unix_dll.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: unix_dll.cpp,v 1.5.8.3 2004/07/09 01:43:30 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 "dllacces.h"
- #include <dlfcn.h>
- #include "platform/unix/unix_dll_common.h"
- class UnixDLLAccess : public DLLAccessImp
- {
- public:
- UnixDLLAccess();
- virtual ~UnixDLLAccess();
- 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 void CreateName(const char* short_name, const char* long_name,
- char* out_buf, UINT32& out_buf_len,
- UINT32 nMajor, UINT32 nMinor)
- {
- UnixCreateName(short_name, long_name, out_buf, out_buf_len,
- nMajor, nMinor);
- }
- private:
- void* m_handle;
- };
- UnixDLLAccess::UnixDLLAccess() :
- m_handle(0)
- {}
- UnixDLLAccess::~UnixDLLAccess()
- {
- if (m_handle)
- {
- Close();
- }
- }
- int UnixDLLAccess::Open(const char* dllName)
- {
- int ret = DLLAccess::NO_LOAD;
- if (m_handle)
- {
- Close();
- }
-
- m_handle = dlopen(dllName, RTLD_LAZY);
- if (m_handle)
- {
- ret = DLLAccess::DLL_OK;
- }
- HandleHXStopOnLoad(dllName);
- return ret;
- }
- int UnixDLLAccess::Close()
- {
- int ret = DLLAccess::NO_LOAD;
- if(m_handle)
- {
- //GCC 2.95 does not clean up any function scope statics until
- //the atexit handler is called. This raises the problem that
- //if you have such a static defined in a DLL, and the DLL is
- //unloaded before the end of the program, you will get a seg
- //fault when the atexit handler fires as it is trying to clean
- //up memory that is no longer around. GCC 3.2 does not have
- //this problem. So, for any GCC<3.2 we will not do a
- //dlclose(). Be aware that this will make your runtime memory
- //requirment higher as all DLLs can be queried and freed at
- //startup of different apps.
- #if defined(__GNUC__)
- #if (__GNUC__>3 || (__GNUC__==3 && __GNUC_MINOR__>=2))
- if (!dlclose(m_handle))
- {
- ret = DLLAccess::DLL_OK;
- }
- # else // GCC versin < 3
- ret = DLLAccess::DLL_OK;
- # endif
- #else // Not using gnu C compiler...
- if (!dlclose(m_handle))
- {
- ret = DLLAccess::DLL_OK;
- }
- #endif
- m_handle = 0;
- }
-
- return ret;
- }
- void* UnixDLLAccess::GetSymbol(const char* symbolName)
- {
- return dlsym(m_handle, symbolName);
- }
- const char* UnixDLLAccess::GetErrorStr() const
- {
- return dlerror();
- }
- char* UnixDLLAccess::CreateVersionStr(const char* dllName) const
- {
- return UnixFindDLLVersion(dllName);
- }
- DLLAccessImp* DLLAccess::CreatePlatformDLLImp()
- {
- return new UnixDLLAccess();
- }