145 lines
3.9 KiB
C++
145 lines
3.9 KiB
C++
/*==========================================================================
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*
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* Copyright (C) 1998-2000 Microsoft Corporation. All Rights Reserved.
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*
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* File: SendQueue.cpp
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* Content: Queue to manage outgoing sends
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*
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*
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* History:
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* Date By Reason
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* ==== == ======
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* 06/14/99 jtk Created
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***************************************************************************/
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#include "dnmdmi.h"
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#undef DPF_MODNAME
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#define DPF_MODNAME "SendQueue"
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#undef DPF_SUBCOMP
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#define DPF_SUBCOMP DN_SUBCOMP_MODEM
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//**********************************************************************
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// Constant definitions
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//**********************************************************************
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//**********************************************************************
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// Macro definitions
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//**********************************************************************
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//**********************************************************************
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// Structure definitions
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//**********************************************************************
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//**********************************************************************
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// Variable definitions
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//**********************************************************************
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//**********************************************************************
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// Function prototypes
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//**********************************************************************
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//**********************************************************************
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// Function definitions
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//**********************************************************************
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//**********************************************************************
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// ------------------------------
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// CSendQueue::CSendQueue - constructor
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//
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// Entry: Nothing
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//
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// Exit: Nothing
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//
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// Notes: Do not allocate anything in a constructor
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// ------------------------------
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CSendQueue::CSendQueue():
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m_pHead( NULL ),
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m_pTail( NULL )
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{
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}
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//**********************************************************************
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//**********************************************************************
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// ------------------------------
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// CSendQueue::~CSendQueue - destructor
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//
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// Entry: Nothing
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//
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// Exit: Nothing
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// ------------------------------
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CSendQueue::~CSendQueue()
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{
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DNASSERT( m_pHead == NULL );
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DNASSERT( m_pTail == NULL );
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}
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//**********************************************************************
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//**********************************************************************
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// ------------------------------
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// CSendQueue::Initialize - initialize this send queue
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//
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// Entry: Nothing
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//
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// Exit: Error code
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// ------------------------------
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HRESULT CSendQueue::Initialize( void )
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{
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HRESULT hr;
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hr = DPN_OK;
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if ( DNInitializeCriticalSection( &m_Lock ) == FALSE )
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{
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hr = DPNERR_OUTOFMEMORY;
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DPFX(DPFPREP, 0, "Could not initialize critical section for SendQueue!" );
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}
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else
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{
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DebugSetCriticalSectionRecursionCount( &m_Lock, 0 );
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}
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return hr;
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}
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//**********************************************************************
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//**********************************************************************
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// ------------------------------
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// CSendQueue::FindNextByEndpoint - find next entry in send queue given an endpoint
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//
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// Entry: Pointer to handle (initialized to NULL to start scanning)
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// Pointer to endpoint to find
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//
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// Exit: Pointer to next item referring to given endpoint
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// NULL = no item found
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// ------------------------------
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CWriteIOData *CSendQueue::FindNextByEndpoint( HANDLE *const pHandle, const CEndpoint *const pEndpoint )
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{
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CWriteIOData *pReturn;
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DNASSERT( pEndpoint != NULL );
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AssertCriticalSectionIsTakenByThisThread( &m_Lock, TRUE );
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//
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// initialize
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//
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pReturn = NULL;
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if ( *pHandle == NULL )
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{
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pReturn = m_pHead;
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}
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DNASSERT( FALSE );
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return pReturn;
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}
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//**********************************************************************
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