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find_pack_entry(): do not keep packed_git pointer locally

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Commit f7c22cc (always start looking up objects in the last used pack
first - 2007-05-30) introduce a static packed_git* pointer as an
optimization.  The kept pointer however may become invalid if
free_pack_by_name() happens to free that particular pack.

Current code base does not access packs after calling
free_pack_by_name() so it should not be a problem. Anyway, move the
pointer out so that free_pack_by_name() can reset it to avoid running
into troubles in future.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2012-02-01 20:48:55 +07:00 committed by Junio C Hamano
parent 95099731bf
commit c01f51cc75
1 changed files with 13 additions and 14 deletions
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27
sha1_file.c
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@ -54,6 +54,8 @@ static struct cached_object empty_tree = {
0
};
static struct packed_git *last_found_pack;
static struct cached_object *find_cached_object(const unsigned char *sha1)
{
int i;
@ -720,6 +722,8 @@ void free_pack_by_name(const char *pack_name)
close_pack_index(p);
free(p->bad_object_sha1);
*pp = p->next;
if (last_found_pack == p)
last_found_pack = NULL;
free(p);
return;
}
@ -2046,27 +2050,22 @@ static int fill_pack_entry(const unsigned char *sha1,
static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e)
{
static struct packed_git *last_found = (void *)1;
struct packed_git *p;
prepare_packed_git();
if (!packed_git)
return 0;
p = (last_found == (void *)1) ? packed_git : last_found;
do {
if (fill_pack_entry(sha1, e, p)) {
last_found = p;
return 1;
}
if (last_found_pack && fill_pack_entry(sha1, e, last_found_pack))
return 1;
if (p == last_found)
p = packed_git;
else
p = p->next;
if (p == last_found)
p = p->next;
} while (p);
for (p = packed_git; p; p = p->next) {
if (p == last_found_pack || !fill_pack_entry(sha1, e, p))
continue;
last_found_pack = p;
return 1;
}
return 0;
}