1 files changed, 88 insertions, 0 deletions

diff --git a/firmware/events.c b/firmware/events.c
new file mode 100644
index 0000000000..eaf2e5c352
--- /dev/null
+++ b/firmware/events.c
@@ -0,0 +1,88 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Miika Pekkarinen
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <stdio.h>
+#include "events.h"
+#include "panic.h"
+
+struct sysevent {
+    unsigned short id;
+    void (*callback)(void *data);
+};
+
+struct sysevent events[MAX_SYS_EVENTS];
+
+bool add_event(unsigned short id, void (*handler))
+{
+    int i;
+    
+    /* Chcek if the event already exists. */
+    for (i = 0; i < MAX_SYS_EVENTS; i++)
+    {
+        if (events[i].callback == handler && events[i].id == id)
+            return false;
+    }
+    
+    /* Try to find a free slot. */
+    for (i = 0; i < MAX_SYS_EVENTS; i++)
+    {
+        if (events[i].callback == NULL)
+        {
+            events[i].id = id;
+            events[i].callback = handler;
+            return true;
+        }
+    }
+    
+    panicf("event line full");
+    return false;
+}
+
+void remove_event(unsigned short id, void (*handler))
+{
+    int i;
+    
+    for (i = 0; i < MAX_SYS_EVENTS; i++)
+    {
+        if (events[i].id == id && events[i].callback == handler)
+        {
+            events[i].callback = NULL;
+            return;
+        }
+    }
+    
+    panicf("event not found");
+}
+
+void send_event(unsigned short id, bool oneshot, void *data)
+{
+    int i;
+    
+    for (i = 0; i < MAX_SYS_EVENTS; i++)
+    {
+        if (events[i].id == id && events[i].callback != NULL)
+        {
+            events[i].callback(data);
+            
+            if (oneshot)
+                events[i].callback = NULL;
+        }
+    }
+}
+