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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================//
#include "loopback_channel.h"
#include "utllinkedlist.h"
#include "iphelpers.h"
// -------------------------------------------------------------------------------- //
// CLoopbackChannel.
// -------------------------------------------------------------------------------- //
typedef struct
{
int m_Len;
unsigned char m_Data[1];
} LoopbackMsg_t;
class CLoopbackChannel : public IChannel
{
public:
virtual ~CLoopbackChannel()
{
FOR_EACH_LL( m_Messages, i )
{
free( m_Messages[i] );
}
m_Messages.Purge();
}
virtual void Release()
{
delete this;
}
virtual bool Send( const void *pData, int len )
{
const void *pChunks[1] = { pData };
int chunkLengths[1] = { len };
return SendChunks( pChunks, chunkLengths, 1 );
}
virtual bool SendChunks( void const * const *pChunks, const int *pChunkLengths, int nChunks )
{
CChunkWalker walker( pChunks, pChunkLengths, nChunks );
LoopbackMsg_t *pMsg = (LoopbackMsg_t*)malloc( sizeof( LoopbackMsg_t ) - 1 + walker.GetTotalLength() );
walker.CopyTo( pMsg->m_Data, walker.GetTotalLength() );
pMsg->m_Len = walker.GetTotalLength();
m_Messages.AddToTail( pMsg );
return true;
}
virtual bool Recv( CUtlVector<unsigned char> &data, double flTimeout )
{
int iNext = m_Messages.Head();
if ( iNext == m_Messages.InvalidIndex() )
{
return false;
}
else
{
LoopbackMsg_t *pMsg = m_Messages[iNext];
data.CopyArray( pMsg->m_Data, pMsg->m_Len );
free( pMsg );
m_Messages.Remove( iNext );
return true;
}
}
virtual bool IsConnected()
{
return true;
}
virtual void GetDisconnectReason( CUtlVector<char> &reason )
{
}
private:
CUtlLinkedList<LoopbackMsg_t*,int> m_Messages; // FIFO for messages we've sent.
};
IChannel* CreateLoopbackChannel()
{
return new CLoopbackChannel;
}
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