diff options
Diffstat (limited to 'gl/close-hook.c')
-rw-r--r-- | gl/close-hook.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/gl/close-hook.c b/gl/close-hook.c deleted file mode 100644 index 0253c4dc..00000000 --- a/gl/close-hook.c +++ /dev/null @@ -1,91 +0,0 @@ -/* Hook for making the close() function extensible. - Copyright (C) 2009, 2010 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 - Lesser 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 "close-hook.h" - -#include <stdlib.h> -#include <unistd.h> - -#undef close - - -/* 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 close_hook anchor = { &anchor, &anchor, NULL }; - -int -execute_close_hooks (int fd, const struct close_hook *remaining_list) -{ - if (remaining_list == &anchor) - /* End of list reached. */ - return close (fd); - else - return remaining_list->private_fn (fd, remaining_list->private_next); -} - -int -execute_all_close_hooks (int fd) -{ - return execute_close_hooks (fd, anchor.private_next); -} - -void -register_close_hook (close_hook_fn hook, struct close_hook *link) -{ - 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_fn = hook; - anchor.private_next->private_prev = link; - anchor.private_next = link; - } - else - { - /* The link is already in use. */ - if (link->private_fn != hook) - abort (); - } -} - -void -unregister_close_hook (struct close_hook *link) -{ - struct close_hook *next = link->private_next; - struct close_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_fn = NULL; - } -} - -#endif |