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1. msleep returns EWOULDBLOCK not ETIMEDOUT, use EWOULDBLOCK instead.

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2. Eliminate a possible lock leak in timed wait loop.
This commit is contained in:
David Xu 2004-12-18 13:43:16 +00:00
parent 50586e8b6b
commit 839f811c6a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=139014
1 changed files with 6 additions and 8 deletions
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14
sys/kern/kern_umtx.c
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@ -525,12 +525,12 @@ do_lock(struct thread *td, struct umtx *umtx, long id,
timespecsub(&ts1, &ts2);
TIMESPEC_TO_TIMEVAL(&tv, &ts1);
if (tv.tv_sec < 0) {
error = ETIMEDOUT;
error = EWOULDBLOCK;
break;
}
timo = tvtohz(&tv);
error = _do_lock(td, umtx, id, timo);
if (error != ETIMEDOUT) {
if (error != EWOULDBLOCK) {
if (error == ERESTART)
error = EINTR;
break;
@ -689,22 +689,20 @@ do_unlock_and_wait(struct thread *td, struct umtx *umtx, long id, void *uaddr,
timespecsub(&ts1, &ts2);
TIMESPEC_TO_TIMEVAL(&tv, &ts1);
if (tv.tv_sec < 0) {
error = ETIMEDOUT;
error = EWOULDBLOCK;
break;
}
timo = tvtohz(&tv);
umtxq_lock(&uq.uq_key);
if (td->td_flags & TDF_UMTXQ) {
error = umtxq_sleep(td, &uq.uq_key,
td->td_priority | PCATCH,
"ucond", timo);
td->td_priority | PCATCH | PDROP,
"ucond", timo);
if (!(td->td_flags & TDF_UMTXQ)) {
umtxq_unlock(&uq.uq_key);
error = 0;
break;
}
if (error != 0 && error != ETIMEDOUT) {
umtxq_unlock(&uq.uq_key);
if (error != 0 && error != EWOULDBLOCK) {
if (error == ERESTART)
error = EINTR;
break;