chxcache2.cpp
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上传日期:2013-07-19
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- /* ***** 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 "hxtypes.h"
- #include "hxcom.h" // IUnknown
- #include "hxiids.h" // GUIDs
- #include "hxslist.h" // CHXSimpleList
- #include "debug.h" // DPRINTF()
- #include "hxthread.h" // HXMutex
- #include "hxstring.h" // memcpy()
- #include "hxcomm.h" // IHXCommonClassFactory
- #include "ihxpckts.h" // IHXBuffer
- #include "hxcache2.h" // IHXCache2, IHXCacheObject, IHXCacheObjectResponse
- #include "chxcache2.h"
- #include "memcache.h"
- #ifdef HELIX_FEATURE_HTTP_FILECACHE
- #include "filecache.h"
- #endif
- /****************************************************************************
- * CHXcache2::CHXCache2
- *
- * Constructor
- */
- CHXCache2::CHXCache2()
- : m_RefCount(0)
- {
- DPRINTF(D_CACHE2, ("CHXCache2()n"));
- }
- // IUnknown COM Interface Methods
- /****************************************************************************
- * IUnknown::AddRef
- *
- * This routine increases the object reference count in a thread safe
- * manner. The reference count is used to manage the lifetime of an object.
- * This method must be explicitly called by the user whenever a new
- * reference to an object is used.
- */
- STDMETHODIMP_(UINT32) CHXCache2::AddRef(void)
- {
- return InterlockedIncrement(&m_RefCount);
- }
- /****************************************************************************
- * IUnknown::Release
- *
- * This routine decreases the object reference count in a thread safe
- * manner, and deletes the object if no more references to it exist. It must
- * be called explicitly by the user whenever an object is no longer needed.
- */
- STDMETHODIMP_(UINT32) CHXCache2::Release(void)
- {
- if (InterlockedDecrement(&m_RefCount) > 0)
- {
- return m_RefCount;
- }
- delete this;
- return 0;
- }
- /****************************************************************************
- * IUnknown::QueryInterface
- *
- * This routine indicates which interfaces this object supports. If a given
- * interface is supported, the object's reference count is incremented, and
- * a reference to that interface is returned. Otherwise a NULL object and
- * error code are returned. This method is called by other objects to
- * discover the functionality of this object.
- */
- STDMETHODIMP CHXCache2::QueryInterface(REFIID interfaceID,
- void** ppInterfaceObj)
- {
- // By definition all COM objects support the IUnknown interface
- if (IsEqualIID(interfaceID, IID_IUnknown))
- {
- AddRef();
- *ppInterfaceObj = (IUnknown*)(IHXCache2*)this;
- return HXR_OK;
- }
- // IHXCacheObject interface is supported
- else if (IsEqualIID(interfaceID, IID_IHXCache2))
- {
- AddRef();
- *ppInterfaceObj = (IHXCache2*)this;
- return HXR_OK;
- }
- // No other interfaces are supported
- *ppInterfaceObj = NULL;
- return HXR_NOINTERFACE;
- }
- /*
- * IHXCache2 methods
- */
- /************************************************************************
- * Method:
- *
- * IHXCache2::CreateMemCacheObject
- *
- * Purpose:
- *
- * Creates an object which implements the IHXCacheObject interface.
- * This object uses ONLY the memory for caching.
- */
- STDMETHODIMP CHXCache2::CreateMemCacheObject(THIS_
- IHXCacheObject** /*OUT*/ ppObject,
- IHXCommonClassFactory* /*IN*/ pClassFactory)
- {
- DPRINTF(D_CACHE2, ("CreateCacheMem()n"));
- if(pClassFactory == NULL)
- {
- return HXR_INVALID_PARAMETER;
- }
- HX_RESULT res = HXR_OUTOFMEMORY;
- // Create a new CCacheMem object which implements the caching methods.
- CHXMemCacheObject *pCacheObj = new CHXMemCacheObject(pClassFactory);
- if(pCacheObj != NULL)
- {
- pCacheObj->QueryInterface(IID_IHXCacheObject, (void **)ppObject);
- res = (*ppObject != NULL)? HXR_OK: HXR_UNEXPECTED;
- }
- return res;
- } // CreateMemCacheObject()
- #ifdef HELIX_FEATURE_HTTP_FILECACHE
- /************************************************************************
- * Method:
- *
- * IHXCache2::CreateFileCacheObject
- *
- * Purpose:
- *
- * Creates an object which implements the IHXCacheObject interface.
- */
- STDMETHODIMP
- CHXCache2::CreateFileCacheObject(IHXCacheObject** /*OUT*/ ppObject,
- IHXCommonClassFactory* /*IN*/ pClassFactory,
- UINT32 /*IN*/ ulFileLength,
- char* /*IN*/ pFileName)
- {
- DPRINTF(D_CACHE2, ("CreateFileCacheObject()n"));
- if( (pClassFactory == NULL) || (ulFileLength == 0) || (pFileName == NULL) )
- {
- return HXR_INVALID_PARAMETER;
- }
- HX_RESULT res = HXR_OUTOFMEMORY;
- // Create a new CHXFileCacheObject object which implements the caching methods.
- CHXFileCacheObject *pCacheObj = new CHXFileCacheObject(pClassFactory,
- ulFileLength,
- pFileName);
- if(pCacheObj != NULL)
- {
- pCacheObj->QueryInterface(IID_IHXCacheObject, (void **)ppObject);
- res = (*ppObject != NULL)? HXR_OK: HXR_UNEXPECTED;
- }
- return res;
- } // CreateFileCacheObject()
- #endif // HELIX_FEATURE_HTTP_FILECACHE