Improve documentation of api v3

[src/app-framework-binder.git] / docs / reference-v3 / func-service.md

diff --git a/docs/reference-v3/func-service.md b/docs/reference-v3/func-service.md
new file mode 100644 (file)
index 0000000..b18c486
--- /dev/null
+++ b/docs/reference-v3/func-service.md
@@ -0,0 +1,59 @@
+Functions of class afb_service
+==============================
+
+All the functions of the class **afb_daemon** use the default api.
+This are internally aliased to the corresponding legacy function of
+class **afb_api**.
+
+```C
+/**
+ * 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. 'status' a status being 0 on success or negative when an error occured,
+ *  2. 'result' the resulting data as a JSON object.
+ *
+ * @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 callback The to call on completion
+ * @param callback_closure The closure to pass to the callback
+ *
+ * @see also 'afb_req_subcall'
+ */
+void afb_service_call(
+       const char *api,
+       const char *verb,
+       struct json_object *args,
+       void (*callback)(void*closure, int status, struct json_object *result),
+       void *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 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 0 in case of success or a negative value in case of error.
+ *
+ * @see also 'afb_req_subcall'
+ */
+int afb_service_call_sync(
+       const char *api,
+       const char *verb,
+       struct json_object *args,
+       struct json_object **result);
+```
\ No newline at end of file