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drivers/timers/timer: Add option for non-periodic notification 

Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
This commit is contained in:
Petro Karashchenko 2022-03-14 21:54:15 +01:00 committed by Xiang Xiao
parent b04447d066
commit f30fa2fe57
2 changed files with 9 additions and 9 deletions
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17
drivers/timers/timer.c
View File

@ -72,11 +72,11 @@ static bool timer_notifier(FAR uint32_t *next_interval_us, FAR void *arg);
static int timer_open(FAR struct file *filep);
static int timer_close(FAR struct file *filep);
static ssize_t timer_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
size_t buflen);
static ssize_t timer_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen);
size_t buflen);
static int timer_ioctl(FAR struct file *filep, int cmd,
unsigned long arg);
unsigned long arg);
/****************************************************************************
* Private Data
@ -119,10 +119,9 @@ static bool timer_notifier(FAR uint32_t *next_interval_us, FAR void *arg)
/* Signal the waiter.. if there is one */
nxsig_notification(notify->pid, &notify->event,
SI_QUEUE, &upper->work);
nxsig_notification(notify->pid, &notify->event, SI_QUEUE, &upper->work);
return true;
return !notify->oneshot;
}
/****************************************************************************
@ -378,8 +377,8 @@ static int timer_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
if (notify != NULL)
{
memcpy(&upper->notify, notify, sizeof(*notify));
ret = timer_setcallback((FAR void *)upper,
timer_notifier, upper);
ret = timer_setcallback((FAR void *)upper, timer_notifier,
(FAR void *)upper);
}
else
{
@ -399,7 +398,7 @@ static int timer_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
if (lower->ops->maxtimeout) /* Optional */
{
ret = lower->ops->maxtimeout(lower, (uint32_t *)arg);
ret = lower->ops->maxtimeout(lower, (FAR uint32_t *)arg);
}
else
{

1
include/nuttx/timers/timer.h
View File

@ -116,6 +116,7 @@ struct timer_notify_s
{
struct sigevent event; /* Describe the way a task is to be notified */
pid_t pid; /* The ID of the task/thread to receive the signal */
bool oneshot; /* Single notification or periodic notifications */
};
/* This structure provides the "lower-half" driver operations available to