X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_mutexattr_setrobust.c;h=04db92a626dbd0b05eac4bcd88363a6e31e54207;hb=1ef37aa00ea830dfda76e04e3d941cafa74d8b76;hp=dcfa4cf1c771c5347240c3bd826448b69f094f06;hpb=0109d950e685f1c5f6cef245a8b1bc47c9b6d94c;p=musl

diff --git a/src/thread/pthread_mutexattr_setrobust.c b/src/thread/pthread_mutexattr_setrobust.c
index dcfa4cf1..04db92a6 100644
--- a/src/thread/pthread_mutexattr_setrobust.c
+++ b/src/thread/pthread_mutexattr_setrobust.c
@@ -1,9 +1,25 @@
 #include "pthread_impl.h"
+#include "syscall.h"
+
+static pthread_once_t check_robust_once;
+static int check_robust_result;
+
+static void check_robust()
+{
+	void *p;
+	size_t l;
+	check_robust_result = -__syscall(SYS_get_robust_list, 0, &p, &l);
+}
 
 int pthread_mutexattr_setrobust(pthread_mutexattr_t *a, int robust)
 {
 	if (robust > 1U) return EINVAL;
+	if (robust) {
+		pthread_once(&check_robust_once, check_robust);
+		if (check_robust_result) return check_robust_result;
+		a->__attr |= 4;
+		return 0;
+	}
 	a->__attr &= ~4;
-	a->__attr |= robust*4;
 	return 0;
 }