input/nfs: use the asynchronous libnfs API

More robust and cancellable.

src/lib/nfs/Glue.cxx

@@ -0,0 +1,69 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "Glue.hxx"
+#include "Manager.hxx"
+#include "IOThread.hxx"
+#include "util/Manual.hxx"
+
+class NfsGlue {
+	NfsManager manager;
+
+public:
+	NfsGlue(EventLoop &_loop)
+		:manager(_loop) {}
+
+	~NfsGlue() {
+		//assert(open_uri.empty());
+	}
+
+	NfsConnection &GetConnection(const char *server, const char *export_name) {
+		return manager.GetConnection(server, export_name);
+	}
+};
+
+static Manual<NfsGlue> nfs_glue;
+static unsigned in_use;
+
+void
+nfs_init()
+{
+	if (in_use++ > 0)
+		return;
+
+	nfs_glue.Construct(io_thread_get());
+}
+
+void
+nfs_finish()
+{
+	assert(in_use > 0);
+
+	if (--in_use > 0)
+		return;
+
+	nfs_glue.Destruct();
+}
+
+NfsConnection &
+nfs_get_connection(const char *server, const char *export_name)
+{
+	return nfs_glue->GetConnection(server, export_name);
+}