1#include <signal.h>
2#include <errno.h>
3#include "syscall.h"
4
5int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict old)
6{
7	int ret;
8	if ((unsigned)how - SIG_BLOCK > 2U) return EINVAL;
9	ret = -__syscall(SYS_rt_sigprocmask, how, set, old, _NSIG/8);
10	if (!ret && old) {
11		if (sizeof old->__bits[0] == 8) {
12			old->__bits[0] &= ~0x380000000ULL;
13		} else {
14			old->__bits[0] &= ~0x80000000UL;
15			old->__bits[1] &= ~0x3UL;
16		}
17	}
18	return ret;
19}
20