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Add a new feature to thr_kill, if thread ID argument is -1, send

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signals to all threads except current sender.
This commit is contained in:
David Xu 2006-01-07 03:15:21 +00:00
parent 75d6a87fa3
commit 0a5cd498bb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=154093
1 changed files with 27 additions and 12 deletions
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39
sys/kern/kern_thr.c
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@ -310,19 +310,34 @@ thr_kill(struct thread *td, struct thr_kill_args *uap)
p = td->td_proc;
error = 0;
PROC_LOCK(p);
ttd = thread_find(p, uap->id);
if (ttd == NULL) {
error = ESRCH;
goto out;
if (uap->id == -1) {
if (uap->sig != 0 && !_SIG_VALID(uap->sig)) {
error = EINVAL;
} else {
error = ESRCH;
FOREACH_THREAD_IN_PROC(p, ttd) {
if (ttd != td) {
error = 0;
if (uap->sig == 0)
break;
tdsignal(p, ttd, uap->sig, NULL);
}
}
}
} else {
if (uap->id != td->td_tid)
ttd = thread_find(p, uap->id);
else
ttd = td;
if (ttd == NULL)
error = ESRCH;
else if (uap->sig == 0)
;
else if (!_SIG_VALID(uap->sig))
error = EINVAL;
else
tdsignal(p, ttd, uap->sig, NULL);
}
if (uap->sig == 0)
goto out;
if (!_SIG_VALID(uap->sig)) {
error = EINVAL;
goto out;
}
tdsignal(p, ttd, uap->sig, NULL);
out:
PROC_UNLOCK(p);
return (error);
}