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Diffstat (limited to 'stdlib/cxa_atexit.c')
-rw-r--r--stdlib/cxa_atexit.c73
1 files changed, 23 insertions, 50 deletions
diff --git a/stdlib/cxa_atexit.c b/stdlib/cxa_atexit.c
index 3bdf871e53..a3d4c5037d 100644
--- a/stdlib/cxa_atexit.c
+++ b/stdlib/cxa_atexit.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999, 2001, 2002, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 1999, 2001, 2002 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
@@ -16,13 +16,9 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#include <assert.h>
-#include <stdlib.h>
-
#include <bits/libc-lock.h>
+#include <stdlib.h>
#include "exit.h"
-#include <atomic.h>
-#include <sysdep.h>
#undef __cxa_atexit
@@ -37,14 +33,10 @@ __cxa_atexit (void (*func) (void *), void *arg, void *d)
if (new == NULL)
return -1;
-#ifdef PTR_MANGLE
- PTR_MANGLE (func);
-#endif
+ new->flavor = ef_cxa;
new->func.cxa.fn = (void (*) (void *, int)) func;
new->func.cxa.arg = arg;
new->func.cxa.dso_handle = d;
- atomic_write_barrier ();
- new->flavor = ef_cxa;
return 0;
}
INTDEF(__cxa_atexit)
@@ -56,68 +48,49 @@ __libc_lock_define_initialized (static, lock)
static struct exit_function_list initial;
struct exit_function_list *__exit_funcs = &initial;
-uint64_t __new_exitfn_called;
struct exit_function *
__new_exitfn (void)
{
- struct exit_function_list *p = NULL;
struct exit_function_list *l;
- struct exit_function *r = NULL;
size_t i = 0;
__libc_lock_lock (lock);
- for (l = __exit_funcs; l != NULL; p = l, l = l->next)
+ for (l = __exit_funcs; l != NULL; l = l->next)
{
- for (i = l->idx; i > 0; --i)
- if (l->fns[i - 1].flavor != ef_free)
+ for (i = 0; i < l->idx; ++i)
+ if (l->fns[i].flavor == ef_free)
break;
-
- if (i > 0)
+ if (i < l->idx)
break;
- /* This block is completely unused. */
- l->idx = 0;
+ if (l->idx < sizeof (l->fns) / sizeof (l->fns[0]))
+ {
+ i = l->idx++;
+ break;
+ }
}
- if (l == NULL || i == sizeof (l->fns) / sizeof (l->fns[0]))
+ if (l == NULL)
{
- /* The last entry in a block is used. Use the first entry in
- the previous block if it exists. Otherwise create a new one. */
- if (p == NULL)
+ l = (struct exit_function_list *)
+ malloc (sizeof (struct exit_function_list));
+ if (l != NULL)
{
- assert (l != NULL);
- p = (struct exit_function_list *)
- calloc (1, sizeof (struct exit_function_list));
- if (p != NULL)
- {
- p->next = __exit_funcs;
- __exit_funcs = p;
- }
- }
+ l->next = __exit_funcs;
+ __exit_funcs = l;
- if (p != NULL)
- {
- r = &p->fns[0];
- p->idx = 1;
+ l->idx = 1;
+ i = 0;
}
}
- else
- {
- /* There is more room in the block. */
- r = &l->fns[i];
- l->idx = i + 1;
- }
/* Mark entry as used, but we don't know the flavor now. */
- if (r != NULL)
- {
- r->flavor = ef_us;
- ++__new_exitfn_called;
- }
+ if (l != NULL)
+ l->fns[i].flavor = ef_us;
__libc_lock_unlock (lock);
- return r;
+ return l == NULL ? NULL : &l->fns[i];
}