Revision 25ab004c53cdcfea485e5bf437aeaa74df47196d authored by Junio C Hamano on 17 October 2016, 20:25:20 UTC, committed by Junio C Hamano on 17 October 2016, 20:25:20 UTC
In order for the receiving end of "git push" to inspect the received history and decide to reject the push, the objects sent from the sending end need to be made available to the hook and the mechanism for the connectivity check, and this was done traditionally by storing the objects in the receiving repository and letting "git gc" to expire it. Instead, store the newly received objects in a temporary area, and make them available by reusing the alternate object store mechanism to them only while we decide if we accept the check, and once we decide, either migrate them to the repository or purge them immediately. * jk/quarantine-received-objects: tmp-objdir: do not migrate files starting with '.' tmp-objdir: put quarantine information in the environment receive-pack: quarantine objects until pre-receive accepts tmp-objdir: introduce API for temporary object directories check_connected: accept an env argument
list.h
/*
* Copyright (C) 2002 Free Software Foundation, Inc.
* (originally part of the GNU C Library and Userspace RCU)
* Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
*
* Copyright (C) 2009 Pierre-Marc Fournier
* Conversion to RCU list.
* Copyright (C) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/>.
*/
#ifndef LIST_H
#define LIST_H 1
/*
* The definitions of this file are adopted from those which can be
* found in the Linux kernel headers to enable people familiar with the
* latter find their way in these sources as well.
*/
/* Basic type for the double-link list. */
struct list_head {
struct list_head *next, *prev;
};
/* avoid conflicts with BSD-only sys/queue.h */
#undef LIST_HEAD
/* Define a variable with the head and tail of the list. */
#define LIST_HEAD(name) \
struct list_head name = { &(name), &(name) }
/* Initialize a new list head. */
#define INIT_LIST_HEAD(ptr) \
(ptr)->next = (ptr)->prev = (ptr)
#define LIST_HEAD_INIT(name) { &(name), &(name) }
/* Add new element at the head of the list. */
static inline void list_add(struct list_head *newp, struct list_head *head)
{
head->next->prev = newp;
newp->next = head->next;
newp->prev = head;
head->next = newp;
}
/* Add new element at the tail of the list. */
static inline void list_add_tail(struct list_head *newp, struct list_head *head)
{
head->prev->next = newp;
newp->next = head;
newp->prev = head->prev;
head->prev = newp;
}
/* Remove element from list. */
static inline void __list_del(struct list_head *prev, struct list_head *next)
{
next->prev = prev;
prev->next = next;
}
/* Remove element from list. */
static inline void list_del(struct list_head *elem)
{
__list_del(elem->prev, elem->next);
}
/* Remove element from list, initializing the element's list pointers. */
static inline void list_del_init(struct list_head *elem)
{
list_del(elem);
INIT_LIST_HEAD(elem);
}
/* Delete from list, add to another list as head. */
static inline void list_move(struct list_head *elem, struct list_head *head)
{
__list_del(elem->prev, elem->next);
list_add(elem, head);
}
/* Replace an old entry. */
static inline void list_replace(struct list_head *old, struct list_head *newp)
{
newp->next = old->next;
newp->prev = old->prev;
newp->prev->next = newp;
newp->next->prev = newp;
}
/* Join two lists. */
static inline void list_splice(struct list_head *add, struct list_head *head)
{
/* Do nothing if the list which gets added is empty. */
if (add != add->next) {
add->next->prev = head;
add->prev->next = head->next;
head->next->prev = add->prev;
head->next = add->next;
}
}
/* Get typed element from list at a given position. */
#define list_entry(ptr, type, member) \
((type *) ((char *) (ptr) - offsetof(type, member)))
/* Get first entry from a list. */
#define list_first_entry(ptr, type, member) \
list_entry((ptr)->next, type, member)
/* Iterate forward over the elements of the list. */
#define list_for_each(pos, head) \
for (pos = (head)->next; pos != (head); pos = pos->next)
/*
* Iterate forward over the elements list. The list elements can be
* removed from the list while doing this.
*/
#define list_for_each_safe(pos, p, head) \
for (pos = (head)->next, p = pos->next; \
pos != (head); \
pos = p, p = pos->next)
/* Iterate backward over the elements of the list. */
#define list_for_each_prev(pos, head) \
for (pos = (head)->prev; pos != (head); pos = pos->prev)
/*
* Iterate backwards over the elements list. The list elements can be
* removed from the list while doing this.
*/
#define list_for_each_prev_safe(pos, p, head) \
for (pos = (head)->prev, p = pos->prev; \
pos != (head); \
pos = p, p = pos->prev)
static inline int list_empty(struct list_head *head)
{
return head == head->next;
}
static inline void list_replace_init(struct list_head *old,
struct list_head *newp)
{
struct list_head *head = old->next;
list_del(old);
list_add_tail(newp, head);
INIT_LIST_HEAD(old);
}
#endif /* LIST_H */
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