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/* -*-c++-*- OpenThreads library, Copyright (C) 2002 - 2007 The Open Thread Group
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
//
// Mutex - C++ mutex class
// ~~~~~
//
#ifndef _OPENTHREADS_MUTEX_
#define _OPENTHREADS_MUTEX_
#include <OpenThreads/Exports>
namespace OpenThreads {
/**
* @class Mutex
* @brief This class provides an object-oriented thread mutex interface.
*/
class OPENTHREAD_EXPORT_DIRECTIVE Mutex {
friend class Condition;
public:
enum MutexType
{
MUTEX_NORMAL,
MUTEX_RECURSIVE
};
/**
* Constructor
*/
Mutex(MutexType type=MUTEX_NORMAL);
/**
* Destructor
*/
virtual ~Mutex();
MutexType getMutexType() const { return _mutexType; }
/**
* Lock the mutex
*
* @return 0 if normal, -1 if errno set, errno code otherwise.
*/
virtual int lock();
/**
* Unlock the mutex
*
* @return 0 if normal, -1 if errno set, errno code otherwise.
*/
virtual int unlock();
/**
* Test if mutex can be locked.
*
* @return 0 if normal, -1 if errno set, errno code otherwise.
*/
virtual int trylock();
private:
/**
* Private copy constructor, to prevent tampering.
*/
Mutex(const Mutex &/*m*/) {};
/**
* Private copy assignment, to prevent tampering.
*/
Mutex &operator=(const Mutex &/*m*/) {return *(this);};
/**
* Implementation-specific private data.
*/
void *_prvData;
MutexType _mutexType;
};
}
#endif // _OPENTHREADS_MUTEX_
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