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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2008 Ciaran McCreesh
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis 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 General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef PALUDIS_GUARD_PALUDIS_DISTRIBUTION_IMPL_HH
+#define PALUDIS_GUARD_PALUDIS_DISTRIBUTION_IMPL_HH 1
+
+#include <paludis/distribution.hh>
+#include <paludis/util/mutex.hh>
+#include <paludis/util/hashes.hh>
+#include <paludis/util/config_file.hh>
+#include <paludis/util/options.hh>
+#include <paludis/util/instantiation_policy-impl.hh>
+#include <paludis/util/private_implementation_pattern-impl.hh>
+#include <tr1/unordered_map>
+
+namespace paludis
+{
+#ifndef PALUDIS_NO_DOUBLE_TEMPLATE
+ template <>
+#endif
+ template <typename Data_>
+ struct Implementation<ExtraDistributionData<Data_> >
+ {
+ mutable Mutex mutex;
+ mutable std::tr1::unordered_map<std::string, std::tr1::shared_ptr<const Data_>, Hash<std::string> > values;
+ };
+
+ template <typename Data_>
+ ExtraDistributionData<Data_>::ExtraDistributionData() :
+ PrivateImplementationPattern<ExtraDistributionData<Data_> >(new Implementation<ExtraDistributionData<Data_> >)
+ {
+ }
+
+ template <typename Data_>
+ ExtraDistributionData<Data_>::~ExtraDistributionData()
+ {
+ }
+
+ template <typename T_>
+ struct ExtraDistributionDataData;
+
+ template <typename Data_>
+ const std::tr1::shared_ptr<const Data_>
+ ExtraDistributionData<Data_>::data_from_distribution(const Distribution & d) const
+ {
+ Lock lock(this->_imp->mutex);
+ typename std::tr1::unordered_map<std::string, std::tr1::shared_ptr<const Data_>, Hash<std::string> >::const_iterator v(
+ this->_imp->values.find(d.name()));
+ if (this->_imp->values.end() != v)
+ return v->second;
+
+ KeyValueConfigFile k(d.extra_data_dir() / ExtraDistributionDataData<Data_>::config_file_name(),
+ KeyValueConfigFileOptions(), &KeyValueConfigFile::no_defaults, &KeyValueConfigFile::no_transformation);
+ std::tr1::shared_ptr<const Data_> data(ExtraDistributionDataData<Data_>::make_data(k));
+ this->_imp->values.insert(std::make_pair(d.name(), data));
+ return data;
+ }
+}
+
+#endif