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118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/* syssignal.h - System-dependent definitions for signals.
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Copyright (C) 1992 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifdef POSIX_SIGNALS
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#define SIGMASKTYPE sigset_t
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#define SIGEMPTYMASK (empty_mask)
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#define SIGFULLMASK (full_mask)
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extern sigset_t empty_mask, full_mask, temp_mask;
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/* POSIX pretty much destroys any possibility of writing sigmask as a
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macro in standard C. */
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#ifdef __GNUC__
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#define sigmask(SIG) \
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({ \
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sigset_t _mask; \
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sigemptyset (&_mask); \
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sigaddset (&_mask, SIG); \
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_mask; \
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})
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#else
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#define sigmask(SIG) (sys_sigmask (SIG))
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#endif
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#define sigpause(SIG) sys_sigpause(SIG)
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#define sigblock(SIG) sys_sigblock(SIG)
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#define sigunblock(SIG) sys_sigunblock(SIG)
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#define sigsetmask(SIG) sys_sigsetmask(SIG)
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#define sighold(SIG) ONLY_USED_IN_BSD_4_1
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#define sigrelse(SIG) ONLY_USED_IN_BSD_4_1
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int (*sys_signal (int signal_number, int (*action)())) ();
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int sys_sigpause (int signal_number);
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sigset_t sys_sigblock (sigset_t new_mask);
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sigset_t sys_sigunblock (sigset_t new_mask);
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sigset_t sys_sigsetmask (sigset_t new_mask);
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#define sys_sigdel(MASK,SIG) sigdelset(&MASK,SIG)
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#else /* not POSIX_SIGNALS */
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#define sigunblock(SIG) \
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{ SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); }
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#endif /* not POSIX_SIGNALS */
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#ifndef SIGMASKTYPE
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#define SIGMASKTYPE int
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#endif
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#ifndef SIGEMPTYMASK
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#define SIGEMPTYMASK (0)
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#endif
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#ifndef SIGFULLMASK
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#define SIGFULLMASK (0xffffffff)
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#endif
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#ifndef sigmask
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#define sigmask(no) (1L << ((no) - 1))
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#endif
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#ifndef sigunblock
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#define sigunblock(SIG) \
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{ SIGMASKTYPE omask = sigblock (SIGFULLMASK); sigsetmask (omask & ~SIG); }
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#endif
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/* It would be very nice if we could somehow clean up all this trash. */
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#ifndef BSD4_1
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#define sigfree() sigsetmask (SIGEMPTYMASK)
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#define sigholdx(sig) sigsetmask (sigmask (sig))
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#define sigblockx(sig) sigblock (sigmask (sig))
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#define sigunblockx(sig) sigblock (SIGEMPTYMASK)
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#define sigpausex(sig) sigpause (0)
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#endif /* not BSD4_1 */
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#ifdef BSD4_1
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#define SIGIO SIGTINT
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/* sigfree and sigholdx are in sysdep.c */
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#define sigblockx(sig) sighold (sig)
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#define sigunblockx(sig) sigrelse (sig)
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#define sigpausex(sig) sigpause (sig)
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#endif /* BSD4_1 */
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/* On bsd, [man says] kill does not accept a negative number to kill a pgrp.
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Must do that using the killpg call. */
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#ifdef BSD
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#define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo)))
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#else
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#define EMACS_KILLPG(gid, signo) (kill (-(gid), (signo)))
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#endif
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/* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
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testing SIGCHLD. */
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#ifndef VMS
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#ifdef SIGCLD
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#ifndef SIGCHLD
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#define SIGCHLD SIGCLD
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#endif /* not SIGCHLD */
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#endif /* SIGCLD */
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#endif /* not VMS */
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