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/* atexit.c -- Do nothing, but to return a success
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 2, 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, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_ON_EXIT
/* The function used by on_exit has two args:
The routine named is called as
(*procp)(status, arg);
where status is the argument with which exit() was called,
or zero if main returns. Typically, arg is the address of
an argument vector to (*procp), but may be an integer value.
Use this space to store the address to call the atexit'ed function,
so that there are no mismatches between arities of call procedures.
*/
static void
on_exit_wrapper (status, func)
int status;
void (* func) ();
{
func ();
}
int
atexit (func)
void (*func) ();
{
return on_exit (on_exit_wrapper, func);
}
#else /* !defined(HAVE_ON_EXIT) */
/* Define the registering function
* and a replacement exiting function */
#define EXIT_STACK_SIZE 32
typedef void (*exit_fn_t) ();
static exit_fn_t exit_stack[EXIT_STACK_SIZE];
static int exit_stack_len = 0;
int
atexit (func)
exit_fn_t func;
{
if (exit_stack_len >= EXIT_STACK_SIZE)
return 1;
exit_stack [exit_stack_len ++] = func;
return 0;
}
void
exit (status)
int status;
{
while (exit_stack_len > 0)
exit_stack [--exit_stack_len] ();
#undef exit
exit (status);
}
#endif
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