pxtimer.cpp
上传用户:dangjiwu
上传日期:2013-07-19
资源大小:42019k
文件大小:7k
- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: pxtimer.cpp,v 1.4.20.3 2004/07/09 01:44:03 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (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.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * 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"
- // pnmisc
- #include "baseobj.h"
- // pxcomlib
- #include "pxtimer.h"
- // pndebug
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- PXTimer::PXTimer()
- {
- m_lRefCount = 0;
- m_ulState = kStateConstructed;
- m_ulInstance = 0;
- m_ulInterval = 0;
- m_pScheduler = NULL;
- m_pResponse = NULL;
- m_ulCallbackHandle = 0;
- m_bCallbackPending = FALSE;
- m_bInsideTimerFire = FALSE;
- }
- PXTimer::~PXTimer()
- {
- Deallocate();
- }
- void PXTimer::Deallocate()
- {
- if (IsCallbackPending())
- {
- RemovePendingCallback();
- }
- HX_RELEASE(m_pScheduler);
- HX_RELEASE(m_pResponse);
- }
- STDMETHODIMP PXTimer::QueryInterface(REFIID riid, void** ppvObj)
- {
- QInterfaceList qiList[] =
- {
- { GET_IIDHANDLE(IID_IUnknown), (IUnknown*)this },
- { GET_IIDHANDLE(IID_IHXCallback), (IHXCallback*) this },
- };
- return QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
- }
- STDMETHODIMP_(UINT32) PXTimer::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- STDMETHODIMP_(UINT32) PXTimer::Release()
- {
-
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
- delete this;
- return 0;
- }
- STDMETHODIMP PXTimer::Func()
- {
- HX_RESULT retVal = HXR_OK;
- if (m_pScheduler && m_pResponse)
- {
- // Schedule another callback m_ulInterval
- // milliseconds from now
- m_ulCallbackHandle = m_pScheduler->RelativeEnter(this, m_ulInterval);
- // Set the callback pending flag
- m_bCallbackPending = TRUE;
- // Make sure we don't allow re-entrancy
- // into TimerFire().
- if (!m_bInsideTimerFire)
- {
- // Set the re-entrancy flag
- m_bInsideTimerFire = TRUE;
- // Call TimerFire on the response interface
- m_pResponse->TimerFire(m_ulInstance);
- // Clear the re-entrancy flag
- m_bInsideTimerFire = FALSE;
- }
- }
- return retVal;
- }
- HX_RESULT PXTimer::Init(UINT32 ulInstance,
- IUnknown* pContext,
- PXTimerResponse* pResponse)
- {
- 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))
- {
- // Save the members
- m_ulInstance = ulInstance;
- m_pResponse = pResponse;
- m_ulCallbackHandle = 0;
- m_bCallbackPending = FALSE;
- m_pResponse->AddRef();
- // Set the state
- m_ulState = kStateInitialized;
- }
- }
- else
- {
- retVal = HXR_INVALID_PARAMETER;
- }
- return retVal;
- }
- HX_RESULT PXTimer::StartTimer(UINT32 ulInterval)
- {
- HX_RESULT retVal = HXR_OK;
- if (m_ulState == kStateConstructed)
- {
- retVal = HXR_NOT_INITIALIZED;
- }
- else if (m_ulState == kStateInitialized)
- {
- if (ulInterval >= kMinInterval)
- {
- // Save the interval
- m_ulInterval = ulInterval;
- // Schedule the first callback
- m_ulCallbackHandle = m_pScheduler->RelativeEnter(this, m_ulInterval);
- // Set the callback flag
- m_bCallbackPending = TRUE;
- // Set the state
- m_ulState = kStateActive;
- }
- else
- {
- retVal = HXR_INVALID_PARAMETER;
- }
- }
- else if (m_ulState == kStateActive)
- {
- // Timer is already started, so no need to
- // do anything...
- }
- return retVal;
- }
- void PXTimer::StopTimer()
- {
- if (m_ulState == kStateConstructed ||
- m_ulState == kStateInitialized)
- {
- // Timer has not been started; therefore,
- // we don't need to do anything to stop it.
- }
- else if (m_ulState == kStateActive)
- {
- // Remove any pending callback
- if (IsCallbackPending())
- {
- RemovePendingCallback();
- }
- // Reset the state
- m_ulState = kStateInitialized;
- }
- }