make linking of thread-start with explicit scheduling conditional

[musl] / src / thread / pthread_kill.c

diff --git a/src/thread/pthread_kill.c b/src/thread/pthread_kill.c
index 36e9b6d..6d70e62 100644 (file)
--- a/src/thread/pthread_kill.c
+++ b/src/thread/pthread_kill.c
@@ -2,5 +2,10 @@
 
 int pthread_kill(pthread_t t, int sig)
 {
-       return -__syscall(SYS_tgkill, t->pid, t->tid, sig);
+       int r;
+       LOCK(t->killlock);
+       r = t->tid ? -__syscall(SYS_tkill, t->tid, sig)
+               : (sig+0U >= _NSIG ? EINVAL : 0);
+       UNLOCK(t->killlock);
+       return r;
 }