mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 20:00:19 +02:00
1cc91f1b29
arbiters.c, arbiters.h, async.c, async.h, boolean.c, boolean.h, chars.c, chars.h, continuations.c, continuations.h, debug.c, debug.h, dynwind.c, dynwind.h, eq.c, eq.h, error.c, eval.c, eval.h, extchrs.c, extchrs.h, fdsocket.c, fdsocket.h, filesys.c, filesys.h, fports.c, fports.h, gc.c, gdb_interface.h, gdbint.c, gdbint.h, genio.c, genio.h, gscm.c, gscm.h, gsubr.c, gsubr.h, hash.c, hash.h, hashtab.c, hashtab.h, init.c, ioext.c, ioext.h, kw.c, kw.h, libguile.h, mallocs.c, mallocs.h, markers.c, markers.h, mbstrings.c, mbstrings.h, numbers.c, numbers.h, objprop.c, objprop.h, options.c, options.h, pairs.c, pairs.h, ports.c, ports.h, posix.c, posix.h, print.c, print.h, procprop.c, procprop.h, procs.c, procs.h, ramap.c, ramap.h, read.c, read.h, root.c, scmsigs.c, scmsigs.h, sequences.c, sequences.h, simpos.c, simpos.h, smob.c, socket.c, socket.h, srcprop.c, srcprop.h, stackchk.c, stackchk.h, stime.c, stime.h, strings.c, strings.h, strop.c, strop.h, strorder.c, strorder.h, strports.c, strports.h, struct.c, struct.h, symbols.c, symbols.h, tag.c, tag.h, unif.c, unif.h, variable.c, variable.h, vectors.c, vectors.h, version.c, version.h, vports.c, vports.h, weaks.c, weaks.h: Use SCM_P to declare functions with prototypes. (Patch thanks to Marius Vollmer.)
368 lines
7.8 KiB
C
368 lines
7.8 KiB
C
/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
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*
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* This program 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 2, or (at your option)
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* any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this software; 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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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*/
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#include <stdio.h>
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#include <signal.h>
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#include "_scm.h"
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#include "scmsigs.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if (__TURBOC__==1)
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#define signal ssignal /* Needed for TURBOC V1.0 */
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#endif
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#ifdef USE_MIT_PTHREADS
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#undef signal
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#define signal pthread_signal
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#endif
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/* SIGRETTYPE is the type that signal handlers return. See <signal.h>*/
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#ifdef RETSIGTYPE
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#define SIGRETTYPE RETSIGTYPE
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#else
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#ifdef STDC_HEADERS
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#if (__TURBOC__==1)
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#define SIGRETTYPE int
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#else
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#define SIGRETTYPE void
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#endif
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#else
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#ifdef linux
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#define SIGRETTYPE void
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#else
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#define SIGRETTYPE int
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#endif
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#endif
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#endif
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#ifdef vms
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#ifdef __GNUC__
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#define SIGRETTYPE int
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#endif
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#endif
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#define SIGFN(NAME, SCM_NAME, SIGNAL) \
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static SIGRETTYPE \
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NAME (sig) \
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int sig; \
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{ \
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signal (SIGNAL, NAME); \
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scm_take_signal (SCM_NAME); \
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}
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#ifdef SIGHUP
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SIGFN(scm_hup_signal, SCM_HUP_SIGNAL, SIGHUP)
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#endif
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#ifdef SIGINT
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SIGFN(scm_int_signal, SCM_INT_SIGNAL, SIGINT)
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#endif
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#ifdef SIGFPE
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SIGFN(scm_fpe_signal, SCM_FPE_SIGNAL, SIGFPE)
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#endif
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#ifdef SIGBUS
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SIGFN(scm_bus_signal, SCM_BUS_SIGNAL, SIGBUS)
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#endif
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#ifdef SIGSEGV
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SIGFN(scm_segv_signal, SCM_SEGV_SIGNAL, SIGSEGV)
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#endif
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#ifdef SIGALRM
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SIGFN(scm_alrm_signal, SCM_ALRM_SIGNAL, SIGALRM)
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#endif
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#define FAKESIGFN(NAME, SCM_NAME) \
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static SIGRETTYPE \
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NAME (sig) \
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int sig; \
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{ \
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scm_take_signal (SCM_NAME); \
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}
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#if 0
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/* !!! */
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FAKESIGFN(scm_gc_signal, SCM_GC_SIGNAL)
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FAKESIGFN(scm_tick_signal, SCM_TICK_SIGNAL)
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#endif
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SCM_PROC(s_alarm, "alarm", 1, 0, 0, scm_alarm);
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SCM
