Initial revision

src/syssignal.h

@@ -0,0 +1,101 @@
+/* syssignal.h - System-dependent definitions for signals.
+   Copyright (C) 1992 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#ifdef POSIX_SIGNALS
+#define SIGMASKTYPE sigset_t
+
+#define SIGEMPTYMASK (empty_mask)
+#define SIGFULLMASK (full_mask)
+extern sigset_t empty_mask, full_mask, temp_mask;
+
+#define sigmask(SIG) \
+(sigemptyset (&temp_mask), sigaddset (&temp_mask, SIG), temp_mask)
+
+/* May need a local mask.  There could be problems if code using any
+   of the 3 macros below could be reentered due to a signal occurring.
+   This can't happen in Emacs 18.57, so we don't worry. - DJB
+   These macros also require GCC. */
+#define sigpause(SIG)    ({ sigset_t _mask; sys_sigpause(SIG); })
+#define sigblock(SIG)    ({ sigset_t _mask; sys_sigblock(SIG); })
+#define sigunblock(SIG)  ({ sigset_t _mask; sys_sigunblock(SIG); })
+#define sigsetmask(SIG)  ({ sigset_t _mask; sys_sigsetmask(SIG); })
+#define sighold(SIG)     ONLY_USED_IN_BSD_4_1
+#define sigrelse(SIG)    ONLY_USED_IN_BSD_4_1
+
+int (*sys_signal (int signal_number, int (*action)())) ();
+int sys_sigpause (int signal_number);
+sigset_t sys_sigblock (sigset_t new_mask);
+sigset_t sys_sigunblock (sigset_t new_mask);
+sigset_t sys_sigsetmask (sigset_t new_mask);
+
+#define sys_sigdel(MASK,SIG) sigdelset(&MASK,SIG)
+
+#else /* not POSIX_SIGNALS */
+
+#define sigunblock(SIG) \
+{ SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); }
+
+#endif /* not POSIX_SIGNALS */
+
+#ifndef SIGMASKTYPE
+#define SIGMASKTYPE int
+#endif
+
+#ifndef SIGEMPTYMASK
+#define SIGEMPTYMASK 0
+#endif
+
+#ifndef sigmask
+#define sigmask(no) (1L << ((no) - 1))
+#endif
+
+#ifndef BSD4_1
+#define sigfree() sigsetmask (SIGEMPTYMASK)
+#define sigholdx(sig) sigsetmask (sigmask (sig))
+#define sigblockx(sig) sigblock (sigmask (sig))
+#define sigunblockx(sig) sigblock (SIGEMPTYMASK)
+#define sigpausex(sig) sigpause (0)
+#endif /* not BSD4_1 */
+
+#ifdef BSD4_1
+#define SIGIO SIGTINT
+/* sigfree and sigholdx are in sysdep.c */
+#define sigblockx(sig) sighold (sig)
+#define sigunblockx(sig) sigrelse (sig)
+#define sigpausex(sig) sigpause (sig)
+#endif /* BSD4_1 */
+
+/* On bsd, [man says] kill does not accept a negative number to kill a pgrp.
+   Must do that using the killpg call.  */
+#ifdef BSD
+#define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo)))
+#else
+#define EMACS_KILLPG(gid, signo) (kill   (-(gid), (signo)))
+#endif
+
+/* Define SIGCHLD as an alias for SIGCLD.  There are many conditionals
+   testing SIGCHLD.  */
+
+#ifndef VMS
+#ifdef SIGCLD
+#ifndef SIGCHLD
+#define SIGCHLD SIGCLD
+#endif /* not SIGCHLD */
+#endif /* SIGCLD */
+#endif /* not VMS */