diplodocus.org Git - nmh/blob - h/signals.h

   1
   2 /*
   3  * signals.h -- header file for nmh signal interface
   4  *
   5  * $Id$
   6  */
   7
   8 #include <config.h>
   9
  10 /*
  11  * The type for a signal handler
  12  */
  13 typedef RETSIGTYPE (*SIGNAL_HANDLER)(int);
  14
  15 /*
  16  * If not a POSIX machine, then we create our
  17  * own POSIX style signal sets functions. This
  18  * currently assumes you have 31 signals, which
  19  * should be true on most pure BSD machines.
  20  */
  21 #ifndef POSIX_SIGNALS
  22 # define sigemptyset(s)    (*(s) = 0)
  23 # define sigfillset(s)     (*(s) = ~((sigset_t) 0), 0)
  24 # define sigaddset(s,n)    (*(s) |=  (1 << ((n) - 1)), 0)
  25 # define sigdelset(s,n)    (*(s) &= ~(1 << ((n) - 1)), 0)
  26 # define sigismember(s,n)  ((*(s) & (1 << ((n) - 1))) != 0)
  27 #endif
  28
  29 /*
  30  * prototypes
  31  */
  32 int SIGPROCMASK (int, const sigset_t *, sigset_t *);
  33 SIGNAL_HANDLER SIGNAL (int, SIGNAL_HANDLER);
  34 SIGNAL_HANDLER SIGNAL2 (int, SIGNAL_HANDLER);