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/*
* Linux event functions.
*
* Copyright (C) 2009 Cambridge Silicon Radio Ltd.
*
* Refer to LICENSE.txt included with this source code for details on
* the license terms.
*/
#include <linux/module.h>
#include <linux/sched.h>
#include "event.h"
void os_event_init(os_event_t *evt)
{
init_waitqueue_head(&evt->wq);
spin_lock_init(&evt->lock);
evt->events = 0;
}
EXPORT_SYMBOL(os_event_init);
uint16_t os_event_wait(os_event_t *evt)
{
uint16_t e;
unsigned long flags;
wait_event(evt->wq, evt->events != 0);
spin_lock_irqsave(&evt->lock, flags);
e = evt->events;
evt->events &= ~e;
spin_unlock_irqrestore(&evt->lock, flags);
return e;
}
EXPORT_SYMBOL(os_event_wait);
uint16_t os_event_wait_interruptible(os_event_t *evt)
{
uint16_t e;
unsigned long flags;
wait_event_interruptible(evt->wq, evt->events != 0);
spin_lock_irqsave(&evt->lock, flags);
e = evt->events;
evt->events &= ~e;
spin_unlock_irqrestore(&evt->lock, flags);
return e;
}
EXPORT_SYMBOL(os_event_wait_interruptible);
uint16_t os_event_wait_timed(os_event_t *evt, unsigned timeout_ms)
{
uint16_t e;
unsigned long flags;
wait_event_interruptible_timeout(evt->wq,
evt->events != 0,
msecs_to_jiffies(timeout_ms));
spin_lock_irqsave(&evt->lock, flags);
e = evt->events;
evt->events &= ~e;
spin_unlock_irqrestore(&evt->lock, flags);
return e;
}
EXPORT_SYMBOL(os_event_wait_timed);
void os_event_raise(os_event_t *evt, uint16_t events)
{
unsigned long flags;
spin_lock_irqsave(&evt->lock, flags);
evt->events |= events;
spin_unlock_irqrestore(&evt->lock, flags);
wake_up(&evt->wq);
}
EXPORT_SYMBOL(os_event_raise);
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