73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
|
/* Hook for making the close() function extensible.
|
||
|
|
Copyright (C) 2009, 2010 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
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/>. */
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef CLOSE_HOOK_H
|
||
|
|
#define CLOSE_HOOK_H
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* Currently, this entire code is only needed for the handling of sockets
|
||
|
|
on native Windows platforms. */
|
||
|
|
#if WINDOWS_SOCKETS
|
||
|
|
|
||
|
|
|
||
|
|
/* An element of the list of close hooks.
|
||
|
|
The fields of this structure are considered private. */
|
||
|
|
struct close_hook
|
||
|
|
{
|
||
|
|
/* Doubly linked list. */
|
||
|
|
struct close_hook *private_next;
|
||
|
|
struct close_hook *private_prev;
|
||
|
|
/* Function that treats the types of FD that it knows about and calls
|
||
|
|
execute_close_hooks (FD, REMAINING_LIST) as a fallback. */
|
||
|
|
int (*private_fn) (int fd, const struct close_hook *remaining_list);
|
||
|
|
};
|
||
|
|
|
||
|
|
/* This type of function closes FD, applying special knowledge for the FD
|
||
|
|
types it knows about, and calls execute_close_hooks (FD, REMAINING_LIST)
|
||
|
|
for the other FD types. */
|
||
|
|
typedef int (*close_hook_fn) (int fd, const struct close_hook *remaining_list);
|
||
|
|
|
||
|
|
/* Execute the close hooks in REMAINING_LIST.
|
||
|
|
Return 0 or -1, like close() would do. */
|
||
|
|
extern int execute_close_hooks (int fd, const struct close_hook *remaining_list);
|
||
|
|
|
||
|
|
/* Execute all close hooks.
|
||
|
|
Return 0 or -1, like close() would do. */
|
||
|
|
extern int execute_all_close_hooks (int fd);
|
||
|
|
|
||
|
|
/* Add a function to the list of close hooks.
|
||
|
|
The LINK variable points to a piece of memory which is guaranteed to be
|
||
|
|
accessible until the corresponding call to unregister_close_hook. */
|
||
|
|
extern void register_close_hook (close_hook_fn hook, struct close_hook *link);
|
||
|
|
|
||
|
|
/* Removes a function from the list of close hooks. */
|
||
|
|
extern void unregister_close_hook (struct close_hook *link);
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* CLOSE_HOOK_H */
|