blocxx

dyldSharedLibrary.cpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2005, Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2006, Novell, Inc. All rights reserved.
00004 * 
00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
00007 * 
00008 *     * Redistributions of source code must retain the above copyright notice,
00009 *       this list of conditions and the following disclaimer.
00010 *     * Redistributions in binary form must reproduce the above copyright
00011 *       notice, this list of conditions and the following disclaimer in the
00012 *       documentation and/or other materials provided with the distribution.
00013 *     * Neither the name of 
00014 *       Vintela, Inc., 
00015 *       nor Novell, Inc., 
00016 *       nor the names of its contributors or employees may be used to 
00017 *       endorse or promote products derived from this software without 
00018 *       specific prior written permission.
00019 * 
00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00021 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00022 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00023 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00024 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00025 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00026 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00027 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00028 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00029 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00030 * POSSIBILITY OF SUCH DAMAGE.
00031 *******************************************************************************/
00032 
00033 
00038 #include "blocxx/BLOCXX_config.h"
00039 #if defined(BLOCXX_USE_DYLD)
00040 #include "blocxx/dyldSharedLibrary.hpp"
00041 
00042 #include <mach-o/dyld.h>
00043 
00044 namespace BLOCXX_NAMESPACE
00045 {
00046 
00047 dyldSharedLibrary::dyldSharedLibrary(NSModule libhandle, const String& libName)
00048    : SharedLibrary()
00049    , m_libhandle( libhandle )
00050    , m_libName(libName)
00051 {
00052 }
00053 
00054 dyldSharedLibrary::~dyldSharedLibrary()
00055 {
00056    NSUnLinkModule(m_libhandle, NSUNLINKMODULE_OPTION_NONE);
00057 }
00058 bool dyldSharedLibrary::doGetFunctionPointer(const String& functionName,
00059                void** fp) const
00060 {
00061    void *retval = NULL;
00062    NSSymbol symbol;
00063    String arg = '_' + functionName;
00064    symbol = NSLookupSymbolInModule(m_libhandle, arg.c_str());  
00065    if (symbol == NULL) 
00066    {
00067       return false;
00068    }
00069    retval = NSAddressOfSymbol(symbol);
00070    if (retval == NULL) 
00071    {
00072       return false;
00073    }
00074    *fp = retval;
00075    return true;
00076 }
00077 
00078 } // end namespace BLOCXX_NAMESPACE
00079 
00080 #endif // BLOCXX_USE_DYLD