NULL;
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m_semaphore = semaphore;
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takeSemaphore(m_semaphore);
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}
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Synchronized::Synchronized(ReentrantSemaphore& semaphore)
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{
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m_mutex = semaphore.m_semaphore;
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m_semaphore = NULL;
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takeMutex(m_mutex);
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}
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/**
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* This destructor unlocks the semaphore.
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*/
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Synchronized::~Synchronized()
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{
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if (m_mutex != NULL) {
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giveMutex(m_mutex);
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} else {
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giveSemaphore(m_semaphore);
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}
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}
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