Copy from trunk.

1 files changed, 87 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/sysdeps/unix/sysv/linux/register-atfork.c b/libpthread/linuxthreads/sysdeps/unix/sysv/linux/register-atfork.c
new file mode 100644
index 000000000..2dce262a3
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/unix/sysv/linux/register-atfork.c
@@ -0,0 +1,87 @@
+/* Copyright (C) 2002 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <stdlib.h>
+#include "fork.h"
+
+
+int
+__register_atfork (prepare, parent, child, dso_handle)
+     void (*prepare) (void);
+     void (*parent) (void);
+     void (*child) (void);
+     void *dso_handle;
+{
+  struct fork_handler *new_prepare = NULL;
+  struct fork_handler *new_parent = NULL;
+  struct fork_handler *new_child = NULL;
+
+  if (prepare != NULL)
+    {
+      new_prepare = (struct fork_handler *) malloc (sizeof (*new_prepare));
+      if (new_prepare == NULL)
+	goto out1;
+
+      new_prepare->handler = prepare;
+      new_prepare->dso_handle = dso_handle;
+    }
+
+  if (parent != NULL)
+    {
+      new_parent = (struct fork_handler *) malloc (sizeof (*new_parent));
+      if (new_parent == NULL)
+	goto out2;
+
+      new_parent->handler = parent;
+      new_parent->dso_handle = dso_handle;
+    }
+
+  if (child != NULL)
+    {
+      new_child = (struct fork_handler *) malloc (sizeof (*new_child));
+      if (new_child == NULL)
+	{
+	  free (new_parent);
+	out2:
+	  free (new_prepare);
+	out1:
+	  return errno;
+	}
+
+      new_child->handler = child;
+      new_child->dso_handle = dso_handle;
+    }
+
+  /* Get the lock to not conflict with running forks.  */
+  __libc_lock_lock (__fork_block.lock);
+
+  /* Now that we have all the handlers allocate enqueue them.  */
+  if (new_prepare != NULL)
+    list_add_tail (&new_prepare->list, &__fork_block.prepare_list);
+  if (new_parent != NULL)
+    list_add_tail (&new_parent->list, &__fork_block.parent_list);
+  if (new_child != NULL)
+    list_add_tail (&new_child->list, &__fork_block.child_list);
+
+  /* Release the lock.  */
+  __libc_lock_unlock (__fork_block.lock);
+
+  return 0;
+}