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/* Test of setjmp()/longjmp() functions: return value.
$Id: setjmp-1.c,v 1.1.2.2 2008/03/24 11:29:54 dmix Exp $ */
#include <stdlib.h>
#include <setjmp.h>
jmp_buf env;
int main ()
{
int (* volatile v_setjmp) (jmp_buf);
void (* volatile v_longjmp) (jmp_buf, int);
/* Return 0 from setjmp(). */
if (setjmp (env))
exit (__LINE__);
/* Pass value throw longjmp(). */
switch (setjmp (env)) {
case 0:
longjmp (env, 12345);
exit (__LINE__);
case 12345:
break;
default:
exit (__LINE__);
}
/* Replace 0 arg of longjmp(). */
switch (setjmp (env)) {
case 0:
longjmp (env, 0);
exit (__LINE__);
case 1:
break;
default:
exit (__LINE__);
}
/* Check -1 value. */
switch (setjmp (env)) {
case 0:
longjmp (env, -1);
exit (__LINE__);
case -1:
break;
default:
exit (__LINE__);
}
/* Repeat above with volatile function pointers: exclude
posible compiler optimization. */
v_setjmp = setjmp;
v_longjmp = longjmp;
if (v_setjmp (env))
exit (__LINE__);
switch (v_setjmp (env)) {
case 0:
v_longjmp (env, 12345);
exit (__LINE__);
case 12345:
break;
default:
exit (__LINE__);
}
switch (v_setjmp (env)) {
case 0:
v_longjmp (env, 0);
exit (__LINE__);
case 1:
break;
default:
exit (__LINE__);
}
switch (v_setjmp (env)) {
case 0:
v_longjmp (env, -1);
exit (__LINE__);
case -1:
break;
default:
exit (__LINE__);
}
return 0;
}
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