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Diffstat (limited to 'info/signals.h')
| -rw-r--r-- | info/signals.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/info/signals.h b/info/signals.h new file mode 100644 index 0000000..08992ad --- /dev/null +++ b/info/signals.h @@ -0,0 +1,96 @@ +/* signals.h -- header to include system dependent signal definitions. + $Id: signals.h,v 1.5 2007/07/01 21:20:31 karl Exp $ + + Copyright (C) 1993, 1994, 1995, 1997, 2002, 2004, 2007 + 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. + + Originally 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 */ + +/* Without SA_NOCLDSTOP, sigset_t might end up being undefined even + though we have sigprocmask, on older systems, according to Nelson + Beebe. The test is from coreutils/sort.c, via Paul Eggert. */ +#if !defined (HAVE_SIGPROCMASK) || !defined (SA_NOCLDSTOP) +# 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 */ |