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Linux Cross Reference
Linux/arch/um/kernel/signal_user.c

Version: ~ [ 0.6-2.3.46 ] ~
Architecture: ~ [ um ] ~ 
** Warning: Cannot open xref database.

  1 #include <stdlib.h>
  2 #include <signal.h>
  3 #include "user_util.h"
  4 #include "user.h"
  5 
  6 /* XXX These need to be per-cpu */
  7 
  8 static sigset_t none_mask;
  9 static sigset_t handled_mask;
 10 
 11 unsigned long save_sigmask(void)
 12 {
 13   sigset_t current_mask;
 14 
 15   sigprocmask(SIG_BLOCK, &none_mask, &current_mask);
 16   /* XXX Yuck */
 17   return(current_mask.__val[0]);
 18 }
 19 
 20 void restore_sigmask(unsigned long flags)
 21 {
 22   sigset_t current_mask;
 23 
 24   sigemptyset(&current_mask);
 25   current_mask.__val[0] = flags;
 26   sigprocmask(SIG_SETMASK, &current_mask, NULL);
 27 }
 28 
 29 void signal_init(void)
 30 {
 31   sigemptyset(&none_mask);
 32   sigprocmask(SIG_SETMASK, &none_mask, &handled_mask);
 33 }
 34 
 35 void *add_signal_handler(int sig, void (*handler)(int))
 36 {
 37   void *old;
 38 
 39   if(sig > 8 * sizeof(int)) panic("signal number >= %d", 8 * sizeof(int));
 40   sigaddset(&handled_mask, sig);
 41   old = signal(sig, handler);
 42   if(old < 0) return(old);
 43   else return(0);
 44 }
 45
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