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#include <signal.h>
#include <errno.h>
#include <pthread.h>
#include "syscall.h"
int pthread_sigmask(int how, const sigset_t *set, sigset_t *old)
{
int ret;
if ((unsigned)how - SIG_BLOCK > 2U) return EINVAL;
ret = -__syscall(SYS_rt_sigprocmask, how, set, old, __SYSCALL_SSLEN);
if (!ret && old) {
if (sizeof old->__bits[0] == 8) {
old->__bits[0] &= ~0x380000000ULL;
} else {
old->__bits[0] &= ~0x80000000UL;
old->__bits[1] &= ~0x3UL;
}
}
return ret;
}
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