int wd_gettime(WDOG_ID wdog)
{
irqstate_t flags;
/* Verify the wdog */
flags = irqsave();
if (wdog && WDOG_ISACTIVE(wdog))
{
/* Traverse the watchdog list accumulating lag times until we find the wdog
* that we are looking for
*/
FAR struct wdog_s *curr;
int delay = 0;
for (curr = (FAR struct wdog_s *)g_wdactivelist.head; curr; curr = curr->next)
{
delay += curr->lag;
if (curr == wdog)
{
irqrestore(flags);
return delay;
}
}
}
irqrestore(flags);
return 0;
}
int wd_delete(WDOG_ID wdog)
{
irqstate_t state;
DEBUGASSERT(wdog);
/* The following steps are atomic... the watchdog must not be active when
* it is being deallocated.
*/
state = irqsave();
/* Check if the watchdog has been started. */
if (WDOG_ISACTIVE(wdog))
{
/* Yes.. stop it */
wd_cancel(wdog);
}
/* Did this watchdog come from the pool of pre-allocated timers? Or, was
* it allocated from the heap?
*/
if (WDOG_ISALLOCED(wdog))
{
/* It was allocated from the heap. Use sched_kfree() to release the
* memory. If the timer was released from an interrupt handler,
* sched_kfree() will defer the actual deallocation of the memory
* until a more appropriate time.
*
* We don't need interrupts disabled to do this.
*/
irqrestore(state);
sched_kfree(wdog);
}
/* This was a pre-allocated timer. This function should not be called for
* statically allocated timers.
*/
else if (!WDOG_ISSTATIC(wdog))
{
/* Put the timer back on the free list and increment the count of free
* timers, all with interrupts disabled.
*/
sq_addlast((FAR sq_entry_t *)wdog, &g_wdfreelist);
g_wdnfree++;
DEBUGASSERT(g_wdnfree <= CONFIG_PREALLOC_WDOGS);
irqrestore(state);
}
/* Return success */
return OK;
}