bthread.h

封装了brew的最新多线程接口的类,对学习BREW程序的有很大帮助

/*
 * Copyright (C) 2003 Radu Braniste ([e-mail])
 * 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. Neither the name of the Author 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 AUTHOR 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 AUTHOR 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 _brewthread_h_
#define _brewthread_h_

#include "AEEThreadUtil.h"
#include "AEERScPool.h"

struct BThreadPolicy
{
	static int getStackSize()
	{
		return 100;
	}
};


template <class R, class P = BThreadPolicy>
class BThread 
{
public:	
	~BThread()
	{
		//int err = IRSCPOOL_ReleaseRsc(pool_,(IBase*)thread_);
		//if (thread_)
		//	ITHREAD_Release(thread_);
	}

	static BThread* createThread(IShell* shell, IRscPool *rsc, Writer* writer=0)
	{
		void* v = IRSCPOOL_Malloc(rsc,sizeof(BThread<R>));
		BThread<R>* bthread = new(v) BThread<R>(shell, rsc, writer);
		if (bthread->allocate()!= SUCCESS)
		{
			IRSCPOOL_Free(rsc,v);
			bthread->deallocate();
			return 0;
		}
		return bthread;
	}

	int start()
	{
		return ITHREAD_Start(thread_, P::getStackSize(), runImpl, this); 
	}
	
	void sleep(int ms)
	{
		AEECallback *pcb = ITHREAD_GetResumeCBK(thread_);
		ISHELL_SetTimerEx(shell_,ms,pcb);
		ITHREAD_Suspend(thread_);
	}
	

private:
	BThread(IShell* shell, IRscPool *rsc, Writer* writer) :	
							shell_(shell), thread_(0), pool_(rsc), runnable_(0), writer_(writer)
	{
	}
	int	allocate()
	{
		int err = SUCCESS;
		if ((err  = ISHELL_CreateInstance(shell_, AEECLSID_THREAD, (void**)(&thread_))) != SUCCESS)
			return err; 
		err = IRSCPOOL_HoldRsc(pool_,(IBase*)thread_);
		void* v = ITHREAD_Malloc(thread_,sizeof(R));
		runnable_ = new(v) R(shell_, writer_);
		if (!runnable_)
			return 1;
		return err;
	}

	
	void	deallocate()
	{
		IRSCPOOL_ReleaseRsc(pool_,(IBase*)thread_);
		ITHREAD_Free(thread_,runnable_);
	}

	static int runImpl(IThread* t, void* v)
	{
		BThread* r = static_cast<BThread*>(v);
		(*(r->runnable_))(r);
		 return SUCCESS;
	}

private:
	IShell* shell_;
	IThread* thread_;
	R* runnable_;
	IRscPool* pool_;
	Writer* writer_;
private:	
	BThread( const BThread &Value );
	const BThread &operator = ( const BThread &Rhs );
};

struct RunnableImpl
{

	RunnableImpl(IShell* shell, void*) : shell_(shell), cursor_(0)
	{
	}

	void operator()(BThread<RunnableImpl>* t)
	{
		Writer writer (shell_);
		while (cursor_ < 30)
		{
			String e ((long)cursor_);
			writer.DisplayOutput(1,e.toCharArray());
			t->sleep(100);
			int i = cursor_++;
		}
	}

private:
	IShell* shell_;
	int cursor_;
};

struct RunnableImpl1
{

	RunnableImpl1(IShell* shell, Writer* writer) : shell_(shell), cursor_(0), writer_(writer)
	{
	}

	void operator()(BThread<RunnableImpl1>* t)
	{
		while (cursor_ < 30)
		{
			writer_->WriteLine(cursor_);
			t->sleep(100);
			int i = cursor_++;
		}
	}

private:
	IShell* shell_;
	int cursor_;
	Writer* writer_;
};




#endif