gc.txt: more details about what gc does

diff --git a/object.c b/object.c
index 06ba3a11d87ad7b93f29aef535e773fcc4683004..9e6f9ff20b03f800edae8ec7adc26e30313a5616 100644 (file)
--- a/object.c
+++ b/object.c
@@ -141,7 +141,6 @@ void *create_object(const unsigned char *sha1, void *o)
        struct object *obj = o;
 
        obj->parsed = 0;
-       obj->used = 0;
        obj->flags = 0;
        hashcpy(obj->oid.hash, sha1);
 
@@ -253,7 +252,7 @@ struct object *parse_object(const struct object_id *oid)
        if (obj && obj->parsed)
                return obj;
 
-       if ((obj && obj->type == OBJ_BLOB) ||
+       if ((obj && obj->type == OBJ_BLOB && has_object_file(oid)) ||
            (!obj && has_object_file(oid) &&
             sha1_object_info(oid->hash, NULL) == OBJ_BLOB)) {
                if (check_sha1_signature(repl, NULL, 0, NULL) < 0) {
@@ -354,6 +353,19 @@ static void object_array_release_entry(struct object_array_entry *ent)
        free(ent->path);
 }
 
+struct object *object_array_pop(struct object_array *array)
+{
+       struct object *ret;
+
+       if (!array->nr)
+               return NULL;
+
+       ret = array->objects[array->nr - 1].item;
+       object_array_release_entry(&array->objects[array->nr - 1]);
+       array->nr--;
+       return ret;
+}
+
 void object_array_filter(struct object_array *array,
                         object_array_each_func_t want, void *cb_data)
 {
@@ -377,8 +389,7 @@ void object_array_clear(struct object_array *array)
        int i;
        for (i = 0; i < array->nr; i++)
                object_array_release_entry(&array->objects[i]);
-       free(array->objects);
-       array->objects = NULL;
+       FREE_AND_NULL(array->objects);
        array->nr = array->alloc = 0;
 }
 
@@ -423,3 +434,14 @@ void clear_object_flags(unsigned flags)
                        obj->flags &= ~flags;
        }
 }
+
+void clear_commit_marks_all(unsigned int flags)
+{
+       int i;
+
+       for (i = 0; i < obj_hash_size; i++) {
+               struct object *obj = obj_hash[i];
+               if (obj && obj->type == OBJ_COMMIT)
+                       obj->flags &= ~flags;
+       }
+}