-/**
- * \file
- * <!--
- * Copyright 2006 Develer S.r.l. (http://www.develer.com/)
- * This file is part of DevLib - See README.devlib for information.
- * -->
- *
- * \brief Simple notifier for the observer/subject pattern (implementation)
- *
- * \version $Id$
- * \author Bernardo Innocenti <bernie@develer.com>
- */
-
-#include "observer.h"
-#include <cfg/cpu.h> // IRQ_DISABLE/IRQ_ENABLE
-
-
-void observer_SetEvent(Observer *observer, void (*event)(int event_id, void *param))
-{
- observer->event = event;
-}
-
-void observer_InitSubject(Subject *subject)
-{
- LIST_INIT(&subject->observers);
-}
-
-void observer_Subscribe(Subject *subject, Observer *observer)
-{
- ATOMIC(ADDHEAD(&subject->observers, &observer->link));
-}
-
-void observer_Unsubscribe(UNUSED_ARG(Subject *,subject), Observer *observer)
-{
- ATOMIC(REMOVE(&observer->link));
-}
-
-void observer_notify(Subject *subject, int event_id, void *param)
-{
- Observer *observer;
- cpuflags_t irqstate;
- IRQ_SAVE_DISABLE(irqstate);
-
- /*
- * Run over list with protection against other
- * threads, but re-enable irqs in callbacks.
- */
- FOREACH_NODE(observer, &subject->observers)
- {
- IRQ_RESTORE(irqstate);
- observer->event(event_id, param);
- IRQ_SAVE_DISABLE(irqstate);
- }
-
- IRQ_RESTORE(irqstate);
-}