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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile: cmDynamicLoader.cxx,v $
Language: C++
Date: $Date: 2006/03/16 22:09:08 $
Version: $Revision: 1.29 $
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices 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();
}
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