newlib/libc/unix/sigset.c

   1 #ifndef _NO_SIGSET
   2
   3 #include <signal.h>
   4 #include <errno.h>
   5
   6 #if defined(SIG_SETMASK) && NSIG <= 32  /* easier than trying to remove from Makefile */
   7
   8 #undef sigemptyset
   9 int
  10 sigemptyset (sigset_t * set)
  11 {
  12   *set = (sigset_t) 0;
  13   return 0;
  14 }
  15
  16 #undef sigfillset
  17 int
  18 sigfillset (sigset_t * set)
  19 {
  20   *set = ~((sigset_t) 0);
  21   return 0;
  22 }
  23
  24 #undef sigaddset
  25 int
  26 sigaddset (sigset_t * set, int signo)
  27 {
  28   if (signo >= NSIG || signo <= 0)
  29     {
  30       errno = EINVAL;
  31       return -1;
  32     }
  33   *set |= 1 << (signo - 1);
  34   return 0;
  35 }
  36
  37 #undef sigdelset
  38 int
  39 sigdelset (sigset_t * set, int signo)
  40 {
  41   if (signo >= NSIG || signo <= 0)
  42     {
  43       errno = EINVAL;
  44       return -1;
  45     }
  46   *set &= ~(1 << (signo - 1));
  47   return 0;
  48 }
  49
  50 #undef sigismember
  51 int
  52 sigismember (const sigset_t * set, int signo)
  53 {
  54   if (signo >= NSIG || signo <= 0)
  55     {
  56       errno = EINVAL;
  57       return -1;
  58     }
  59
  60   if (*set & (1 << (signo - 1)))
  61     return 1;
  62   else
  63     return 0;
  64 }
  65
  66 #endif /* SIG_SETMASK */
  67 #endif /* _NO_SIGSET  */