/*============================================================================ CMake - Cross Platform Makefile Generator Copyright 2000-2009 Kitware, Inc., Insight Software Consortium Distributed under the OSI-approved BSD License (the "License"); see accompanying file Copyright.txt for details. This software is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the License for more information. ============================================================================*/ #include "cmDynamicLoader.h" class cmDynamicLoaderCache { public: ~cmDynamicLoaderCache(); void CacheFile(const char* path, const cmsys::DynamicLoader::LibraryHandle&); bool GetCacheFile(const char* path, cmsys::DynamicLoader::LibraryHandle&); bool FlushCache(const char* path); void FlushCache(); static cmDynamicLoaderCache* GetInstance(); private: std::map<cmStdString, cmsys::DynamicLoader::LibraryHandle> CacheMap; static cmDynamicLoaderCache* Instance; }; cmDynamicLoaderCache* cmDynamicLoaderCache::Instance = 0; cmDynamicLoaderCache::~cmDynamicLoaderCache() { } void cmDynamicLoaderCache::CacheFile(const char* path, const cmsys::DynamicLoader::LibraryHandle& p) { cmsys::DynamicLoader::LibraryHandle h; if ( this->GetCacheFile(path, h) ) { this->FlushCache(path); } this->CacheMap[path] = p; } bool cmDynamicLoaderCache::GetCacheFile(const char* path, cmsys::DynamicLoader::LibraryHandle& p) { std::map<cmStdString, cmsys::DynamicLoader::LibraryHandle>::iterator it = this->CacheMap.find(path); if ( it != this->CacheMap.end() ) { p = it->second; return true; } return false; } bool cmDynamicLoaderCache::FlushCache(const char* path) { std::map<cmStdString, cmsys::DynamicLoader::LibraryHandle>::iterator it = this->CacheMap.find(path); bool ret = false; if ( it != this->CacheMap.end() ) { cmsys::DynamicLoader::CloseLibrary(it->second); this->CacheMap.erase(it); ret = true; } return ret; } void cmDynamicLoaderCache::FlushCache() { for ( std::map<cmStdString, cmsys::DynamicLoader::LibraryHandle>::iterator it = this->CacheMap.begin(); it != this->CacheMap.end(); it++ ) { cmsys::DynamicLoader::CloseLibrary(it->second); } delete cmDynamicLoaderCache::Instance; cmDynamicLoaderCache::Instance = 0; } cmDynamicLoaderCache* cmDynamicLoaderCache::GetInstance() { if ( !cmDynamicLoaderCache::Instance ) { cmDynamicLoaderCache::Instance = new cmDynamicLoaderCache; } return cmDynamicLoaderCache::Instance; } cmsys::DynamicLoader::LibraryHandle cmDynamicLoader::OpenLibrary( const char* libname ) { cmsys::DynamicLoader::LibraryHandle lh; if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) ) { return lh; } lh = cmsys::DynamicLoader::OpenLibrary(libname); cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh); return lh; } void cmDynamicLoader::FlushCache() { cmDynamicLoaderCache::GetInstance()->FlushCache(); }