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scm_alarm (i)
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SCM i;
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{
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unsigned int j;
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SCM_ASSERT (SCM_INUMP (i) && (SCM_INUM (i) >= 0), i, SCM_ARG1, s_alarm);
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SCM_SYSCALL (j = alarm (SCM_INUM (i)));
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return SCM_MAKINUM (j);
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}
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SCM_PROC(s_pause, "pause", 0, 0, 0, scm_pause);
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SCM
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scm_pause ()
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{
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pause ();
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return SCM_UNSPECIFIED;
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}
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SCM_PROC(s_sleep, "sleep", 1, 0, 0, scm_sleep);
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SCM
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scm_sleep (i)
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SCM i;
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{
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unsigned int j;
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SCM_ASSERT (SCM_INUMP (i) && (SCM_INUM (i) >= 0), i, SCM_ARG1, s_sleep);
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#ifdef __HIGHC__
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SCM_SYSCALL(j = 0; sleep(SCM_INUM(i)););
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#else
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SCM_SYSCALL(j = sleep(SCM_INUM(i)););
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#endif
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return SCM_MAKINUM (j);
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}
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SCM_PROC(s_raise, "raise", 1, 0, 0, scm_raise);
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SCM
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scm_raise(sig)
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SCM sig;
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{
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SCM_ASSERT(SCM_INUMP(sig), sig, SCM_ARG1, s_raise);
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# ifdef vms
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return SCM_MAKINUM(gsignal((int)SCM_INUM(sig)));
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# else
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return kill (getpid(), (int)SCM_INUM(sig)) ? SCM_BOOL_F : SCM_BOOL_T;
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# endif
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}
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#ifdef SIGHUP
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static SIGRETTYPE (*oldhup) ();
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#endif
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#ifdef SIGINT
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static SIGRETTYPE (*oldint) ();
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#endif
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#ifdef SIGFPE
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static SIGRETTYPE (*oldfpe) ();
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#endif
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#ifdef SIGBUS
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static SIGRETTYPE (*oldbus) ();
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#endif
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#ifdef SIGSEGV /* AMIGA lacks! */
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static SIGRETTYPE (*oldsegv) ();
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#endif
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#ifdef SIGALRM
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static SIGRETTYPE (*oldalrm) ();
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#endif
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#ifdef SIGPIPE
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static SIGRETTYPE (*oldpipe) ();
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#endif
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void
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scm_init_signals ()
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{
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#ifdef SIGINT
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oldint = signal (SIGINT, scm_int_signal);
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#endif
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#ifdef SIGHUP
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oldhup = signal (SIGHUP, scm_hup_signal);
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#endif
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#ifdef SIGFPE
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oldfpe = signal (SIGFPE, scm_fpe_signal);
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#endif
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#ifdef SIGBUS
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oldbus = signal (SIGBUS, scm_bus_signal);
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#endif
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#ifdef SIGSEGV /* AMIGA lacks! */
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oldsegv = signal (SIGSEGV, scm_segv_signal);
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#endif
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#ifdef SIGALRM
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alarm (0); /* kill any pending ALRM interrupts */
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oldalrm = signal (SIGALRM, scm_alrm_signal);
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#endif
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#ifdef SIGPIPE
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oldpipe = signal (SIGPIPE, SIG_IGN);
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#endif
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#ifdef ultrix
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siginterrupt (SIGINT, 1);
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siginterrupt (SIGALRM, 1);
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siginterrupt (SIGHUP, 1);
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siginterrupt (SIGPIPE, 1);
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#endif /* ultrix */
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}
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/* This is used in preparation for a possible fork(). Ignore all
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signals before the fork so that child will catch only if it
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establishes a handler */
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void
