#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);
-}
+static volatile int check_robust_result = -1;
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;
+ 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;
}