src/syssignal.h

   1 /* syssignal.h - System-dependent definitions for signals.
   2
   3 Copyright (C) 1993, 1999, 2001-2013 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 #include <stdbool.h>
  22
  23 extern void init_signals (bool);
  24
  25 #ifdef HAVE_PTHREAD
  26 #include <pthread.h>
  27 /* If defined, asynchronous signals delivered to a non-main thread are
  28    forwarded to the main thread.  */
  29 #define FORWARD_SIGNAL_TO_MAIN_THREAD
  30 #endif
  31
  32 #if defined HAVE_TIMER_SETTIME && defined SIGEV_SIGNAL
  33 # define HAVE_ITIMERSPEC
  34 #endif
  35
  36 #if (defined SIGPROF && !defined PROFILING \
  37      && (defined HAVE_SETITIMER || defined HAVE_ITIMERSPEC))
  38 # define PROFILER_CPU_SUPPORT
  39 #endif
  40
  41 extern sigset_t empty_mask;
  42
  43 typedef void (*signal_handler_t) (int);
  44
  45 extern void emacs_sigaction_init (struct sigaction *, signal_handler_t);
  46 char const *safe_strsignal (int) ATTRIBUTE_CONST;
  47
  48 #if NSIG < NSIG_MINIMUM
  49 # undef NSIG
  50 # define NSIG NSIG_MINIMUM
  51 #endif
  52
  53 #ifndef emacs_raise
  54 # define emacs_raise(sig) raise (sig)
  55 #endif
  56
  57 /* On bsd, [man says] kill does not accept a negative number to kill a pgrp.
  58    Must do that using the killpg call.  */
  59 #ifdef BSD_SYSTEM
  60 #define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo)))
  61 #else
  62 #ifdef WINDOWSNT
  63 #define EMACS_KILLPG(gid, signo) (kill (gid, signo))
  64 #else
  65 #define EMACS_KILLPG(gid, signo) (kill   (-(gid), (signo)))
  66 #endif
  67 #endif
  68
  69 /* Define SIGCHLD as an alias for SIGCLD.  There are many conditionals
  70    testing SIGCHLD.  */
  71 #ifdef SIGCLD
  72 #ifndef SIGCHLD
  73 #define SIGCHLD SIGCLD
  74 #endif /* SIGCHLD */
  75 #endif /* ! defined (SIGCLD) */
  76
  77 #ifndef HAVE_STRSIGNAL
  78 # define strsignal(sig) safe_strsignal (sig)
  79 #endif
  80
  81 void deliver_process_signal (int, signal_handler_t);