blocxx

DLLSharedLibrary.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 
00039 #include "blocxx/BLOCXX_config.h"
00040 
00041 #if defined(BLOCXX_USE_DLL)
00042 #include "blocxx/DLLSharedLibrary.hpp"
00043 #include "blocxx/Format.hpp"
00044 #include "blocxx/Mutex.hpp"
00045 #include "blocxx/MutexLock.hpp"
00046 
00047 #include <iostream>
00048 
00049 namespace
00050 {
00051 typedef void (__stdcall *DllEntry_t)(void);
00052 }
00053 
00054 namespace BLOCXX_NAMESPACE
00055 {
00056 
00057 Mutex DLLSharedLibrary_guard;
00058 
00060 DLLSharedLibrary::DLLSharedLibrary(HINSTANCE libhandle, const String& libName)
00061    : SharedLibrary(), m_libhandle(libhandle), m_libName(libName)
00062 {
00063    DllEntry_t ensureInit;
00064 
00065    if( getFunctionPointer("DllEnsureInit", ensureInit) )
00066       ensureInit();
00067 }
00069 DLLSharedLibrary::~DLLSharedLibrary()
00070 {
00071    DllEntry_t forceTerm;
00072 
00073    if( getFunctionPointer("DllForceTerm", forceTerm) )
00074       forceTerm();
00075 
00076    ::FreeLibrary(m_libhandle);
00077 }
00079 bool
00080 DLLSharedLibrary::doGetFunctionPointer(const String& functionName,
00081    void** fp) const
00082 {
00083    MutexLock l(DLLSharedLibrary_guard);
00084 
00085    *fp = (void*) ::GetProcAddress(m_libhandle, functionName.c_str());
00086      
00087    if (!*fp)
00088    {
00089       return false;
00090    }
00091 
00092    return true;
00093 }
00094 
00095 } // end namespace BLOCXX_NAMESPACE
00096 
00097 #endif
00098