root/src/syssignal.h

INCLUDED FROM

     1 /* syssignal.h - System-dependent definitions for signals.
     2 
     3 Copyright (C) 1993, 1999, 2001-2023 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 (at
    10 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 <https://www.gnu.org/licenses/>.  */
    19 
    20 #ifndef EMACS_SYSSIGNAL_H
    21 #define EMACS_SYSSIGNAL_H
    22 
    23 #include <signal.h>
    24 
    25 #include <attribute.h>
    26 
    27 extern void init_signals (void);
    28 extern void block_child_signal (sigset_t *);
    29 extern void unblock_child_signal (sigset_t const *);
    30 extern void block_interrupt_signal (sigset_t *);
    31 extern void restore_signal_mask (sigset_t const *);
    32 extern void block_tty_out_signal (sigset_t *);
    33 extern void unblock_tty_out_signal (sigset_t const *);
    34 
    35 #ifdef HAVE_PTHREAD
    36 #include <pthread.h>
    37 /* If defined, asynchronous signals delivered to a non-main thread are
    38    forwarded to the main thread.  */
    39 #define FORWARD_SIGNAL_TO_MAIN_THREAD
    40 #endif
    41 
    42 /* On Cygwin as of 2015-06-22 SIGEV_SIGNAL is defined as an enum
    43    constant but not as a macro. */
    44 #if defined CYGWIN && !defined SIGEV_SIGNAL
    45 #define SIGEV_SIGNAL SIGEV_SIGNAL
    46 #endif
    47 
    48 #if defined HAVE_TIMER_SETTIME && defined SIGEV_SIGNAL
    49 # define HAVE_ITIMERSPEC
    50 #endif
    51 
    52 #if (defined SIGPROF && !defined PROFILING \
    53      && (defined HAVE_SETITIMER || defined HAVE_ITIMERSPEC))
    54 # define PROFILER_CPU_SUPPORT
    55 #endif
    56 
    57 extern sigset_t empty_mask;
    58 
    59 typedef void (*signal_handler_t) (int);
    60 
    61 extern void emacs_sigaction_init (struct sigaction *, signal_handler_t);
    62 char const *safe_strsignal (int) ATTRIBUTE_CONST;
    63 
    64 #if NSIG < NSIG_MINIMUM
    65 # undef NSIG
    66 # define NSIG NSIG_MINIMUM
    67 #endif
    68 
    69 #ifndef SA_SIGINFO
    70 # define SA_SIGINFO 0
    71 #endif
    72 
    73 #ifndef emacs_raise
    74 # define emacs_raise(sig) raise (sig)
    75 #endif
    76 
    77 #ifndef HAVE_STRSIGNAL
    78 # define strsignal(sig) safe_strsignal (sig)
    79 #endif
    80 
    81 void deliver_process_signal (int, signal_handler_t);
    82 
    83 #endif /* EMACS_SYSSIGNAL_H */