Add hooking for events

[src/app-framework-binder.git] / src / afb-evt.c

diff --git a/src/afb-evt.c b/src/afb-evt.c
index 7b7ce4f..d80af04 100644 (file)
--- a/src/afb-evt.c
+++ b/src/afb-evt.c
@@ -28,6 +28,7 @@
 #include <afb/afb-event-itf.h>
 
 #include "afb-evt.h"
+#include "afb-hook.h"
 #include "verbose.h"
 
 struct afb_evt_watch;
@@ -70,6 +71,9 @@ struct afb_evt_event {
        /* id of the event */
        int id;
 
+       /* hooking */
+       int hookflags;
+
        /* mutex of the event */
        pthread_mutex_t mutex;
 
@@ -123,40 +127,55 @@ static int event_id_counter = 0;
 static int event_id_wrapped = 0;
 
 /*
- * Broadcasts the event 'evt' with its 'object'
- * 'object' is released (like json_object_put)
- * Returns the count of listener that received the event.
- */
-static int evt_broadcast(struct afb_evt_event *evt, struct json_object *object)
-{
-       return afb_evt_broadcast(evt->name, object);
-}
-
-/*
- * Broadcasts the 'event' with its 'object'
- * 'object' is released (like json_object_put)
+ * Broadcasts the 'event' of 'id' with its 'obj'
+ * 'obj' is released (like json_object_put)
+ * calls hooks if hookflags isn't 0
  * Returns the count of listener having receive the event.
  */
-int afb_evt_broadcast(const char *event, struct json_object *object)
+static int broadcast(const char *event, struct json_object *obj, int id, int hookflags)
 {
        int result;
        struct afb_evt_listener *listener;
 
+       if (hookflags & afb_hook_flag_evt_broadcast_before)
+               afb_hook_evt_broadcast_before(event, id, obj);
        result = 0;
        pthread_mutex_lock(&listeners_mutex);
        listener = listeners;
        while(listener) {
                if (listener->itf->broadcast != NULL) {
-                       listener->itf->broadcast(listener->closure, event, 0, json_object_get(object));
+                       listener->itf->broadcast(listener->closure, event, id, json_object_get(obj));
                        result++;
                }
                listener = listener->next;
        }
        pthread_mutex_unlock(&listeners_mutex);
-       json_object_put(object);
+       if (hookflags & afb_hook_flag_evt_broadcast_after)
+               afb_hook_evt_broadcast_after(event, id, obj, result);
+       json_object_put(obj);
        return result;
 }
 
+/*
+ * Broadcasts the event 'evt' with its 'object'
+ * 'object' is released (like json_object_put)
+ * Returns the count of listener that received the event.
+ */
+static int evt_broadcast(struct afb_evt_event *evt, struct json_object *object)
+{
+       return broadcast(evt->name, object, evt->id, evt->hookflags);
+}
+
+/*
+ * Broadcasts the 'event' with its 'object'
+ * 'object' is released (like json_object_put)
+ * Returns the count of listener having receive the event.
+ */
+int afb_evt_broadcast(const char *event, struct json_object *object)
+{
+       return broadcast(event, object, 0, -1);
+}
+
 /*
  * Pushes the event 'evt' with 'obj' to its listeners
  * 'obj' is released (like json_object_put)
@@ -170,6 +189,8 @@ static int evt_push(struct afb_evt_event *evt, struct json_object *obj)
 
        result = 0;
        pthread_mutex_lock(&evt->mutex);
+       if (evt->hookflags & afb_hook_flag_evt_push_before)
+               afb_hook_evt_push_before(evt->name, evt->id, obj);
        watch = evt->watchs;
        while(watch) {
                listener = watch->listener;
@@ -180,6 +201,8 @@ static int evt_push(struct afb_evt_event *evt, struct json_object *obj)
                }
                watch = watch->next_by_event;
        }
+       if (evt->hookflags & afb_hook_flag_evt_push_after)
+               afb_hook_evt_push_after(evt->name, evt->id, obj, result);
        pthread_mutex_unlock(&evt->mutex);
        json_object_put(obj);
        return result;
@@ -190,6 +213,8 @@ static int evt_push(struct afb_evt_event *evt, struct json_object *obj)
  */
 static const char *evt_name(struct afb_evt_event *evt)
 {
+       if (evt->hookflags & afb_hook_flag_evt_name)
+               afb_hook_evt_name(evt->name, evt->id);
        return evt->name;
 }
 
@@ -256,6 +281,10 @@ static void evt_destroy(struct afb_evt_event *evt)
                                pthread_mutex_unlock(&listener->mutex);
                        }
 
+                       /* hook */
+                       if (evt->hookflags & afb_hook_flag_evt_drop)
+                               afb_hook_evt_drop(evt->name, evt->id);
+
                        /* free */
                        pthread_mutex_destroy(&evt->mutex);
                        free(evt);
@@ -303,6 +332,9 @@ struct afb_event afb_evt_create_event(const char *name)
        evt->id = event_id_counter;
        pthread_mutex_init(&evt->mutex, NULL);
        events = evt;
+       evt->hookflags = afb_hook_flags_evt(evt->name);
+       if (evt->hookflags & afb_hook_flag_evt_create)
+               afb_hook_evt_create(evt->name, evt->id);
        pthread_mutex_unlock(&events_mutex);
 
        /* returns the event */
@@ -497,3 +529,16 @@ int afb_evt_remove_watch(struct afb_evt_listener *listener, struct afb_event eve
        return -1;
 }
 
+/*
+ * update the hooks for events
+ */
+void afb_evt_update_hooks()
+{
+       struct afb_evt_event *evt;
+
+       pthread_mutex_lock(&events_mutex);
+       for (evt = events ; evt ; evt = evt->next)
+               evt->hookflags = afb_hook_flags_evt(evt->name);
+       pthread_mutex_unlock(&events_mutex);
+}
+