toolchain/gcc/newlib/libc/unix/sigset.c

   1 #include <signal.h>
   2 #include <errno.h>
   3
   4 #if defined(SIG_SETMASK) && NSIG <= 32  /* easier than trying to remove from Makefile */
   5
   6 #undef sigemptyset
   7 int
   8 sigemptyset (sigset_t * set)
   9 {
  10   *set = (sigset_t) 0;
  11   return 0;
  12 }
  13
  14 int
  15 sigfillset (sigset_t * set)
  16 {
  17   *set = ~((sigset_t) 0);
  18   return 0;
  19 }
  20
  21 #undef sigaddset
  22 int
  23 sigaddset (sigset_t * set, int signo)
  24 {
  25   if (signo >= NSIG || signo <= 0)
  26     {
  27       errno = EINVAL;
  28       return -1;
  29     }
  30   *set |= 1 << (signo - 1);
  31   return 0;
  32 }
  33
  34 int
  35 sigdelset (sigset_t * set, int signo)
  36 {
  37   if (signo >= NSIG || signo <= 0)
  38     {
  39       errno = EINVAL;
  40       return -1;
  41     }
  42   *set &= ~(1 << (signo - 1));
  43   return 0;
  44 }
  45
  46 int
  47 sigismember (const sigset_t * set, int signo)
  48 {
  49   if (signo >= NSIG || signo <= 0)
  50     {
  51       errno = EINVAL;
  52       return -1;
  53     }
  54
  55   if (*set & (1 << (signo - 1)))
  56     return 1;
  57   else
  58     return 0;
  59 }
  60
  61 #endif /* SIG_SETMASK */