icl_core_thread/SemaphoreImplWin32.cpp

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// this is for emacs file handling -*- mode: c++; indent-tabs-mode: nil -*-

// -- BEGIN LICENSE BLOCK ----------------------------------------------
// This file is part of FZIs ic_workspace.
//
// This program is free software licensed under the LGPL
// (GNU LESSER GENERAL PUBLIC LICENSE Version 3).
// You can find a copy of this license in LICENSE folder in the top
// directory of the source code.
//
// © Copyright 2016 FZI Forschungszentrum Informatik, Karlsruhe, Germany
//
// -- END LICENSE BLOCK ------------------------------------------------

//----------------------------------------------------------------------
//----------------------------------------------------------------------
#include "SemaphoreImplWin32.h"

#include "Common.h"

namespace icl_core {
namespace thread {

SemaphoreImplWin32::SemaphoreImplWin32(size_t initial_value)
  : m_semaphore(0)
{
  m_semaphore = CreateSemaphore(NULL, LONG(initial_value), LONG_MAX, NULL);
}

SemaphoreImplWin32::~SemaphoreImplWin32()
{
  CloseHandle(m_semaphore);
}

void SemaphoreImplWin32::post()
{
  ReleaseSemaphore(m_semaphore, 1, NULL);
}

bool SemaphoreImplWin32::tryWait()
{
  DWORD res = WaitForSingleObject(m_semaphore, 0);
  return res == WAIT_OBJECT_0;
}

bool SemaphoreImplWin32::wait()
{
  DWORD res = WaitForSingleObject(m_semaphore, INFINITE);
  return res == WAIT_OBJECT_0;
}

bool SemaphoreImplWin32::wait(const TimeSpan& timeout)
{
  DWORD res = WaitForSingleObject(m_semaphore, DWORD(timeout.toMSec()));
  return res == WAIT_OBJECT_0;
}

bool SemaphoreImplWin32::wait(const TimeStamp& timeout)
{
  return wait(impl::getRelativeTimeout(timeout));
}

}
}