aboutsummaryrefslogtreecommitdiff
path: root/lib/fd-hook.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/fd-hook.c')
-rw-r--r--lib/fd-hook.c116
1 files changed, 0 insertions, 116 deletions
diff --git a/lib/fd-hook.c b/lib/fd-hook.c
deleted file mode 100644
index 0171cc60..00000000
--- a/lib/fd-hook.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/* Hook for making making file descriptor functions close(), ioctl() extensible.
- Copyright (C) 2009-2014 Free Software Foundation, Inc.
- Written by Bruno Haible <bruno@clisp.org>, 2009.
-
- This program is free software: you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program 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
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
-
-#include <config.h>
-
-/* Specification. */
-#include "fd-hook.h"
-
-#include <stdlib.h>
-
-/* Currently, this entire code is only needed for the handling of sockets
- on native Windows platforms. */
-#if WINDOWS_SOCKETS
-
-/* The first and last link in the doubly linked list.
- Initially the list is empty. */
-static struct fd_hook anchor = { &anchor, &anchor, NULL, NULL };
-
-int
-execute_close_hooks (const struct fd_hook *remaining_list, gl_close_fn primary,
- int fd)
-{
- if (remaining_list == &anchor)
- /* End of list reached. */
- return primary (fd);
- else
- return remaining_list->private_close_fn (remaining_list->private_next,
- primary, fd);
-}
-
-int
-execute_all_close_hooks (gl_close_fn primary, int fd)
-{
- return execute_close_hooks (anchor.private_next, primary, fd);
-}
-
-int
-execute_ioctl_hooks (const struct fd_hook *remaining_list, gl_ioctl_fn primary,
- int fd, int request, void *arg)
-{
- if (remaining_list == &anchor)
- /* End of list reached. */
- return primary (fd, request, arg);
- else
- return remaining_list->private_ioctl_fn (remaining_list->private_next,
- primary, fd, request, arg);
-}
-
-int
-execute_all_ioctl_hooks (gl_ioctl_fn primary,
- int fd, int request, void *arg)
-{
- return execute_ioctl_hooks (anchor.private_next, primary, fd, request, arg);
-}
-
-void
-register_fd_hook (close_hook_fn close_hook, ioctl_hook_fn ioctl_hook, struct fd_hook *link)
-{
- if (close_hook == NULL)
- close_hook = execute_close_hooks;
- if (ioctl_hook == NULL)
- ioctl_hook = execute_ioctl_hooks;
-
- if (link->private_next == NULL && link->private_prev == NULL)
- {
- /* Add the link to the doubly linked list. */
- link->private_next = anchor.private_next;
- link->private_prev = &anchor;
- link->private_close_fn = close_hook;
- link->private_ioctl_fn = ioctl_hook;
- anchor.private_next->private_prev = link;
- anchor.private_next = link;
- }
- else
- {
- /* The link is already in use. */
- if (link->private_close_fn != close_hook
- || link->private_ioctl_fn != ioctl_hook)
- abort ();
- }
-}
-
-void
-unregister_fd_hook (struct fd_hook *link)
-{
- struct fd_hook *next = link->private_next;
- struct fd_hook *prev = link->private_prev;
-
- if (next != NULL && prev != NULL)
- {
- /* The link is in use. Remove it from the doubly linked list. */
- prev->private_next = next;
- next->private_prev = prev;
- /* Clear the link, to mark it unused. */
- link->private_next = NULL;
- link->private_prev = NULL;
- link->private_close_fn = NULL;
- link->private_ioctl_fn = NULL;
- }
-}
-
-#endif