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scm_ignore_signals ()
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{
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#ifdef ultrix
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siginterrupt (SIGINT, 0);
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siginterrupt (SIGALRM, 0);
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siginterrupt (SIGHUP, 0);
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siginterrupt (SIGPIPE, 0);
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#endif /* ultrix */
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signal (SIGINT, SIG_IGN);
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#ifdef SIGHUP
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signal (SIGHUP, SIG_DFL);
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#endif
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#ifdef SCM_FLOATS
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signal (SIGFPE, SIG_DFL);
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#endif
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#ifdef SIGBUS
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signal (SIGBUS, SIG_DFL);
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#endif
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#ifdef SIGSEGV /* AMIGA lacks! */
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signal (SIGSEGV, SIG_DFL);
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#endif
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/* Some documentation claims that ALRMs are cleared accross forks.
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If this is not always true then the value returned by alarm(0)
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will have to be saved and scm_unignore_signals() will have to
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reinstate it. */
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/* This code should be neccessary only if the forked process calls
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alarm() without establishing a handler:
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#ifdef SIGALRM
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oldalrm = signal(SIGALRM, SIG_DFL);
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#endif */
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/* These flushes are per warning in man page on fork(). */
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fflush (stdout);
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fflush (stderr);
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}
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void
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scm_unignore_signals ()
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{
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signal (SIGINT, scm_int_signal);
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#ifdef SIGHUP
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signal (SIGHUP, scm_hup_signal);
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#endif
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#ifdef SCM_FLOATS
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signal (SIGFPE, scm_fpe_signal);
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#endif
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#ifdef SIGBUS
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signal (SIGBUS, scm_bus_signal);
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#endif
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#ifdef SIGSEGV /* AMIGA lacks! */
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signal (SIGSEGV, scm_segv_signal);
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#endif
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#ifdef SIGALRM
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signal (SIGALRM, scm_alrm_signal);
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#endif
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#ifdef ultrix
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siginterrupt (SIGINT, 1);
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siginterrupt (SIGALRM, 1);
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siginterrupt (SIGHUP, 1);
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siginterrupt (SIGPIPE, 1);
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#endif /* ultrix */
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}
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SCM_PROC (s_restore_signals, "restore-signals", 0, 0, 0, scm_restore_signals);
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SCM
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scm_restore_signals ()
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{
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#ifdef ultrix
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siginterrupt (SIGINT, 0);
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siginterrupt (SIGALRM, 0);
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siginterrupt (SIGHUP, 0);
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siginterrupt (SIGPIPE, 0);
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#endif /* ultrix */
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signal (SIGINT, oldint);
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#ifdef SIGHUP
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signal (SIGHUP, oldhup);
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#endif
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#ifdef SCM_FLOATS
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signal (SIGFPE, oldfpe);
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#endif
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#ifdef SIGBUS
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signal (SIGBUS, oldbus);
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#endif
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#ifdef SIGSEGV /* AMIGA lacks! */
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signal (SIGSEGV, oldsegv);
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#endif
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#ifdef SIGPIPE
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signal (SIGPIPE, oldpipe);
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#endif
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#ifdef SIGALRM
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alarm (0); /* kill any pending ALRM interrupts */
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signal (SIGALRM, oldalrm);
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#endif
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return SCM_UNSPECIFIED;
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}
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void
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scm_init_scmsigs ()
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{
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#include "scmsigs.x"
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}
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