add wrapper for old fashion C apps
diff --git a/model/sync-app-socket-c.h b/model/sync-app-socket-c.h
new file mode 100644
index 0000000..12e74b2
--- /dev/null
+++ b/model/sync-app-socket-c.h
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * This program 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;
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ * 卞超轶 Chaoyi Bian <bcy@pku.edu.cn>
+ * Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef SYNC_APP_SOCKET_C_H
+#define SYNC_APP_SOCKET_C_H
+
+#include "sync-app-socket.h"
+
+extern "C" {
+ typedef struct SyncAppSocketStruct;
+
+ SyncAppSocketStruct *create_sync_app_socket(const char *prefix, void (*callback)(const char *, const char *));
+ void delete_sync_app_socket(SyncAppSocketStruct **sock);
+ bool sync_app_socket_publish(SyncAppSocketStruct *sock, const char *prefix, uint32_t session, const char *buf, int freshness);
+ void sync_app_socket_remove(SyncAppSocketStruct *sock, const char *prefix);
+}
+
+#endif // SYNC_APP_SOCKET_C_H