summary refs log tree commit diff
path: root/stdlib/exit.c
blob: bc4cb0fd08530f2d6606f02afb93395df15b478a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
/* Copyright (C) 1991,95,96,97,99,2001,2002,2005 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sysdep.h>
#include "exit.h"

#include "set-hooks.h"
DEFINE_HOOK (__libc_atexit, (void))


/* Call all functions registered with `atexit' and `on_exit',
   in the reverse of the order in which they were registered
   perform stdio cleanup, and terminate program execution with STATUS.  */
void
exit (int status)
{
  /* We do it this way to handle recursive calls to exit () made by
     the functions registered with `atexit' and `on_exit'. We call
     everyone on the list and use the status value in the last
     exit (). */
  while (__exit_funcs != NULL)
    {
      struct exit_function_list *old;

      while (__exit_funcs->idx > 0)
	{
	  const struct exit_function *const f =
	    &__exit_funcs->fns[--__exit_funcs->idx];
	  switch (f->flavor)
	    {
	      void (*atfct) (void);
	      void (*onfct) (int status, void *arg);
	      void (*cxafct) (void *arg, int status);

	    case ef_free:
	    case ef_us:
	      break;
	    case ef_on:
	      onfct = f->func.on.fn;
#ifdef PTR_DEMANGLE
	      PTR_DEMANGLE (onfct);
#endif
	      onfct (status, f->func.on.arg);
	      break;
	    case ef_at:
	      atfct = f->func.at;
#ifdef PTR_DEMANGLE
	      PTR_DEMANGLE (atfct);
#endif
	      atfct ();
	      break;
	    case ef_cxa:
	      cxafct = f->func.cxa.fn;
#ifdef PTR_DEMANGLE
	      PTR_DEMANGLE (cxafct);
#endif
	      cxafct (f->func.cxa.arg, status);
	      break;
	    }
	}

      old = __exit_funcs;
      __exit_funcs = __exit_funcs->next;
      if (__exit_funcs != NULL)
	/* Don't free the last element in the chain, this is the statically
	   allocate element.  */
	free (old);
    }

  RUN_HOOK (__libc_atexit, ());

  _exit (status);
}
libc_hidden_def (exit)