lib/libc/signal/pthread_sigmask.c


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#define __ASSEMBLY__
#include <asm-generic/signal.h> // for SIGRTMIN

#undef __ASSEMBLY__

#include <errno.h>  // for errno
#include <libc.h>   // for unlikely
#include <stddef.h> // for NULL

typedef __UINT64_TYPE__ sigset_t;

int sigdelset(sigset_t *, int);
int sigismember(const sigset_t *, int);
int sigprocmask(int, const sigset_t *restrict, sigset_t *restrict);

int pthread_sigmask(int how, const sigset_t *restrict set,
		    sigset_t *restrict oset)
{
	sigset_t lset;

	if (set != NULL && (unlikely(sigismember(set, SIGRTMIN)) ||
			    unlikely(sigismember(set, SIGRTMIN + 1)))) {
		lset = *set;
		sigdelset(&lset, SIGRTMIN);
		sigdelset(&lset, SIGRTMIN + 1);
		set = &lset;
	}

	return sigprocmask(how, set, oset) == -1 ? errno : 0;
}