OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libiberty/] [xatexit.c] - Blame information for rev 791

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 736 jeremybenn
/*
2
 * Copyright (c) 1990 Regents of the University of California.
3
 * All rights reserved.
4
 *
5
 * %sccs.include.redist.c%
6
 */
7
 
8
 
9
/*
10
 
11
@deftypefun int xatexit (void (*@var{fn}) (void))
12
 
13
Behaves as the standard @code{atexit} function, but with no limit on
14
the number of registered functions.  Returns 0 on success, or @minus{}1 on
15
failure.  If you use @code{xatexit} to register functions, you must use
16
@code{xexit} to terminate your program.
17
 
18
@end deftypefun
19
 
20
*/
21
 
22
/* Adapted from newlib/libc/stdlib/{,at}exit.[ch].
23
   If you use xatexit, you must call xexit instead of exit.  */
24
 
25
#ifdef HAVE_CONFIG_H
26
#include "config.h"
27
#endif
28
#include "ansidecl.h"
29
#include "libiberty.h"
30
 
31
#include <stdio.h>
32
 
33
#include <stddef.h>
34
 
35
#if VMS
36
#include <stdlib.h>
37
#include <unixlib.h>
38
#else
39
/* For systems with larger pointers than ints, this must be declared.  */
40
PTR malloc (size_t);
41
#endif
42
 
43
static void xatexit_cleanup (void);
44
 
45
/* Pointer to function run by xexit.  */
46
extern void (*_xexit_cleanup) (void);
47
 
48
#define XATEXIT_SIZE 32
49
 
50
struct xatexit {
51
        struct  xatexit *next;          /* next in list */
52
        int     ind;                    /* next index in this table */
53
        void    (*fns[XATEXIT_SIZE]) (void);    /* the table itself */
54
};
55
 
56
/* Allocate one struct statically to guarantee that we can register
57
   at least a few handlers.  */
58
static struct xatexit xatexit_first;
59
 
60
/* Points to head of LIFO stack.  */
61
static struct xatexit *xatexit_head = &xatexit_first;
62
 
63
/* Register function FN to be run by xexit.
64
   Return 0 if successful, -1 if not.  */
65
 
66
int
67
xatexit (void (*fn) (void))
68
{
69
  register struct xatexit *p;
70
 
71
  /* Tell xexit to call xatexit_cleanup.  */
72
  if (!_xexit_cleanup)
73
    _xexit_cleanup = xatexit_cleanup;
74
 
75
  p = xatexit_head;
76
  if (p->ind >= XATEXIT_SIZE)
77
    {
78
      if ((p = (struct xatexit *) malloc (sizeof *p)) == NULL)
79
        return -1;
80
      p->ind = 0;
81
      p->next = xatexit_head;
82
      xatexit_head = p;
83
    }
84
  p->fns[p->ind++] = fn;
85
  return 0;
86
}
87
 
88
/* Call any cleanup functions.  */
89
 
90
static void
91
xatexit_cleanup (void)
92
{
93
  register struct xatexit *p;
94
  register int n;
95
 
96
  for (p = xatexit_head; p; p = p->next)
97
    for (n = p->ind; --n >= 0;)
98
      (*p->fns[n]) ();
99
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.