pxcallbk.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:6k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- // include
- #include "hxtypes.h"
- #include "hxcom.h"
- #include "hxengin.h"
- // pxcomlib
- #include "pxcallbk.h"
- // hxdebug
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static char HX_THIS_FILE[] = __FILE__;
- #endif
- PXCallback::PXCallback(UINT32 ulInstance)
- {
- m_lRefCount = 0;
- m_pScheduler = NULL;
- m_pResponse = NULL;
- m_ulCallbackHandle = 0;
- m_bCallbackPending = FALSE;
- m_bReportSchedulerTime = TRUE;
- m_ulTimeDelta = 0;
- m_ulInstance = ulInstance;
- }
- PXCallback::~PXCallback()
- {
- Deallocate();
- }
- STDMETHODIMP PXCallback::QueryInterface(REFIID riid, void** ppvObj)
- {
- HX_RESULT retVal = HXR_OK;
- if (IsEqualIID(riid, IID_IUnknown))
- {
- AddRef();
- *ppvObj = (IUnknown*) this;
- }
- else if (IsEqualIID(riid, IID_IHXCallback))
- {
- AddRef();
- *ppvObj = (IHXCallback*) this;
- }
- else
- {
- *ppvObj = NULL;
- retVal = HXR_NOINTERFACE;
- }
- return retVal;
- }
- STDMETHODIMP_(UINT32) PXCallback::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- STDMETHODIMP_(UINT32) PXCallback::Release()
- {
-
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
- delete this;
- return 0;
- }
- STDMETHODIMP PXCallback::Func()
- {
- HX_RESULT retVal = HXR_UNEXPECTED;
- if (m_pScheduler && m_pResponse)
- {
- // Compute time in milliseconds
- HXTimeval cTime = m_pScheduler->GetCurrentSchedulerTime();
- UINT32 ulTime = (cTime.tv_sec * 1000) + ((cTime.tv_usec + 500) / 1000);
- if (!m_bReportSchedulerTime)
- {
- ulTime -= m_ulTimeDelta;
- }
- // Clear the pending callback flag
- m_bCallbackPending = FALSE;
- m_ulCallbackHandle = 0;
- // Call back to the response interface
- retVal = m_pResponse->HandleCallback(ulTime, m_ulInstance);
- }
- return retVal;
- }
- HX_RESULT PXCallback::Init(IUnknown* pContext, PXCallbackResponse* pResponse,
- BOOL bReportSchedulerTime, UINT32 ulCurrentTime)
- {
- HX_RESULT retVal = HXR_OK;
- if (pContext && pResponse)
- {
- // Clear out everything if necessary
- Deallocate();
- // Init members
- retVal = pContext->QueryInterface(IID_IHXScheduler,
- (void**) &m_pScheduler);
- if (SUCCEEDED(retVal))
- {
- m_pResponse = pResponse;
- m_ulCallbackHandle = 0;
- m_bCallbackPending = FALSE;
- m_bReportSchedulerTime = bReportSchedulerTime;
- m_pResponse->AddRef();
- if (!m_bReportSchedulerTime)
- {
- // If the caller says NOT to report scheduler time, then the
- // caller should have provided a current time for us to use.
- // Therefore, we need to compute the delta between the scheduler time
- // and the caller's current time.
- //
- // Compute the current scheduler time
- HXTimeval cTime = m_pScheduler->GetCurrentSchedulerTime();
- UINT32 ulTime = (cTime.tv_sec * 1000) + ((cTime.tv_usec + 500) / 1000);
- // Compute the delta between the current scheduler time and the caller's current time
- m_ulTimeDelta = ulTime - ulCurrentTime;
- }
- }
- }
- else
- {
- retVal = HXR_INVALID_PARAMETER;
- }
- return retVal;
- }
- HX_RESULT PXCallback::ScheduleRelativeCallback(UINT32 ulTimeFromNow)
- {
- HX_RESULT retVal = HXR_OK;
- if (m_pScheduler)
- {
- // Remove any pending callback
- RemovePendingCallback();
- // Schedule a callback for ulTimeFromNow milliseconds from now
- m_ulCallbackHandle = m_pScheduler->RelativeEnter(this, ulTimeFromNow);
- // Set the callback flag
- m_bCallbackPending = TRUE;
- }
- else
- {
- retVal = HXR_UNEXPECTED;
- }
- return retVal;
- }
- HX_RESULT PXCallback::ScheduleAbsoluteCallback(HXTimeval cTime)
- {
- HX_RESULT retVal = HXR_OK;
- if (m_pScheduler)
- {
- // Remove any pending callback
- RemovePendingCallback();
- // Schedule a callback for ulTimeFromNow milliseconds from now
- m_ulCallbackHandle = m_pScheduler->AbsoluteEnter(this, cTime);
- // Set the callback flag
- m_bCallbackPending = TRUE;
- }
- else
- {
- retVal = HXR_UNEXPECTED;
- }
- return retVal;
- }
- void PXCallback::Deallocate()
- {
- if (IsCallbackPending())
- {
- RemovePendingCallback();
- }
- HX_RELEASE(m_pScheduler);
- HX_RELEASE(m_pResponse);
- }