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/*
Copyright (C) 1994 W. Schelter
This file is part of GNU Common Lisp, herein referred to as GCL
GCL is free software; you can redistribute it and/or modify it under
the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GCL 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with GCL; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef __MINGW32__
#include <sys/types.h> /* sigset_t */
#endif
#ifndef IN_UNIXINT
#include "include.h"
#include <signal.h>
#endif
#ifdef USIG
#include USIG
#else
#ifdef HAVE_SIGACTION
#define HAVE_SIGPROCMASK
#endif
#include "usig.h"
extern char signals_handled[];
void
gcl_signal(int signo, void (*handler) (/* ??? */))
{
char *p = signals_handled;
while (*p)
{ if (*p==signo)
{our_signal_handler[signo] = handler;
handler = main_signal_handler;
break;
}
p++;}
{
#ifdef HAVE_SIGACTION
struct sigaction action;
action.sa_handler = handler;
/* action.sa_flags = SA_RESTART | ((signo == SIGSEGV || signo == SIGBUS) ? SV_ONSTACK : 0) */
action.sa_flags = SA_RESTART | ((signo == SIGSEGV || signo == SIGBUS) ? SA_ONSTACK : 0)
#ifdef SA_SIGINFO
| SA_SIGINFO
#endif
;
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask,signo);
sigaction(signo,&action,0);
#else
#ifdef HAVE_SIGVEC
struct sigvec vec;
vec.sv_handler = handler;
vec.sv_flags = (signo == SIGSEGV || signo == SIGBUS ? SV_ONSTACK : 0);
vec.sv_mask = sigmask(signo);
sigvec(signo,&vec,0);
#else
signal(signo,handler);
#endif
#endif
}
}
/* remove the signal n from the signal mask */
int
unblock_signals(int n, int m)
{
int result = 0;
int current_mask;
#ifdef SIG_UNBLOCK_SIGNALS
SIG_UNBLOCK_SIGNALS(result,n,n);
#else
#ifdef HAVE_SIGPROCMASK
/* posix */
{ sigset_t set,oset;
sigemptyset(&set);
sigaddset(&set,n);
sigaddset(&set,m);
sigprocmask(SIG_UNBLOCK,&set,&oset);
current_mask=0;
result =((sigismember(&oset,n) ? signal_mask(n) : current_mask)
|(sigismember(&oset,m) ? signal_mask(m) : current_mask));
}
#else
current_mask = sigblock(0);
sigsetmask(~(sigmask(m)) & ~(sigmask(n)) & current_mask);
result = (current_mask & sigmask(m) ? signal_mask(m) : 0)
| (current_mask & sigmask(n) ? signal_mask(n) : 0);
#endif
#endif
return result;
}
void
unblock_sigusr_sigio(void)
{
#ifdef HAVE_SIGPROCMASK
/* posix */
{ sigset_t set;
sigemptyset(&set);
sigaddset(&set,SIGUSR1);
sigaddset(&set,SIGIO);
sigprocmask( SIG_UNBLOCK,&set,0);
}
#else
int current_mask = sigblock(0);
return sigsetmask(~(sigmask(SIGIO))&~(sigmask(SIGUSR1)) & current_mask);
#endif
}
static void
sigfpe1(void)
{
gcl_signal(SIGFPE, sigfpe1);
FEerror("Floating-point exception.", 0);
}
static void
sigpipe(void)
{
gcl_signal(SIGPIPE, sigpipe);
perror("");
FEerror("Broken pipe", 0);
}
void
sigint(void)
{
unblock_signals(SIGINT,SIGINT);
terminal_interrupt(1);
}
static void
sigalrm(void)
{
unblock_signals(SIGALRM,SIGALRM);
raise_pending_signals(sig_try_to_delay);
}
DEFVAR("*INTERRUPT-ENABLE*",sSAinterrupt_enableA,SI,sLt,"");
DEF_ORDINARY("SIGUSR1-INTERRUPT",sSsigusr1_interrupt,SI,"");
DEF_ORDINARY("SIGIO-INTERRUPT",sSsigio_interrupt,SI,"");
static void
sigusr1(void)
{ifuncall1(sSsigusr1_interrupt,Cnil);}
static void
sigio(void)
{ifuncall1(sSsigio_interrupt,Cnil);}
void
install_default_signals(void)
{ gcl_signal(SIGFPE, sigfpe1);
gcl_signal(SIGPIPE, sigpipe);
gcl_signal(SIGINT, sigint);
gcl_signal(SIGUSR1, sigusr1);
gcl_signal(SIGIO, sigio);
gcl_signal(SIGALRM, sigalrm);
/*install_segmentation_catcher(); */
signals_allowed = sig_normal;
}
#endif
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