97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2011 Artem Pavlenko
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*****************************************************************************/
|
|
|
|
// mapnik
|
|
#include <mapnik/debug.hpp>
|
|
#include <mapnik/util/fs.hpp>
|
|
#include <mapnik/mapped_memory_cache.hpp>
|
|
|
|
// boost
|
|
#include <boost/assert.hpp>
|
|
#include <boost/interprocess/file_mapping.hpp>
|
|
#include <boost/make_shared.hpp>
|
|
|
|
namespace mapnik
|
|
{
|
|
|
|
void mapped_memory_cache::clear()
|
|
{
|
|
#ifdef MAPNIK_THREADSAFE
|
|
mutex::scoped_lock lock(mutex_);
|
|
#endif
|
|
return cache_.clear();
|
|
}
|
|
|
|
bool mapped_memory_cache::insert(std::string const& uri, mapped_region_ptr mem)
|
|
{
|
|
#ifdef MAPNIK_THREADSAFE
|
|
mutex::scoped_lock lock(mutex_);
|
|
#endif
|
|
return cache_.insert(std::make_pair(uri,mem)).second;
|
|
}
|
|
|
|
boost::optional<mapped_region_ptr> mapped_memory_cache::find(std::string const& uri, bool update_cache)
|
|
{
|
|
#ifdef MAPNIK_THREADSAFE
|
|
mutex::scoped_lock lock(mutex_);
|
|
#endif
|
|
typedef boost::unordered_map<std::string, mapped_region_ptr>::const_iterator iterator_type;
|
|
boost::optional<mapped_region_ptr> result;
|
|
iterator_type itr = cache_.find(uri);
|
|
if (itr != cache_.end())
|
|
{
|
|
result.reset(itr->second);
|
|
return result;
|
|
}
|
|
|
|
if (mapnik::util::exists(uri))
|
|
{
|
|
try
|
|
{
|
|
file_mapping mapping(uri.c_str(),read_only);
|
|
mapped_region_ptr region(boost::make_shared<mapped_region>(mapping,read_only));
|
|
|
|
result.reset(region);
|
|
|
|
if (update_cache)
|
|
{
|
|
cache_.insert(std::make_pair(uri,*result));
|
|
}
|
|
return result;
|
|
}
|
|
catch (std::exception const& ex)
|
|
{
|
|
MAPNIK_LOG_ERROR(mapped_memory_cache)
|
|
<< "Error loading mapped memory file: '"
|
|
<< uri << "' (" << ex.what() << ")";
|
|
}
|
|
}
|
|
/*
|
|
else
|
|
{
|
|
MAPNIK_LOG_WARN(mapped_memory_cache) << "Memory region does not exist file: " << uri;
|
|
}
|
|
*/
|
|
return result;
|
|
}
|
|
|
|
}
|