/usr/include/zthread/PriorityMutex.h is in libzthread-dev 2.3.2-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2005, Eric Crahen
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef __ZTPRIORITYMUTEX_H__
#define __ZTPRIORITYMUTEX_H__
#include "zthread/Lockable.h"
#include "zthread/NonCopyable.h"
namespace ZThread {
class PriorityMutexImpl;
/**
* @class PriorityMutex
* @author Eric Crahen <http://www.code-foo.com>
* @date <2003-07-16T17:35:46-0400>
* @version 2.2.1
*
* A PriorityMutex is similar to a Mutex, with exception that a PriorityMutex
* has a difference scheduling policy. It is a non-reentrant, priority sensitive
* MUTual EXclusion Lockable object.
*
* @see Mutex
*
* <b>Scheduling</b>
*
* Threads competing to acquire() a Mutex are granted access in order of priority. Threads
* with a higher priority will be given access first.
*/
class ZTHREAD_API PriorityMutex : public Lockable, private NonCopyable {
PriorityMutexImpl* _impl;
public:
/**
* @see Mutex::Mutex()
*/
PriorityMutex();
/**
* @see Mutex::~Mutex()
*/
virtual ~PriorityMutex();
/**
* @see Mutex::acquire()
*/
virtual void acquire();
/**
* @see Mutex::tryAcquire(unsigned long timeout)
*/
virtual bool tryAcquire(unsigned long timeout);
/**
* @see Mutex::release()
*/
virtual void release();
};
} // namespace ZThread
#endif // __ZTPRIORITYMUTEX_H__
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