Files
fit/unix/sys_try.c
2022-08-19 15:22:33 +02:00

57 lines
1.1 KiB
C

#include <assert.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <setjmp.h>
#include <signal.h>
#include <limits.h>
#include "myc_fortran.h"
void intcatch(int sig)
{ printf("\nuse quit (normally ctrl-\\) to interrupt\n");
}
int called=0; /* env is valid only if called==1 */
jmp_buf env;
void (*inthdl)(int sig)=intcatch;
void (*errhdl)(void);
void sighdl(int sig)
{ if (called) longjmp(env,sig);
}
void F_FUN(sys_err_hdl)(void errhdl0(void))
{ errhdl=errhdl0; }
void F_FUN(sys_int_hdl)(void inthdl0(int sig))
{ inthdl=inthdl0; }
void F_FUN(sys_try)(void proc(void))
{ int status;
void (*sgh[32]) (int);
assert(!called); /* nested calls not allowed */
called=1;
sgh[SIGFPE] =signal(SIGFPE, sighdl);
sgh[SIGINT] =signal(SIGINT, *inthdl);
status=setjmp(env);
if (status==0) /* first return of setjmp */
{ proc(); }
else
{ (*errhdl)(); };
signal(SIGFPE, sgh[SIGFPE]);
signal(SIGINT, intcatch);
called=0;
}
void F_FUN(sys_abort)(void)
{ if (called) longjmp(env,-2);
}
void F_FUN(sys_exit_hdl)(void hdl(void))
{ atexit(hdl);
}