869fbfc1f1
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17586 a1c6a512-1295-4272-9138-f99709370657
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Miika Pekkarinen
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include "events.h"
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#include "panic.h"
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#define MAX_SYS_EVENTS 10
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struct sysevent {
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unsigned short id;
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bool oneshot;
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void (*callback)(void *data);
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};
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static struct sysevent events[MAX_SYS_EVENTS];
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bool add_event(unsigned short id, bool oneshot, void (*handler))
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{
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int i;
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/* Check if the event already exists. */
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for (i = 0; i < MAX_SYS_EVENTS; i++)
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{
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if (events[i].callback == handler && events[i].id == id)
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return false;
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}
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/* Try to find a free slot. */
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for (i = 0; i < MAX_SYS_EVENTS; i++)
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{
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if (events[i].callback == NULL)
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{
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events[i].id = id;
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events[i].oneshot = oneshot;
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events[i].callback = handler;
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return true;
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}
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}
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panicf("event line full");
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return false;
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}
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void remove_event(unsigned short id, void (*handler))
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{
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int i;
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for (i = 0; i < MAX_SYS_EVENTS; i++)
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{
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if (events[i].id == id && events[i].callback == handler)
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{
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events[i].callback = NULL;
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return;
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}
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}
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panicf("event %d not found", (int)id);
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}
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void send_event(unsigned short id, void *data)
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{
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int i;
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for (i = 0; i < MAX_SYS_EVENTS; i++)
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{
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if (events[i].id == id && events[i].callback != NULL)
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{
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events[i].callback(data);
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if (events[i].oneshot)
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events[i].callback = NULL;
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}
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}
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}
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