1 files changed, 116 insertions, 0 deletions
diff --git a/src/lib/nfs/Manager.hxx b/src/lib/nfs/Manager.hxx
new file mode 100644
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+++ b/src/lib/nfs/Manager.hxx
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_NFS_MANAGER_HXX
+#define MPD_NFS_MANAGER_HXX
+
+#include "check.h"
+#include "Connection.hxx"
+#include "Compiler.h"
+#include "event/IdleMonitor.hxx"
+
+#include <boost/intrusive/set.hpp>
+#include <boost/intrusive/slist.hpp>
+
+/**
+ * A manager for NFS connections.  Handles multiple connections to
+ * multiple NFS servers.
+ */
+class NfsManager final : IdleMonitor {
+	struct LookupKey {
+		const char *server;
+		const char *export_name;
+	};
+
+	class ManagedConnection final
+		: public NfsConnection,
+		  public boost::intrusive::slist_base_hook<boost::intrusive::link_mode<boost::intrusive::normal_link>>,
+		  public boost::intrusive::set_base_hook<boost::intrusive::link_mode<boost::intrusive::normal_link>> {
+		NfsManager &manager;
+
+	public:
+		ManagedConnection(NfsManager &_manager, EventLoop &_loop,
+				  const char *_server,
+				  const char *_export_name)
+			:NfsConnection(_loop, _server, _export_name),
+			 manager(_manager) {}
+
+	protected:
+		/* virtual methods from NfsConnection */
+		void OnNfsConnectionError(Error &&error) override;
+	};
+
+	struct Compare {
+		gcc_pure
+		bool operator()(const LookupKey a,
+				const ManagedConnection &b) const;
+
+		gcc_pure
+		bool operator()(const ManagedConnection &a,
+				const LookupKey b) const;
+	};
+
+	/**
+	 * Maps server and export_name to #ManagedConnection.
+	 */
+	typedef boost::intrusive::set<ManagedConnection,
+				      boost::intrusive::compare<Compare>,
+				      boost::intrusive::constant_time_size<false>> Map;
+
+	Map connections;
+
+	typedef boost::intrusive::slist<ManagedConnection> List;
+
+	/**
+	 * A list of "garbage" connection objects.  Their destruction
+	 * is postponed because they were thrown into the garbage list
+	 * when callers on the stack were still using them.
+	 */
+	List garbage;
+
+public:
+	NfsManager(EventLoop &_loop)
+		:IdleMonitor(_loop) {}
+
+	/**
+	 * Must be run from EventLoop's thread.
+	 */
+	~NfsManager();
+
+	gcc_pure
+	NfsConnection &GetConnection(const char *server,
+				     const char *export_name);
+
+private:
+	void ScheduleDelete(ManagedConnection &c) {
+		connections.erase(connections.iterator_to(c));
+		garbage.push_front(c);
+		IdleMonitor::Schedule();
+	}
+
+	/**
+	 * Delete all connections on the #garbage list.
+	 */
+	void CollectGarbage();
+
+	/* virtual methods from IdleMonitor */
+	void OnIdle() override;
+};
+
+#endif