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/*
* Copyright © 2016 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <ao.h>
#include <ao_power.h>
static struct ao_power *head, *tail;
void
ao_power_register(struct ao_power *power)
{
if (power->registered)
return;
power->registered = true;
if (tail) {
tail->next = power;
power->prev = tail;
tail = power;
} else {
head = tail = power;
}
#ifdef AO_LED_POWER
ao_led_on(AO_LED_POWER);
#endif
}
void
ao_power_unregister(struct ao_power *power)
{
if (!power->registered)
return;
power->registered = false;
if (power->prev)
power->prev->next = power->next;
else
head = power->next;
if (power->next)
power->next->prev = power->prev;
else
tail = power->prev;
}
void
ao_power_suspend(void)
{
struct ao_power *p;
#ifdef AO_LED_POWER
ao_led_off(AO_LED_POWER);
#endif
for (p = tail; p; p = p->prev)
p->suspend(p->arg);
}
void
ao_power_resume(void)
{
struct ao_power *p;
for (p = head; p; p = p->next)
p->resume(p->arg);
#ifdef AO_LED_POWER
ao_led_on(AO_LED_POWER);
#endif
}
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