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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _MEDIATOR_HXX
#define _MEDIATOR_HXX
#include <string.h>
#include <stdarg.h>
#include <tools/string.hxx>
#include <tools/link.hxx>
#include <vos/pipe.hxx>
#include <vos/mutex.hxx>
#include <vos/conditn.hxx>
#include <osl/thread.hxx>
#if OSL_DEBUG_LEVEL > 1
#include <stdio.h>
#endif
#include <vector>
struct MediatorMessage
{
ULONG m_nID;
ULONG m_nBytes;
char* m_pBytes;
char* m_pRun;
MediatorMessage() : m_nID( 0 ), m_nBytes( 0 ),
m_pBytes( NULL ), m_pRun( NULL ) {}
MediatorMessage( ULONG nID, ULONG nBytes, char* pBytes ) :
m_nID( nID ),m_nBytes( nBytes ), m_pRun( NULL )
{
m_pBytes = new char[ m_nBytes ];
memcpy( m_pBytes, pBytes, (size_t)m_nBytes );
}
~MediatorMessage()
{
if( m_pBytes )
delete [] m_pBytes;
}
void Set( ULONG nBytes, char* pBytes )
{
if( m_pBytes )
delete [] m_pBytes;
m_nBytes = nBytes;
m_pBytes = new char[ m_nBytes ];
memcpy( m_pBytes, pBytes, (size_t)m_nBytes );
}
ULONG ExtractULONG();
char* GetString();
UINT32 GetUINT32();
void* GetBytes( ULONG& );
void* GetBytes() { ULONG nBytes; return GetBytes( nBytes ); }
void Rewind() { m_pRun = NULL; }
};
class MediatorListener;
class Mediator
{
friend class MediatorListener;
protected:
int m_nSocket;
std::vector<MediatorMessage*> m_aMessageQueue;
NAMESPACE_VOS(OMutex) m_aQueueMutex;
NAMESPACE_VOS(OMutex) m_aSendMutex;
// only one thread can send a message at any given time
NAMESPACE_VOS(OCondition) m_aNewMessageCdtn;
MediatorListener* m_pListener;
// thread to fill the queue
ULONG m_nCurrentID;
// will be constantly increased with each message sent
bool m_bValid;
Link m_aConnectionLostHdl;
Link m_aNewMessageHdl;
public:
Mediator( int nSocket );
~Mediator();
// mark mediator as invalid. No more messages will be processed,
// SendMessage, WaitForMessage, TransactMessage will return immediatly
// with error
void invalidate() { m_bValid = false; }
ULONG SendMessage( ULONG nBytes, const char* pBytes, ULONG nMessageID = 0 );
ULONG SendMessage( const ByteString& rMessage, ULONG nMessageID = 0 )
{
return SendMessage( rMessage.Len(), rMessage.GetBuffer(), nMessageID );
}
BOOL WaitForMessage( ULONG nTimeOut = 5000 );
// timeout in ms
// TRUE: Message came in
// FALSE: timed out
// if timeout is set, WaitForMessage will wait even if there are messages
// in the queue
virtual MediatorMessage* WaitForAnswer( ULONG nMessageID );
// wait for an answer message ( ID >= 1 << 24 )
// the message will be removed from the queue and returned
MediatorMessage* TransactMessage( ULONG nBytes, char* pBytes );
// sends a message and waits for an answer
MediatorMessage* GetNextMessage( BOOL bWait = FALSE );
Link SetConnectionLostHdl( const Link& rLink )
{
Link aRet = m_aConnectionLostHdl;
m_aConnectionLostHdl = rLink;
return aRet;
}
Link SetNewMessageHdl( const Link& rLink )
{
Link aRet = m_aNewMessageHdl;
m_aNewMessageHdl = rLink;
return aRet;
}
};
class MediatorListener : public osl::Thread
{
friend class Mediator;
private:
Mediator* m_pMediator;
::vos::OMutex m_aMutex;
MediatorListener( Mediator* );
~MediatorListener();
virtual void run();
virtual void onTerminated();
};
inline void medDebug( int condition, const char* pFormat, ... )
{
#if OSL_DEBUG_LEVEL > 1
if( condition )
{
va_list ap;
va_start( ap, pFormat );
vfprintf( stderr, pFormat, ap );
va_end( ap );
}
#else
(void)condition;
(void)pFormat;
#endif
}
#endif // _MEDIATOR_HXX
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