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do_for_each_entry(): increment the packed refs cache refcount 

This function calls a user-supplied callback function which could do
something that causes the packed refs cache to be invalidated.  So
acquire a reference count on the data structure to prevent our copy
from being freed while we are iterating over it.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2013-06-20 10:37:48 +02:00 committed by Junio C Hamano
parent 5f5e2a8868
commit 8baf2bb99a
1 changed files with 4 additions and 1 deletions
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5
refs.c
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@ -1590,10 +1590,12 @@ void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname)
static int do_for_each_entry(struct ref_cache *refs, const char *base,
each_ref_entry_fn fn, void *cb_data)
{
struct ref_dir *packed_dir = get_packed_refs(refs);
struct packed_ref_cache *packed_ref_cache = get_packed_ref_cache(refs);
struct ref_dir *packed_dir = get_packed_ref_dir(packed_ref_cache);
struct ref_dir *loose_dir = get_loose_refs(refs);
int retval = 0;
acquire_packed_ref_cache(packed_ref_cache);
if (base && *base) {
packed_dir = find_containing_dir(packed_dir, base, 0);
loose_dir = find_containing_dir(loose_dir, base, 0);
@ -1614,6 +1616,7 @@ static int do_for_each_entry(struct ref_cache *refs, const char *base,
loose_dir, 0, fn, cb_data);
}
release_packed_ref_cache(packed_ref_cache);
return retval;
}