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 @@ | |||
| 1 | /* Hook for making the close() function extensible. | ||
| 2 | Copyright (C) 2009, 2010 Free Software Foundation, Inc. | ||
| 3 | Written by Bruno Haible <bruno@clisp.org>, 2009. | ||
| 4 | |||
| 5 | This program is free software: you can redistribute it and/or modify it | ||
| 6 | under the terms of the GNU General Public License as published | ||
| 7 | by the Free Software Foundation; either version 3 of the License, or | ||
| 8 | (at your option) any later version. | ||
| 9 | |||
| 10 | This program is distributed in the hope that it will be useful, | ||
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 13 | Lesser General Public License for more details. | ||
| 14 | |||
| 15 | You should have received a copy of the GNU General Public License | ||
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | ||
| 17 | |||
| 18 | #include <config.h> | ||
| 19 | |||
| 20 | /* Specification. */ | ||
| 21 | #include "close-hook.h" | ||
| 22 | |||
| 23 | #include <stdlib.h> | ||
| 24 | #include <unistd.h> | ||
| 25 | |||
| 26 | #undef close | ||
| 27 | |||
| 28 | |||
| 29 | /* Currently, this entire code is only needed for the handling of sockets | ||
| 30 | on native Windows platforms. */ | ||
| 31 | #if WINDOWS_SOCKETS | ||
| 32 | |||
| 33 | /* The first and last link in the doubly linked list. | ||
| 34 | Initially the list is empty. */ | ||
| 35 | static struct close_hook anchor = { &anchor, &anchor, NULL }; | ||
| 36 | |||
| 37 | int | ||
| 38 | execute_close_hooks (int fd, const struct close_hook *remaining_list) | ||
| 39 | { | ||
| 40 | if (remaining_list == &anchor) | ||
| 41 | /* End of list reached. */ | ||
| 42 | return close (fd); | ||
| 43 | else | ||
| 44 | return remaining_list->private_fn (fd, remaining_list->private_next); | ||
| 45 | } | ||
| 46 | |||
| 47 | int | ||
| 48 | execute_all_close_hooks (int fd) | ||
| 49 | { | ||
| 50 | return execute_close_hooks (fd, anchor.private_next); | ||
| 51 | } | ||
| 52 | |||
| 53 | void | ||
| 54 | register_close_hook (close_hook_fn hook, struct close_hook *link) | ||
| 55 | { | ||
| 56 | if (link->private_next == NULL && link->private_prev == NULL) | ||
| 57 | { | ||
| 58 | /* Add the link to the doubly linked list. */ | ||
| 59 | link->private_next = anchor.private_next; | ||
| 60 | link->private_prev = &anchor; | ||
| 61 | link->private_fn = hook; | ||
| 62 | anchor.private_next->private_prev = link; | ||
| 63 | anchor.private_next = link; | ||
| 64 | } | ||
| 65 | else | ||
| 66 | { | ||
| 67 | /* The link is already in use. */ | ||
| 68 | if (link->private_fn != hook) | ||
| 69 | abort (); | ||
| 70 | } | ||
| 71 | } | ||
| 72 | |||
| 73 | void | ||
| 74 | unregister_close_hook (struct close_hook *link) | ||
| 75 | { | ||
| 76 | struct close_hook *next = link->private_next; | ||
| 77 | struct close_hook *prev = link->private_prev; | ||
| 78 | |||
| 79 | if (next != NULL && prev != NULL) | ||
| 80 | { | ||
| 81 | /* The link is in use. Remove it from the doubly linked list. */ | ||
| 82 | prev->private_next = next; | ||
| 83 | next->private_prev = prev; | ||
| 84 | /* Clear the link, to mark it unused. */ | ||
| 85 | link->private_next = NULL; | ||
| 86 | link->private_prev = NULL; | ||
| 87 | link->private_fn = NULL; | ||
| 88 | } | ||
| 89 | } | ||
| 90 | |||
| 91 | #endif | ||
