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Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/register-atfork.c')
-rw-r--r--nptl/sysdeps/unix/sysv/linux/register-atfork.c145
1 files changed, 0 insertions, 145 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/register-atfork.c b/nptl/sysdeps/unix/sysv/linux/register-atfork.c
deleted file mode 100644
index 2cc49540b9..0000000000
--- a/nptl/sysdeps/unix/sysv/linux/register-atfork.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/* Copyright (C) 2002-2014 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
-
- 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, see
- <http://www.gnu.org/licenses/>. */
-
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fork.h>
-#include <atomic.h>
-
-
-/* Lock to protect allocation and deallocation of fork handlers. */
-int __fork_lock = LLL_LOCK_INITIALIZER;
-
-
-/* Number of pre-allocated handler entries. */
-#define NHANDLER 48
-
-/* Memory pool for fork handler structures. */
-static struct fork_handler_pool
-{
- struct fork_handler_pool *next;
- struct fork_handler mem[NHANDLER];
-} fork_handler_pool;
-
-
-static struct fork_handler *
-fork_handler_alloc (void)
-{
- struct fork_handler_pool *runp = &fork_handler_pool;
- struct fork_handler *result = NULL;
- unsigned int i;
-
- do
- {
- /* Search for an empty entry. */
- for (i = 0; i < NHANDLER; ++i)
- if (runp->mem[i].refcntr == 0)
- goto found;
- }
- while ((runp = runp->next) != NULL);
-
- /* We have to allocate a new entry. */
- runp = (struct fork_handler_pool *) calloc (1, sizeof (*runp));
- if (runp != NULL)
- {
- /* Enqueue the new memory pool into the list. */
- runp->next = fork_handler_pool.next;
- fork_handler_pool.next = runp;
-
- /* We use the last entry on the page. This means when we start
- searching from the front the next time we will find the first
- entry unused. */
- i = NHANDLER - 1;
-
- found:
- result = &runp->mem[i];
- result->refcntr = 1;
- result->need_signal = 0;
- }
-
- return result;
-}
-
-
-int
-__register_atfork (prepare, parent, child, dso_handle)
- void (*prepare) (void);
- void (*parent) (void);
- void (*child) (void);
- void *dso_handle;
-{
- /* Get the lock to not conflict with other allocations. */
- lll_lock (__fork_lock, LLL_PRIVATE);
-
- struct fork_handler *newp = fork_handler_alloc ();
-
- if (newp != NULL)
- {
- /* Initialize the new record. */
- newp->prepare_handler = prepare;
- newp->parent_handler = parent;
- newp->child_handler = child;
- newp->dso_handle = dso_handle;
-
- __linkin_atfork (newp);
- }
-
- /* Release the lock. */
- lll_unlock (__fork_lock, LLL_PRIVATE);
-
- return newp == NULL ? ENOMEM : 0;
-}
-libc_hidden_def (__register_atfork)
-
-
-void
-attribute_hidden
-__linkin_atfork (struct fork_handler *newp)
-{
- do
- newp->next = __fork_handlers;
- while (catomic_compare_and_exchange_bool_acq (&__fork_handlers,
- newp, newp->next) != 0);
-}
-
-
-libc_freeres_fn (free_mem)
-{
- /* Get the lock to not conflict with running forks. */
- lll_lock (__fork_lock, LLL_PRIVATE);
-
- /* No more fork handlers. */
- __fork_handlers = NULL;
-
- /* Free eventually allocated memory blocks for the object pool. */
- struct fork_handler_pool *runp = fork_handler_pool.next;
-
- memset (&fork_handler_pool, '\0', sizeof (fork_handler_pool));
-
- /* Release the lock. */
- lll_unlock (__fork_lock, LLL_PRIVATE);
-
- /* We can free the memory after releasing the lock. */
- while (runp != NULL)
- {
- struct fork_handler_pool *oldp = runp;
- runp = runp->next;
- free (oldp);
- }
-}