mirror of https://gitee.com/bigwinds/arangodb
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief library loader
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2004-2012 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Copyright 2009-2012, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "LibraryLoader.h"
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#if defined(TRI_HAVE_DLFCN_H)
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#include <dlfcn.h>
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#endif
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using namespace triagens::basics;
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namespace triagens {
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namespace rest {
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namespace LibraryLoader {
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// -----------------------------------------------------------------------------
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// private functions
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// -----------------------------------------------------------------------------
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void* loadSharedLibrary (char const* filename, string const& symbol, void*& handle) {
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LOGGER_DEBUG << "trying to use library file '" << (filename ? filename : "self") << "'";
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// open library
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handle = dlopen(filename, RTLD_NOW | RTLD_LOCAL);
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if (handle == 0) {
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LOGGER_DEBUG << "cannot open library file '" << (filename ? filename : "self") << "'";
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LOGGER_DEBUG << "dlerror: " << dlerror();
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return 0;
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}
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// look for init function
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void* init = dlsym(handle, symbol.c_str());
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if (init == 0) {
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LOGGER_DEBUG << "cannot find '" << symbol << "' in '" << (filename ? filename : "self") << "'";
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dlclose(handle);
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return 0;
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}
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return init;
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}
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void closeLibrary (void* handle) {
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dlclose(handle);
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}
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}
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}
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}
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