code.delx.au - gnu-emacs/blob - src/syssignal.h

   1 /* syssignal.h - System-dependent definitions for signals.
   2
   3 Copyright (C) 1993, 1999, 2001-2015 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include <signal.h>
  21
  22 extern void init_signals (bool);
  23
  24 #ifdef HAVE_PTHREAD
  25 #include <pthread.h>
  26 /* If defined, asynchronous signals delivered to a non-main thread are
  27    forwarded to the main thread.  */
  28 #define FORWARD_SIGNAL_TO_MAIN_THREAD
  29 #endif
  30
  31 #if defined HAVE_TIMER_SETTIME && defined SIGEV_SIGNAL
  32 # define HAVE_ITIMERSPEC
  33 #endif
  34
  35 #if (defined SIGPROF && !defined PROFILING \
  36      && (defined HAVE_SETITIMER || defined HAVE_ITIMERSPEC))
  37 # define PROFILER_CPU_SUPPORT
  38 #endif
  39
  40 extern sigset_t empty_mask;
  41
  42 typedef void (*signal_handler_t) (int);
  43
  44 extern void emacs_sigaction_init (struct sigaction *, signal_handler_t);
  45 char const *safe_strsignal (int) ATTRIBUTE_CONST;
  46
  47 #if NSIG < NSIG_MINIMUM
  48 # undef NSIG
  49 # define NSIG NSIG_MINIMUM
  50 #endif
  51
  52 #ifndef SA_SIGINFO
  53 # define SA_SIGINFO 0
  54 #endif
  55
  56 #ifndef emacs_raise
  57 # define emacs_raise(sig) raise (sig)
  58 #endif
  59
  60 #ifndef HAVE_STRSIGNAL
  61 # define strsignal(sig) safe_strsignal (sig)
  62 #endif
  63
  64 void deliver_process_signal (int, signal_handler_t);