//------------------------------------------------------------------------------
//	Copyright (c) 2001-2002, OpenBeOS
//
//	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.
//
//	File Name:		LinkMsgSender.h
//	Author:			DarkWyrm <bpmagic@columbus.rr.com>
//					Pahtz <pahtz@yahoo.com.au>
//	Description:	Class for sending low-overhead port-based messaging
//  
//------------------------------------------------------------------------------
#ifndef LINKMSGSENDER_H
#define LINKMSGSENDER_H

#include <OS.h>

class LinkMsgSender
{
public:
	LinkMsgSender(port_id sendport);
	virtual ~LinkMsgSender(void);

	status_t StartMessage(int32 code);
	void CancelMessage(void);
	status_t EndMessage(void);

	status_t Flush(bigtime_t timeout = B_INFINITE_TIMEOUT);
	
	// see BPrivate::BAppServerLink which inherits from BPortLink
	//status_t FlushWithReply(int32 *code);

	void SetPort(port_id port);
	port_id	GetPort();

	status_t Attach(const void *data, ssize_t size);
	status_t AttachString(const char *string);
	template <class Type> status_t Attach(const Type& data)
	{
		return Attach(&data, sizeof(Type));
	}

protected:
	status_t FlushCompleted(ssize_t newbuffersize);
	status_t AdjustReplyBuffer(bigtime_t timeout);
	void ResetReplyBuffer();
	
	port_id	fSendPort;

	char	*fSendBuffer;

	int32	fSendPosition;	//current append position

	int32	fSendStart;	//start of current message
	
	int32	fSendBufferSize;

	int32	fSendCount;	//number of completed messages in buffer

	int32	fDataSize;	//size of data in recv buffer
	int32	fReplySize;	//size of current reply message
	
	status_t fWriteError;	//Attach failed for current message
};


#endif