thread_posix.h

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// Thread_POSIX.h
//
// $Id: //poco/Main/Foundation/include/Foundation/Thread_POSIX.h#5 $
//
// Definition of the ThreadImp class for POSIX Threads.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. 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.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// 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 Foundation_Thread_POSIX_INCLUDED
#define Foundation_Thread_POSIX_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef Foundation_Runnable_INCLUDED
#include "Foundation/Runnable.h"
#endif
#ifndef Foundation_SignalHandler_INCLUDED
#include "Foundation/SignalHandler.h"
#endif
#ifndef STD_PTHREAD_INCLUDED
#include <pthread.h>
#define STD_PTHREAD_INCLUDED
#endif
#if !defined(POCO_NO_SYS_SELECT_H)
#ifndef STD_SYS_SELECT_INCLUDED
#include <sys/select.h>
#define STD_SYS_SELECT_INCLUDED
#endif
#endif
#ifndef STD_ERRNO_INCLUDED
#include <errno.h>
#define STD_ERRNO_INCLUDED
#endif


Foundation_BEGIN


class Foundation_API ThreadImp
{
public:	
	enum Priority
	{
		PRIO_LOWEST_IMP,
		PRIO_LOW_IMP,
		PRIO_NORMAL_IMP,
		PRIO_HIGH_IMP,
		PRIO_HIGHEST_IMP
	};

	ThreadImp();				
	~ThreadImp();

	Runnable& targetImp() const;
	void setPriorityImp(int prio);
	int getPriorityImp() const;
	void startImp(Runnable& target);

	void joinImp();
	bool isRunningImp() const;
	static void sleepImp(long milliseconds);
	static void yieldImp();
	static ThreadImp* currentImp();

protected:
	static void* entry(void* pThread);
	static int mapPrio(int prio);

private:
	Runnable* _pTarget;
	pthread_t _thread;
	int       _prio;
	
	static pthread_key_t _currentKey;
	static bool          _haveCurrentKey;
	
#if defined(POCO_OS_FAMILY_UNIX)
	SignalHandler::JumpBufferVec _jumpBufferVec;
	friend class SignalHandler;
#endif
};


//
// inlines
//
inline int ThreadImp::getPriorityImp() const
{
	return _prio;
}


inline void ThreadImp::sleepImp(long milliseconds)
{
#if defined(__VMS) || defined(__digital__)
		// This is specific to DECThreads
		struct timespec interval;
		interval.tv_sec  = milliseconds / 1000;
		interval.tv_nsec = (milliseconds % 1000)*1000000; 
		pthread_delay_np(&interval);
#else 
		struct timeval tv;
		tv.tv_sec  = milliseconds / 1000;
		tv.tv_usec = (milliseconds % 1000) * 1000;
		select(0, NULL, NULL, NULL, &tv); 	
#endif
}


inline void ThreadImp::yieldImp()
{
	sched_yield();
}


Foundation_END


#endif // Foundation_Thread_POSIX_INCLUDED