/* signals.h -- Header to include system dependent signal definitions. $Id: signals.h,v 1.1.1.2 1998/03/22 20:42:55 law Exp $ This file is part of GNU Info, a program for reading online documentation stored in Info format. Copyright (C) 1993, 94, 95, 97 Free Software Foundation, Inc. This program 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 2, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Written by Brian Fox (bfox@ai.mit.edu). */ #ifndef INFO_SIGNALS_H #define INFO_SIGNALS_H #include <sys/types.h> #include <signal.h> /* For sysV68 --phdm@info.ucl.ac.be. */ #if !defined (SIGCHLD) && defined (SIGCLD) #define SIGCHLD SIGCLD #endif #if !defined (HAVE_SIGPROCMASK) && !defined (sigmask) # define sigmask(x) (1 << ((x)-1)) #endif /* !HAVE_SIGPROCMASK && !sigmask */ #if !defined (HAVE_SIGPROCMASK) # if !defined (SIG_BLOCK) # define SIG_UNBLOCK 1 # define SIG_BLOCK 2 # define SIG_SETMASK 3 # endif /* SIG_BLOCK */ /* Type of a signal set. */ # define sigset_t int /* Make SET have no signals in it. */ # define sigemptyset(set) (*(set) = (sigset_t)0x0) /* Make SET have the full range of signal specifications possible. */ # define sigfillset(set) (*(set) = (sigset_t)0xffffffffff) /* Add SIG to the contents of SET. */ # define sigaddset(set, sig) *(set) |= sigmask (sig) /* Delete SIG from the contents of SET. */ # define sigdelset(set, sig) *(set) &= ~(sigmask (sig)) /* Tell if SET contains SIG. */ # define sigismember(set, sig) (*(set) & (sigmask (sig))) /* Suspend the process until the reception of one of the signals not present in SET. */ # define sigsuspend(set) sigpause (*(set)) #endif /* !HAVE_SIGPROCMASK */ #if defined (HAVE_SIGPROCMASK) || defined (HAVE_SIGSETMASK) /* These definitions are used both in POSIX and non-POSIX implementations. */ #define BLOCK_SIGNAL(sig) \ do { \ sigset_t nvar, ovar; \ sigemptyset (&nvar); \ sigemptyset (&ovar); \ sigaddset (&nvar, sig); \ sigprocmask (SIG_BLOCK, &nvar, &ovar); \ } while (0) #define UNBLOCK_SIGNAL(sig) \ do { \ sigset_t nvar, ovar; \ sigemptyset (&ovar); \ sigemptyset (&nvar); \ sigaddset (&nvar, sig); \ sigprocmask (SIG_UNBLOCK, &nvar, &ovar); \ } while (0) #else /* !HAVE_SIGPROCMASK && !HAVE_SIGSETMASK */ # define BLOCK_SIGNAL(sig) # define UNBLOCK_SIGNAL(sig) #endif /* !HAVE_SIGPROCMASK && !HAVE_SIGSETMASK */ #endif /* not INFO_SIGNALS_H */