cresload.cpp
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上传日期:2007-06-06
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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 "hxmap.h"
- #include "platform/mac/cresload.h"
- CResourceLoader::CResourceLoader(FSSpec& theFileSpec)
- : m_theResFile(-1)
- , m_ulRefCount(0)
- , m_theFileSpec(theFileSpec)
- , m_theHandleMap(0)
- {
- m_theHandleMap = new CHXMapPtrToPtr();
- }
- CResourceLoader::~CResourceLoader()
- {
- zm_theResourceLoader = NULL;
- HX_ASSERT(m_theHandleMap->IsEmpty());
- delete m_theHandleMap;
- m_theHandleMap = 0;
-
- // close the resource file
- ::CloseResFile(m_theResFile);
- m_theResFile = -1;
- }
- CResourceLoader*
- CResourceLoader::CreateInstance(FSSpec& theFileSpec)
- {
- if (NULL == zm_theResourceLoader)
- {
- zm_theResourceLoader = new CResourceLoader(theFileSpec);
- }
- zm_theResourceLoader->AddRef();
- return zm_theResourceLoader;
- }
- UINT32
- CResourceLoader::AddRef()
- {
- InterlockedIncrement(&m_ulRefCount);
- return m_ulRefCount;
- }
- UINT32
- CResourceLoader::Release()
- {
- if (InterlockedDecrement(&m_ulRefCount) > 0)
- {
- return m_ulRefCount;
- }
- delete this;
- return 0;
- }
- Handle
- CResourceLoader::LoadResource(ResType theType, INT16 id)
- {
- Handle hRes = 0;
- // save the old file
- INT16 thePrevResFile = ::CurResFile();
- if (m_theResFile == -1)
- {
- m_theResFile = ::FSpOpenResFile(&m_theFileSpec, fsRdPerm);
- }
- if (m_theResFile != -1)
- {
- // set our's current
- ::UseResFile(m_theResFile);
- // load the resource
- hRes = ::Get1Resource(theType, id);
- // do the mapping stuff here in case we already have this handle around...
- if (hRes)
- {
- long thisHandleCount = 0;
- (void)m_theHandleMap->Lookup(hRes, (void*&)thisHandleCount);
- thisHandleCount++;
- (void)m_theHandleMap->SetAt(hRes, (void*)thisHandleCount);
- }
-
- // reset old res file
- ::UseResFile(thePrevResFile);
- }
- return hRes;
- }
- void
- CResourceLoader::UnloadResource(Handle hRes)
- {
- // see if the handle has more than one mapped to it; we may not need to
- // release the resource.
- HX_ASSERT(hRes != nil);
- if (!hRes) return;
-
- long thisHandleCount = 0;
- (void)m_theHandleMap->Lookup(hRes, (void*&)thisHandleCount);
- HX_ASSERT(thisHandleCount > 0);
- thisHandleCount--;
-
- if (thisHandleCount == 0)
- {
- // unload the resource
- ::ReleaseResource(hRes);
-
- (void)m_theHandleMap->RemoveKey(hRes);
- }
- else
- {
- (void)m_theHandleMap->SetAt(hRes, (void*)thisHandleCount);
- }
- }