pxtimer.h
上传用户:zhongxx05
上传日期:2007-06-06
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文件大小:4k
- /* ***** 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 ***** */
- #ifndef PXTIMER_H
- #define PXTIMER_H
- // Forward declarations
- typedef _INTERFACE IHXCallback IHXCallback;
- typedef _INTERFACE IHXScheduler IHXScheduler;
- class CHXBaseCountingObject;
- class PXTimerResponse : public IUnknown
- {
- public:
- // IUnknown methods
- STDMETHOD(QueryInterface) (THIS_ REFIID riid, void **ppvObj) PURE;
- STDMETHOD_(ULONG32,AddRef) (THIS) PURE;
- STDMETHOD_(ULONG32,Release) (THIS) PURE;
- // PXTimerResponse methods
- STDMETHOD(TimerFire) (THIS_ UINT32 ulInstance) PURE;
- };
- class PXTimer : public CHXBaseCountingObject,
- public IHXCallback
- {
- public:
- PXTimer();
- virtual ~PXTimer();
- // IUnknown methods
- STDMETHOD(QueryInterface) (THIS_ REFIID riid, void **ppvObj);
- STDMETHOD_(ULONG32,AddRef) (THIS);
- STDMETHOD_(ULONG32,Release) (THIS);
- // IHXCallback methods
- STDMETHOD(Func) (THIS);
- // PXTimer methods
- HX_RESULT Init(UINT32 ulInstance,
- IUnknown* pContext,
- PXTimerResponse* pResponse);
- HX_RESULT StartTimer(UINT32 ulInterval);
- void StopTimer();
- BOOL IsStarted();
- protected:
- enum
- {
- kStateConstructed,
- kStateInitialized,
- kStateActive,
- kMinInterval = 33
- };
- INT32 m_lRefCount;
- UINT32 m_ulState;
- UINT32 m_ulInstance;
- UINT32 m_ulInterval;
- IHXScheduler* m_pScheduler;
- PXTimerResponse* m_pResponse;
- UINT32 m_ulCallbackHandle;
- BOOL m_bCallbackPending;
- BOOL m_bInsideTimerFire;
- void Deallocate();
- BOOL IsCallbackPending();
- void RemovePendingCallback();
- };
- inline BOOL PXTimer::IsCallbackPending()
- {
- return m_bCallbackPending;
- }
- inline void PXTimer::RemovePendingCallback()
- {
- if (m_bCallbackPending && m_pScheduler)
- {
- m_pScheduler->Remove(m_ulCallbackHandle);
- m_bCallbackPending = FALSE;
- m_ulCallbackHandle = 0;
- }
- }
- inline BOOL PXTimer::IsStarted()
- {
- return (m_ulState == kStateActive ? TRUE : FALSE);
- }
- #endif