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Add a new flag, EV_CANCELED, and use it to make g_waitfor_event() return

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EAGAIN if an event got canceled.
This commit is contained in:
Poul-Henning Kamp 2003-05-01 19:43:52 +00:00
parent eb8c9e95a5
commit c8589ad169
1 changed files with 5 additions and 1 deletions
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6
sys/geom/geom_event.c
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@ -72,6 +72,7 @@ struct g_event {
#define EV_DONE 0x80000
#define EV_WAKEUP 0x40000
#define EV_CANCELED 0x20000
void
g_waitidle(void)
@ -230,6 +231,7 @@ g_cancel_event(void *ref)
ep->func(ep->arg, EV_CANCEL);
if (ep->flag & EV_WAKEUP) {
ep->flag |= EV_DONE;
ep->flag |= EV_CANCELED;
wakeup(ep);
} else {
g_destroy_event(ep);
@ -310,8 +312,10 @@ g_waitfor_event(g_event_t *func, void *arg, int flag, ...)
do
tsleep(ep, PRIBIO, "g_waitfor_event", hz);
while (!(ep->flag & EV_DONE));
if (ep->flag & EV_CANCELED)
error = EAGAIN;
g_destroy_event(ep);
return (0);
return (error);
}
void