+/* declaration */
+XBT_PUBLIC(void) gras_msgtype_declare_rpc(const char *name,
+ gras_datadesc_type_t
+ payload_request,
+ gras_datadesc_type_t
+ payload_answer);
+
+XBT_PUBLIC(void) gras_msgtype_declare_rpc_v(const char *name,
+ short int version,
+ gras_datadesc_type_t
+ payload_request,
+ gras_datadesc_type_t
+ payload_answer);
+
+/* client side */
+
+/** @brief Conduct a RPC call
+ * @hideinitializer
+ */
+#define gras_msg_rpccall(server,timeout,msg,req,ans) gras_msg_rpccall_(server,timeout,gras_msgtype_by_name(msg),req,ans)
+XBT_PUBLIC(void) gras_msg_rpccall_(gras_socket_t server,
+ double timeOut,
+ gras_msgtype_t msgtype,
+ void *request, void *answer);
+XBT_PUBLIC(gras_msg_cb_ctx_t)
+
+/** @brief Launch a RPC call, but do not block for the answer
+ * @hideinitializer
+ */
+#define gras_msg_rpc_async_call(server,timeout,msg,req) gras_msg_rpc_async_call_(server,timeout,gras_msgtype_by_name(msg),req)
+ gras_msg_rpc_async_call_(gras_socket_t server,
+ double timeOut,
+ gras_msgtype_t msgtype, void *request);
+XBT_PUBLIC(void) gras_msg_rpc_async_wait(gras_msg_cb_ctx_t ctx, void *answer);
+
+/* server side */
+XBT_PUBLIC(void) gras_msg_rpcreturn(double timeOut, gras_msg_cb_ctx_t ctx,
+ void *answer);