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intr_event(9): update the example of swi_add()

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Reviewed by:	jhb
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D33476
This commit is contained in:
Mitchell Horne 2022-10-15 15:34:44 -03:00
parent 3cdbaee354
commit 0cec1648b4
1 changed files with 18 additions and 17 deletions
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35
share/man/man9/intr_event.9
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@ -200,39 +200,40 @@ function returns a process priority corresponding to the passed in interrupt
flags.
.Sh EXAMPLES
The
.Fn swi_add
.Xr swi_add 9
function demonstrates the use of
.Fn intr_event_create
and
.Fn intr_event_add_handler .
.Bd -literal -offset indent
int
swi_add(struct ithd **ithdp, const char *name, driver_intr_t handler,
void *arg, int pri, enum intr_type flags, void **cookiep)
swi_add(struct intr_event **eventp, const char *name, driver_intr_t handler,
void *arg, int pri, enum intr_type flags, void **cookiep)
{
struct proc *p;
struct ithd *ithd;
int error;
struct intr_event *ie;
int error = 0;
if (flags & INTR_ENTROPY)
return (EINVAL);
ithd = (ithdp != NULL) ? *ithdp : NULL;
ie = (eventp != NULL) ? *eventp : NULL;
if (ithd != NULL) {
if ((ithd->it_flags & IT_SOFT) == 0)
return(EINVAL);
if (ie != NULL) {
if (!(ie->ie_flags & IE_SOFT))
return (EINVAL);
} else {
error = ithread_create(&ithd, pri, IT_SOFT, NULL, NULL,
"swi%d:", pri);
error = intr_event_create(&ie, NULL, IE_SOFT, 0,
NULL, NULL, NULL, swi_assign_cpu, "swi%d:", pri);
if (error)
return (error);
if (ithdp != NULL)
*ithdp = ithd;
if (eventp != NULL)
*eventp = ie;
}
return (ithread_add_handler(ithd, name, handler, arg, pri + PI_SOFT,
flags, cookiep));
if (handler != NULL) {
error = intr_event_add_handler(ie, name, NULL, handler, arg,
PI_SWI(pri), flags, cookiep);
}
return (error);
}
.Ed
.Sh ERRORS