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authorJosé Bollo <jose.bollo@iot.bzh>2017-09-21 13:11:02 +0200
committerJosé Bollo <jose.bollo@iot.bzh>2017-10-09 14:08:32 +0200
commitc12c74c208a30c5b18716b8faa464f0b4f643255 (patch)
treecdc3d6d44a7105aa43173601acbfbec7ed53e5fd /include/afb/afb-event.h
parent271bb6fc606fc5068a7b7a8f22b0052aca2fb900 (diff)
Introduce afb_eventid
This new name is better suited because it is not an event but the id of an event. This also prepares the new api with pointers. Change-Id: I7be88bb36cf72bf7df70793a77452e405130b951 Signed-off-by: José Bollo <jose.bollo@iot.bzh>
Diffstat (limited to 'include/afb/afb-event.h')
-rw-r--r--include/afb/afb-event.h98
1 files changed, 98 insertions, 0 deletions
diff --git a/include/afb/afb-event.h b/include/afb/afb-event.h
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+++ b/include/afb/afb-event.h
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+/*
+ * Copyright (C) 2016, 2017 "IoT.bzh"
+ * Author: José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "afb-eventid-itf.h"
+
+/*
+ * Describes the request of afb-daemon for bindings
+ */
+struct afb_event
+{
+ const struct afb_eventid_itf *itf; /* the interface to use */
+ struct afb_eventid *closure; /* the closure argument for functions of 'itf' */
+};
+
+/*
+ * Checks wether the 'event' is valid or not.
+ *
+ * Returns 0 if not valid or 1 if valid.
+ */
+static inline int afb_event_is_valid(struct afb_event event)
+{
+ return !!event.itf;
+}
+
+/*
+ * Broadcasts widely the 'event' with the data 'object'.
+ * 'object' can be NULL.
+ *
+ * For convenience, the function calls 'json_object_put' for 'object'.
+ * Thus, in the case where 'object' should remain available after
+ * the function returns, the function 'json_object_get' shall be used.
+ *
+ * Returns the count of clients that received the event.
+ */
+static inline int afb_event_broadcast(struct afb_event event, struct json_object *object)
+{
+ return event.itf->broadcast(event.closure, object);
+}
+
+/*
+ * Pushes the 'event' with the data 'object' to its observers.
+ * 'object' can be NULL.
+ *
+ * For convenience, the function calls 'json_object_put' for 'object'.
+ * Thus, in the case where 'object' should remain available after
+ * the function returns, the function 'json_object_get' shall be used.
+ *
+ * Returns the count of clients that received the event.
+ */
+static inline int afb_event_push(struct afb_event event, struct json_object *object)
+{
+ return event.itf->push(event.closure, object);
+}
+
+/* OBSOLETE */
+#define afb_event_drop afb_event_unref
+
+/*
+ * Gets the name associated to the 'event'.
+ */
+static inline const char *afb_event_name(struct afb_event event)
+{
+ return event.itf->name(event.closure);
+}
+
+/*
+ * Decreases the count of reference to 'event' and
+ * destroys the event when the reference count falls to zero.
+ */
+static inline void afb_event_unref(struct afb_event event)
+{
+ event.itf->unref(event.closure);
+}
+
+/*
+ * Increases the count of reference to 'event'
+ */
+static inline void afb_event_addref(struct afb_event event)
+{
+ event.itf->addref(event.closure);
+}
+