metadllaccess.cpp
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上传日期:2007-06-06
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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 "hxtypes.h"
- #include "hxcom.h"
- #include "hlxclib/string.h"
- #include "hlxclib/stdio.h"
- #include "hxassert.h"
- #include "dllacces.h"
- #include "dllpath.h"
- #include "hxstrutl.h"
- #include "hxdir.h" // for OS_SEPARATOR_CHAR
- #if !defined(_STATICALLY_LINKED) || !defined(HELIX_CONFIG_CONSOLIDATED_CORE)
- #error this file should exist only for consolidated core builds!
- #endif
- class MetaDLLAccess : public DLLAccessImp
- {
- public:
- MetaDLLAccess();
- virtual ~MetaDLLAccess();
- virtual int Open(const char* dllName);
- virtual int Close() ;
- virtual void* GetSymbol(const char* symbolName);
- virtual const char* GetErrorStr() const;
- virtual char* CreateVersionStr(const char* dllName) const;
- virtual DLLAccessPath* GetDLLAccessPath();
- virtual void CreateName(const char* short_name, const char* long_name,
- char* out_buf, UINT32& out_buf_len,
- UINT32 nMajor, UINT32 nMinor);
- private:
- DLLAccessImp* m_pActualDLLAccessImp;
- };
- MetaDLLAccess::MetaDLLAccess()
- : m_pActualDLLAccessImp(NULL)
- {
- // default to platform-specific implementation, although
- // if Open() fails it will fall back to static implementation.
- m_pActualDLLAccessImp = DLLAccess::CreatePlatformDLLImp();
- }
- MetaDLLAccess::~MetaDLLAccess()
- {
- HX_DELETE(m_pActualDLLAccessImp);
- }
- int
- MetaDLLAccess::Open(const char* dllName)
- {
- int ret = DLLAccess::NO_LOAD;
-
- ret = m_pActualDLLAccessImp->Open(dllName);
- if (ret != DLLAccess::DLL_OK)
- {
- // couldn't find it in platform-specific (dynamic)
- // DLL so look in the statically-linked implementation
- HX_DELETE(m_pActualDLLAccessImp);
-
- // we may (probably do) need to strip the name from the
- // full pathname.
- const char* justName = strrchr(dllName, OS_SEPARATOR_CHAR);
- if (justName)
- {
- justName++; // get past the separator character
- }
- else
- {
- justName = dllName;
- }
-
- m_pActualDLLAccessImp = DLLAccess::CreateStaticDLLImp();
- ret = m_pActualDLLAccessImp->Open(justName);
-
- if (ret != DLLAccess::DLL_OK)
- {
- HX_DELETE(m_pActualDLLAccessImp);
- }
- }
-
- HX_ASSERT(m_pActualDLLAccessImp);
- return ret;
- }
- int
- MetaDLLAccess::Close()
- {
- int ret = DLLAccess::DLL_OK;
-
- HX_ASSERT(m_pActualDLLAccessImp);
- if (m_pActualDLLAccessImp)
- {
- ret = m_pActualDLLAccessImp->Close();
- }
- return ret;
- }
- void*
- MetaDLLAccess::GetSymbol(const char* symbolName)
- {
- HX_ASSERT(m_pActualDLLAccessImp);
- if (m_pActualDLLAccessImp)
- {
- return m_pActualDLLAccessImp->GetSymbol(symbolName);
- }
- else
- {
- return NULL;
- }
- }
- const char*
- MetaDLLAccess::GetErrorStr() const
- {
- HX_ASSERT(m_pActualDLLAccessImp);
- if (m_pActualDLLAccessImp)
- {
- return m_pActualDLLAccessImp->GetErrorStr();
- }
- else
- {
- return NULL;
- }
- }
- char*
- MetaDLLAccess::CreateVersionStr(const char* dllName) const
- {
- HX_ASSERT(m_pActualDLLAccessImp);
- if (m_pActualDLLAccessImp)
- {
- return m_pActualDLLAccessImp->CreateVersionStr(dllName);
- }
- else
- {
- return NULL;
- }
- }
- DLLAccessPath*
- MetaDLLAccess::GetDLLAccessPath()
- {
- HX_ASSERT(m_pActualDLLAccessImp);
- if (m_pActualDLLAccessImp)
- {
- return m_pActualDLLAccessImp->GetDLLAccessPath();
- }
- else
- {
- return 0;
- }
- }
- void
- MetaDLLAccess::CreateName(const char* short_name, const char* long_name,
- char* out_buf, UINT32& out_buf_len,
- UINT32 nMajor, UINT32 nMinor)
- {
- DLLAccessImp* pDLLAccessImp = NULL;
- if (1)
- {
- pDLLAccessImp = DLLAccess::CreateStaticDLLImp();
- }
- else
- {
- pDLLAccessImp = DLLAccess::CreatePlatformDLLImp();
- }
- pDLLAccessImp->CreateName(short_name, long_name, out_buf, out_buf_len, nMajor, nMinor);
- HX_DELETE(pDLLAccessImp);
- }
- DLLAccessImp* DLLAccess::CreateMetaDLLImp()
- {
- return new MetaDLLAccess();
- }