_sigprocmask
n = _sigprocmask(SIG_SETMASK, &set, &oset);
n = _sigprocmask(SIG_BLOCK, &set, &oset);
_sigprocmask(SIG_BLOCK, &set, &oset);
_sigprocmask(SIG_SETMASK, &oset, NULL);
_sigprocmask(SIG_BLOCK, &set, &oset);
_sigprocmask(SIG_SETMASK, &oset, NULL);
if (_sigprocmask(how, set, oset))
_sigprocmask(SIG_SETMASK, &sa->sa_sigmask, NULL);
_sigprocmask(SIG_BLOCK, &sigset, &sigoset);
_sigprocmask(SIG_SETMASK, &sigoset, NULL);
_sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock);
_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
#define sigprocmask _sigprocmask
_sigprocmask(SIG_BLOCK, (const sigset_t *)&newmask, &oldmask);
_sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
_sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
_sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
_sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
_sigprocmask(SIG_BLOCK, &mask, NULL);
_sigprocmask(SIG_BLOCK, &set, &oset);
_sigprocmask(SIG_SETMASK, &oset, NULL);
_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
_sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock);
_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
__strong_reference(_sigprocmask, sigprocmask);
if (_sigprocmask(how, set, oset))