/usr/include/mapnik/datasource_cache.hpp is in libmapnik-dev 3.0.9+ds-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2015 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
*
*****************************************************************************/
#ifndef MAPNIK_DATASOURCE_CACHE_HPP
#define MAPNIK_DATASOURCE_CACHE_HPP
// mapnik
#include <mapnik/config.hpp>
#include <mapnik/util/singleton.hpp>
#include <mapnik/util/noncopyable.hpp>
// stl
#include <map>
#include <set>
#include <vector>
#include <memory>
#include <mutex>
namespace mapnik {
class datasource;
class parameters;
class PluginInfo;
class MAPNIK_DECL datasource_cache
: public singleton<datasource_cache, CreateStatic>,
private util::noncopyable
{
friend class CreateStatic<datasource_cache>;
public:
std::vector<std::string> plugin_names();
std::string plugin_directories();
bool register_datasources(std::string const& path, bool recurse = false);
bool register_datasource(std::string const& path);
std::shared_ptr<datasource> create(parameters const& params);
private:
datasource_cache();
~datasource_cache();
std::map<std::string,std::shared_ptr<PluginInfo> > plugins_;
std::set<std::string> plugin_directories_;
// the singleton has a mutex protecting the instance pointer,
// but the instance also needs its own mutex to protect the
// plugins_ and plugin_directories_ members which are potentially
// modified recusrively by register_datasources(path, true);
std::recursive_mutex instance_mutex_;
};
extern template class MAPNIK_DECL singleton<datasource_cache, CreateStatic>;
}
#endif // MAPNIK_DATASOURCE_CACHE_HPP
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