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93 lines
2.3 KiB
93 lines
2.3 KiB
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmDynamicLoader.h"
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#include <map>
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#include <string>
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#include <utility>
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namespace {
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class cmDynamicLoaderCache
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{
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public:
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~cmDynamicLoaderCache();
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void CacheFile(const char* path, cmsys::DynamicLoader::LibraryHandle /*p*/);
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bool GetCacheFile(const char* path,
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cmsys::DynamicLoader::LibraryHandle& /*p*/);
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bool FlushCache(const char* path);
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void FlushCache();
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static cmDynamicLoaderCache& GetInstance();
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private:
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std::map<std::string, cmsys::DynamicLoader::LibraryHandle> CacheMap;
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static cmDynamicLoaderCache Instance;
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};
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cmDynamicLoaderCache cmDynamicLoaderCache::Instance;
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}
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cmDynamicLoaderCache::~cmDynamicLoaderCache() = default;
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void cmDynamicLoaderCache::CacheFile(const char* path,
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cmsys::DynamicLoader::LibraryHandle p)
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{
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cmsys::DynamicLoader::LibraryHandle h;
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if (this->GetCacheFile(path, h)) {
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this->FlushCache(path);
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}
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this->CacheMap[path] = p;
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}
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bool cmDynamicLoaderCache::GetCacheFile(const char* path,
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cmsys::DynamicLoader::LibraryHandle& p)
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{
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auto it = this->CacheMap.find(path);
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if (it != this->CacheMap.end()) {
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p = it->second;
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return true;
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}
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return false;
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}
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bool cmDynamicLoaderCache::FlushCache(const char* path)
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{
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auto it = this->CacheMap.find(path);
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bool ret = false;
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if (it != this->CacheMap.end()) {
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cmsys::DynamicLoader::CloseLibrary(it->second);
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this->CacheMap.erase(it);
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ret = true;
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}
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return ret;
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}
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void cmDynamicLoaderCache::FlushCache()
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{
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for (auto const& it : this->CacheMap) {
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cmsys::DynamicLoader::CloseLibrary(it.second);
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}
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this->CacheMap.clear();
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}
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cmDynamicLoaderCache& cmDynamicLoaderCache::GetInstance()
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{
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return cmDynamicLoaderCache::Instance;
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}
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cmsys::DynamicLoader::LibraryHandle cmDynamicLoader::OpenLibrary(
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const char* libname)
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{
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cmsys::DynamicLoader::LibraryHandle lh;
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if (cmDynamicLoaderCache::GetInstance().GetCacheFile(libname, lh)) {
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return lh;
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}
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lh = cmsys::DynamicLoader::OpenLibrary(libname);
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cmDynamicLoaderCache::GetInstance().CacheFile(libname, lh);
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return lh;
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}
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void cmDynamicLoader::FlushCache()
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{
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cmDynamicLoaderCache::GetInstance().FlushCache();
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}
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