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/***************************************************************************
* __________ __ ___.
* 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"
#define MAX_SYS_EVENTS 16
struct sysevent {
unsigned short id;
bool oneshot;
void (*callback)(void *data);
};
static struct sysevent events[MAX_SYS_EVENTS];
bool add_event(unsigned short id, bool oneshot, void (*handler))
{
int i;
/* Check 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].oneshot = oneshot;
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 %d not found", (int)id);
}
void send_event(unsigned short id, 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 (events[i].oneshot)
events[i].callback = NULL;
}
}
}
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