00001 /* 00002 * Copyright (c) 2012, Willow Garage, Inc. 00003 * 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 00009 * notice, 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 the Willow Garage, Inc. nor the names of its 00014 * contributors may be used to endorse or promote products derived from 00015 * this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00018 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00021 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00022 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00023 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00024 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00025 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00026 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00027 * POSSIBILITY OF SUCH DAMAGE. 00028 */ 00029 00030 #include "class_loader/multi_library_class_loader.h" 00031 00032 namespace class_loader 00033 { 00034 00035 MultiLibraryClassLoader::MultiLibraryClassLoader(bool enable_ondemand_loadunload) : 00036 enable_ondemand_loadunload_(enable_ondemand_loadunload) 00037 { 00038 } 00039 00040 MultiLibraryClassLoader::~MultiLibraryClassLoader() 00041 { 00042 shutdownAllClassLoaders(); 00043 } 00044 00045 std::vector<std::string> MultiLibraryClassLoader::getRegisteredLibraries() 00046 { 00047 std::vector<std::string> libraries; 00048 for(LibraryToClassLoaderMap::iterator itr = active_class_loaders_.begin(); itr != active_class_loaders_.end(); itr++) 00049 libraries.push_back(itr->first); 00050 return(libraries); 00051 } 00052 00053 ClassLoader* MultiLibraryClassLoader::getClassLoaderForLibrary(const std::string& library_path) 00054 { 00055 LibraryToClassLoaderMap::iterator itr = active_class_loaders_.find(library_path); 00056 if (itr != active_class_loaders_.end()) return itr->second; 00057 else return NULL; 00058 } 00059 00060 ClassLoaderVector MultiLibraryClassLoader::getAllAvailableClassLoaders() 00061 { 00062 ClassLoaderVector loaders; 00063 for(LibraryToClassLoaderMap::iterator itr = active_class_loaders_.begin(); itr != active_class_loaders_.end(); itr++) 00064 loaders.push_back(itr->second); 00065 return(loaders); 00066 } 00067 00068 bool MultiLibraryClassLoader::isLibraryAvailable(const std::string& library_name) 00069 { 00070 return (getClassLoaderForLibrary(library_name) != NULL); 00071 } 00072 00073 void MultiLibraryClassLoader::loadLibrary(const std::string& library_path) 00074 { 00075 if(!isLibraryAvailable(library_path)) 00076 active_class_loaders_[library_path] = new class_loader::ClassLoader(library_path, isOnDemandLoadUnloadEnabled()); 00077 } 00078 00079 void MultiLibraryClassLoader::shutdownAllClassLoaders() 00080 { 00081 std::vector<std::string> available_libraries = getRegisteredLibraries(); 00082 for(unsigned int c = 0; c < available_libraries.size(); c++) 00083 unloadLibrary(available_libraries.at(c)); 00084 } 00085 00086 int MultiLibraryClassLoader::unloadLibrary(const std::string& library_path) 00087 { 00088 int remaining_unloads = 0; 00089 LibraryToClassLoaderMap::iterator itr = active_class_loaders_.find(library_path); 00090 if (itr != active_class_loaders_.end()) 00091 { 00092 ClassLoader* loader = itr->second; 00093 if((remaining_unloads = loader->unloadLibrary()) == 0) 00094 { 00095 delete(loader); 00096 active_class_loaders_.erase(itr); 00097 } 00098 } 00099 return(remaining_unloads); 00100 } 00101 00102 }