diff options
Diffstat (limited to 'lib/fd-hook.c')
-rw-r--r-- | lib/fd-hook.c | 116 |
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 |