asyncchannel.cpp

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

//
// AsyncChannel.cpp
//
// $Id: //poco/Main/Foundation/src/AsyncChannel.cpp#5 $
//
// 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.
//


#include "Foundation/AsyncChannel.h"
#include "Foundation/Notification.h"
#include "Foundation/Message.h"
#include "Foundation/Formatter.h"
#include "Foundation/AutoPtr.h"
#include "Foundation/LoggingRegistry.h"


Foundation_BEGIN


class MessageNotification: public Notification
{
public:
	MessageNotification(const Message& msg)
	{
		_msg = msg;
	}
	
	~MessageNotification()
	{
	}
	
	const Message& message() const
	{
		return _msg;
	}
	
private:
	Message _msg;
};


AsyncChannel::AsyncChannel(Channel* pChannel): _pChannel(pChannel), _thread("AsyncChannel")
{
	if (_pChannel) _pChannel->duplicate();
}


AsyncChannel::~AsyncChannel()
{
	close();
	if (_pChannel) _pChannel->release();
}


void AsyncChannel::setChannel(Channel* pChannel)
{
	FastMutex::ScopedLock lock(_mutex);
	
	if (_pChannel) _pChannel->release();
	_pChannel = pChannel;
	if (_pChannel) _pChannel->duplicate();
}


Channel* AsyncChannel::getChannel() const
{
	return _pChannel;
}


void AsyncChannel::open()
{
	_thread.start(*this);
}


void AsyncChannel::close()
{
	if (_thread.isRunning())
	{
		while (!_queue.empty()) Thread::sleep(100);
		_queue.wakeUpAll();
		_thread.join();
	}
}


void AsyncChannel::log(const Message& msg)
{
	_queue.enqueueNotification(new MessageNotification(msg));
}


void AsyncChannel::setProperty(const std::string& name, const std::string& value)
{
	if (name == "channel")
		setChannel(LoggingRegistry::defaultRegistry().channelForName(value));
	else
		Channel::setProperty(name, value);
}


void AsyncChannel::run()
{
	AutoPtr<Notification> nf = _queue.waitDequeueNotification();
	while (nf)
	{
		MessageNotification* pNf = dynamic_cast<MessageNotification*>(nf.get());
		{
			FastMutex::ScopedLock lock(_mutex);

			if (pNf && _pChannel) _pChannel->log(pNf->message());
		}
		nf = _queue.waitDequeueNotification();
	}
}
		

Foundation_END