Add 'afb_service_call_sync' function

This new function allows to call features for the
services synchronously.

Also refactoring how are handled arguments to
calls. The call to 'json_object_put' is now always
done by the binder.

Change-Id: I910517da75b179aeafc824da4ce29bc299711990
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

1 files changed, 32 insertions, 2 deletions

diff --git a/include/afb/afb-service-v1.h b/include/afb/afb-service-v1.h
index 6e85a293..f3f55a56 100644
--- a/include/afb/afb-service-v1.h
+++ b/include/afb/afb-service-v1.h
@@ -21,6 +21,10 @@
  * Calls the 'verb' of the 'api' with the arguments 'args' and 'verb' in the name of the binding.
  * The result of the call is delivered to the 'callback' function with the 'callback_closure'.
  *
+ * For convenience, the function calls 'json_object_put' for 'args'.
+ * Thus, in the case where 'args' should remain available after
+ * the function returns, the function 'json_object_get' shall be used.
+ *
  * The 'callback' receives 3 arguments:
  *  1. 'closure' the user defined closure pointer 'callback_closure',
  *  2. 'iserror' a boolean status being true (not null) when an error occured,
@@ -33,8 +37,6 @@
  * @param callback The to call on completion
  * @param callback_closure The closure to pass to the callback
  *
- * @returns 0 in case of success or -1 in case of error.
- *
  * @see also 'afb_req_subcall'
  */
 static inline void afb_service_call_v1(
@@ -48,3 +50,31 @@ static inline void afb_service_call_v1(
 	service.itf->call(service.closure, api, verb, args, callback, callback_closure);
 }
 
+/**
+ * Calls the 'verb' of the 'api' with the arguments 'args' and 'verb' in the name of the binding.
+ * 'result' will receive the response.
+ *
+ * For convenience, the function calls 'json_object_put' for 'args'.
+ * Thus, in the case where 'args' should remain available after
+ * the function returns, the function 'json_object_get' shall be used.
+ *
+ * @param service  The service as received during initialisation
+ * @param api      The api name of the method to call
+ * @param verb     The verb name of the method to call
+ * @param args     The arguments to pass to the method
+ * @param result   Where to store the result - should call json_object_put on it -
+ *
+ * @returns 1 in case of success or 0 in case of error.
+ *
+ * @see also 'afb_req_subcall'
+ */
+static inline int afb_service_call_sync_v1(
+	struct afb_service service,
+	const char *api,
+	const char *verb,
+	struct json_object *args,
+	struct json_object **result)
+{
+	return service.itf->call_sync(service.closure, api, verb, args, result);
+}
+