[PATCH 2/3] object-store: factor out odb_clear_loose_cache()

[René Scharfe <l.s.r@xxxxxx>]

Add and use a function for emptying the loose object cache, so callers
don't have to know any of its implementation details.

Signed-off-by: Rene Scharfe <l.s.r@xxxxxx>
---
 object-store.h | 3 +++
 object.c       | 2 +-
 packfile.c     | 7 ++-----
 sha1-file.c    | 7 +++++++
 4 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/object-store.h b/object-store.h
index 7236c571c0..709bf856b6 100644
--- a/object-store.h
+++ b/object-store.h
@@ -61,6 +61,9 @@ void odb_load_loose_cache(struct object_directory *odb, int subdir_nr);
 struct oid_array *odb_loose_cache(struct object_directory *odb,
 				  const struct object_id *oid);
 
+/* Empty the loose object cache for the specified object directory. */
+void odb_clear_loose_cache(struct object_directory *odb);
+
 struct packed_git {
 	struct packed_git *next;
 	struct list_head mru;
diff --git a/object.c b/object.c
index 79d636091c..a5c5cf830f 100644
--- a/object.c
+++ b/object.c
@@ -485,7 +485,7 @@ struct raw_object_store *raw_object_store_new(void)
 static void free_object_directory(struct object_directory *odb)
 {
 	free(odb->path);
-	oid_array_clear(&odb->loose_objects_cache);
+	odb_clear_loose_cache(odb);
 	free(odb);
 }
 
diff --git a/packfile.c b/packfile.c
index 8c6b47cc77..0fe9c21bf1 100644
--- a/packfile.c
+++ b/packfile.c
@@ -994,11 +994,8 @@ void reprepare_packed_git(struct repository *r)
 {
 	struct object_directory *odb;
 
-	for (odb = r->objects->odb; odb; odb = odb->next) {
-		oid_array_clear(&odb->loose_objects_cache);
-		memset(&odb->loose_objects_subdir_seen, 0,
-		       sizeof(odb->loose_objects_subdir_seen));
-	}
+	for (odb = r->objects->odb; odb; odb = odb->next)
+		odb_clear_loose_cache(odb);
 
 	r->objects->approximate_object_count_valid = 0;
 	r->objects->packed_git_initialized = 0;
diff --git a/sha1-file.c b/sha1-file.c
index cb8583b634..2f965b2688 100644
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -2178,6 +2178,13 @@ void odb_load_loose_cache(struct object_directory *odb, int subdir_nr)
 	strbuf_release(&buf);
 }
 
+void odb_clear_loose_cache(struct object_directory *odb)
+{
+	oid_array_clear(&odb->loose_objects_cache);
+	memset(&odb->loose_objects_subdir_seen, 0,
+	       sizeof(odb->loose_objects_subdir_seen));
+}
+
 static int check_stream_sha1(git_zstream *stream,
 			     const char *hdr,
 			     unsigned long size,
-- 
2.20.1