windows-server-2003/multimedia/directx/dplay/dplay8/sp/serial/dpnmodemsendqueue.cpp

/*==========================================================================
 *
 *  Copyright (C) 1998-2000 Microsoft Corporation.  All Rights Reserved.
 *
 *  File:       SendQueue.cpp
 *  Content:	Queue to manage outgoing sends
 *
 *
 *  History:
 *   Date		By		Reason
 *   ====		==		======
 *	06/14/99	jtk		Created
 ***************************************************************************/

#include "dnmdmi.h"


#undef DPF_MODNAME
#define	DPF_MODNAME	"SendQueue"

#undef DPF_SUBCOMP
#define DPF_SUBCOMP DN_SUBCOMP_MODEM

//**********************************************************************
// Constant definitions
//**********************************************************************

//**********************************************************************
// Macro definitions
//**********************************************************************

//**********************************************************************
// Structure definitions
//**********************************************************************

//**********************************************************************
// Variable definitions
//**********************************************************************

//**********************************************************************
// Function prototypes
//**********************************************************************

//**********************************************************************
// Function definitions
//**********************************************************************


//**********************************************************************
// ------------------------------
// CSendQueue::CSendQueue - constructor
//
// Entry:		Nothing
//
// Exit:		Nothing
//
// Notes:	Do not allocate anything in a constructor
// ------------------------------
CSendQueue::CSendQueue():
	m_pHead( NULL ),
	m_pTail( NULL )
{
}
//**********************************************************************


//**********************************************************************
// ------------------------------
// CSendQueue::~CSendQueue - destructor
//
// Entry:		Nothing
//
// Exit:		Nothing
// ------------------------------
CSendQueue::~CSendQueue()
{
	DNASSERT( m_pHead == NULL );
	DNASSERT( m_pTail == NULL );
}
//**********************************************************************


//**********************************************************************
// ------------------------------
// CSendQueue::Initialize - initialize this send queue
//
// Entry:		Nothing
//
// Exit:		Error code
// ------------------------------
HRESULT	CSendQueue::Initialize( void )
{
	HRESULT	hr;


	hr = DPN_OK;
	if ( DNInitializeCriticalSection( &m_Lock ) == FALSE )
	{
		hr = DPNERR_OUTOFMEMORY;
		DPFX(DPFPREP,  0, "Could not initialize critical section for SendQueue!" );
	}
	else
	{
		DebugSetCriticalSectionRecursionCount( &m_Lock, 0 );
		DebugSetCriticalSectionGroup( &m_Lock, &g_blDPNModemCritSecsHeld );	 // separate dpnmodem CSes from the rest of DPlay's CSes
	}

	return	hr;
}
//**********************************************************************