X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_mutexattr_setrobust.c;h=30a9ac3bea559bb54b762c7df04e0fa035d3ec1e;hb=f897461d4fe72bb71854a6d0662de83008caccb7;hp=dcfa4cf1c771c5347240c3bd826448b69f094f06;hpb=12e1e324683a1d381b7f15dd36c99b37dd44d940;p=musl

diff --git a/src/thread/pthread_mutexattr_setrobust.c b/src/thread/pthread_mutexattr_setrobust.c
index dcfa4cf1..30a9ac3b 100644
--- a/src/thread/pthread_mutexattr_setrobust.c
+++ b/src/thread/pthread_mutexattr_setrobust.c
@@ -1,9 +1,23 @@
 #include "pthread_impl.h"
+#include "syscall.h"
+
+static volatile int check_robust_result = -1;
 
 int pthread_mutexattr_setrobust(pthread_mutexattr_t *a, int robust)
 {
 	if (robust > 1U) return EINVAL;
+	if (robust) {
+		int r = check_robust_result;
+		if (r < 0) {
+			void *p;
+			size_t l;
+			r = -__syscall(SYS_get_robust_list, 0, &p, &l);
+			a_store(&check_robust_result, r);
+		}
+		if (r) return r;
+		a->__attr |= 4;
+		return 0;
+	}
 	a->__attr &= ~4;
-	a->__attr |= robust*4;
 	return 0;
 }