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eventflag API addtiion

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This commit is contained in:
NIIBE Yutaka
2016-05-19 11:48:01 +09:00
parent 1b0fe5a6e8
commit 03bba13005
3 changed files with 50 additions and 30 deletions
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73
eventflag.c
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@@ -41,23 +41,6 @@ eventflag_init (struct eventflag *ev)
}
eventmask_t
eventflag_wait (struct eventflag *ev)
{
int n;
chopstx_mutex_lock (&ev->mutex);
if (!ev->flags)
chopstx_cond_wait (&ev->cond, &ev->mutex);
n = __builtin_ffs (ev->flags);
ev->flags &= ~(1 << (n - 1));
chopstx_mutex_unlock (&ev->mutex);
return (1 << (n - 1));
}
static int
eventflag_check (void *arg)
{
@@ -66,8 +49,9 @@ eventflag_check (void *arg)
return ev->flags != 0;
}
void
eventflag_set_poll_desc (struct eventflag *ev, chopstx_poll_cond_t *poll_desc)
eventflag_prepare_poll (struct eventflag *ev, chopstx_poll_cond_t *poll_desc)
{
poll_desc->type = CHOPSTX_POLL_COND;
poll_desc->ready = 0;
@@ -77,27 +61,60 @@ eventflag_set_poll_desc (struct eventflag *ev, chopstx_poll_cond_t *poll_desc)
poll_desc->arg = ev;
}
eventmask_t
eventflag_wait_timeout (struct eventflag *ev, uint32_t usec)
eventflag_get (struct eventflag *ev)
{
chopstx_poll_cond_t poll_desc;
int n;
eventmask_t em = 0;
eventflag_set_poll_desc (ev, &poll_desc);
chopstx_poll (&usec, 1, &poll_desc);
eventmask_t m;
chopstx_mutex_lock (&ev->mutex);
n = __builtin_ffs (ev->flags);
if (n)
{
em = (1 << (n - 1));
ev->flags &= ~em;
m = (1 << (n - 1));
ev->flags &= ~m;
}
else
m = 0;
chopstx_mutex_unlock (&ev->mutex);
return em;
return m;
}
eventmask_t
eventflag_wait (struct eventflag *ev)
{
int n;
eventmask_t m;
chopstx_mutex_lock (&ev->mutex);
if (!ev->flags)
chopstx_cond_wait (&ev->cond, &ev->mutex);
n = __builtin_ffs (ev->flags);
if (n) /* Always n > 0 when waked up, but make sure no bad things. */
{
m = (1 << (n - 1));
ev->flags &= ~m;
}
else
m = 0;
chopstx_mutex_unlock (&ev->mutex);
return m;
}
eventmask_t
eventflag_wait_timeout (struct eventflag *ev, uint32_t usec)
{
chopstx_poll_cond_t poll_desc;
eventflag_prepare_poll (ev, &poll_desc);
chopstx_poll (&usec, 1, &poll_desc);
return eventflag_get (ev);
}