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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* ANSI C atexit()
* arrange for func to be called LIFO on exit()
*/
#include <ast.h>
#if _lib_atexit
NoN(atexit)
#else
#if _lib_onexit || _lib_on_exit
#if !_lib_onexit
#define onexit on_exit
#endif
extern int onexit(void(*)(void));
int
atexit(void (*func)(void))
{
return(onexit(func));
}
#else
struct list
{
struct list* next;
void (*func)(void);
};
static struct list* funclist;
extern void _exit(int);
int
atexit(void (*func)(void))
{
register struct list* p;
if (!(p = newof(0, struct list, 1, 0))) return(-1);
p->func = func;
p->next = funclist;
funclist = p;
return(0);
}
void
_ast_atexit(void)
{
register struct list* p;
while (p = funclist)
{
funclist = p->next;
(*p->func)();
}
}
#if _std_cleanup
#if _lib__cleanup
extern void _cleanup(void);
#endif
void
exit(int code)
{
_ast_atexit();
#if _lib__cleanup
_cleanup();
#endif
_exit(code);
}
#else
void
_cleanup(void)
{
_ast_atexit();
}
#endif
#endif
#endif
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