src/thread/pthread_sigmask.c

   1 #include <signal.h>
   2 #include <errno.h>
   3 #include "syscall.h"
   4
   5 int 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 }