CMake/Source/cmDynamicLoader.cxx
Kitware Robot 1772622772 LICENSE: Replace references to Copyright.txt with LICENSE.rst
```
git grep -lz 'Copyright.txt or https://cmake.org/licensing ' |
  while IFS= read -r -d $'\0' f ; do
    sed -i '/Copyright.txt or https:\/\/cmake.org\/licensing / {
              s/Copyright.txt/LICENSE.rst/
            }' "$f" ; done
```
2025-03-03 10:43:35 -05:00

93 lines
2.3 KiB
C++

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