1#include "pthread_impl.h"
 2#include "syscall.h"
 3
 4static volatile int check_robust_result = -1;
 5
 6int pthread_mutexattr_setrobust(pthread_mutexattr_t *a, int robust)
 7{
 8#ifdef __wasilibc_unmodified_upstream
 9	if (robust > 1U) return EINVAL;
10	if (robust) {
11		int r = check_robust_result;
12		if (r < 0) {
13			void *p;
14			size_t l;
15			r = -__syscall(SYS_get_robust_list, 0, &p, &l);
16			a_store(&check_robust_result, r);
17		}
18		if (r) return r;
19		a->__attr |= 4;
20		return 0;
21	}
22	a->__attr &= ~4;
23	return 0;
24#else
25	if (robust) return EINVAL;
26	return 0;
27#endif
28}