mirror of
https://github.com/opencv/opencv.git
synced 2024-12-23 16:08:00 +08:00
111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
///////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (c) 2005, Industrial Light & Magic, a division of Lucas
|
|
// Digital Ltd. LLC
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following disclaimer
|
|
// in the documentation and/or other materials provided with the
|
|
// distribution.
|
|
// * Neither the name of Industrial Light & Magic nor the names of
|
|
// its contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef INCLUDED_ILM_THREAD_SEMAPHORE_H
|
|
#define INCLUDED_ILM_THREAD_SEMAPHORE_H
|
|
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// class Semaphore -- a wrapper class for
|
|
// system-dependent counting semaphores
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include "IlmBaseConfig.h"
|
|
|
|
#if defined _WIN32 || defined _WIN64
|
|
#ifdef NOMINMAX
|
|
#undef NOMINMAX
|
|
#endif
|
|
#define NOMINMAX
|
|
#include <windows.h>
|
|
#elif HAVE_PTHREAD && !HAVE_POSIX_SEMAPHORES
|
|
#include <pthread.h>
|
|
#elif HAVE_PTHREAD && HAVE_POSIX_SEMAPHORES
|
|
#include <semaphore.h>
|
|
#endif
|
|
|
|
namespace IlmThread {
|
|
|
|
|
|
class Semaphore
|
|
{
|
|
public:
|
|
|
|
Semaphore (unsigned int value = 0);
|
|
virtual ~Semaphore();
|
|
|
|
void wait();
|
|
bool tryWait();
|
|
void post();
|
|
int value() const;
|
|
|
|
private:
|
|
|
|
#if defined _WIN32 || defined _WIN64
|
|
|
|
mutable HANDLE _semaphore;
|
|
|
|
#elif HAVE_PTHREAD && !HAVE_POSIX_SEMAPHORES
|
|
|
|
//
|
|
// If the platform has Posix threads but no semapohores,
|
|
// then we implement them ourselves using condition variables
|
|
//
|
|
|
|
struct sema_t
|
|
{
|
|
unsigned int count;
|
|
unsigned long numWaiting;
|
|
pthread_mutex_t mutex;
|
|
pthread_cond_t nonZero;
|
|
};
|
|
|
|
mutable sema_t _semaphore;
|
|
|
|
#elif HAVE_PTHREAD && HAVE_POSIX_SEMAPHORES
|
|
|
|
mutable sem_t _semaphore;
|
|
|
|
#endif
|
|
|
|
void operator = (const Semaphore& s); // not implemented
|
|
Semaphore (const Semaphore& s); // not implemented
|
|
};
|
|
|
|
|
|
} // namespace IlmThread
|
|
|
|
#endif
|