Function reftable_stack_reload_once

reftable/stack.c:226–366

}

static int reftable_stack_reload_once(struct reftable_stack *st,
				      const char **names,
				      int reuse_open)
{
	size_t cur_len = !st->merged ? 0 : st->merged->tables_len;
	struct reftable_table **cur = NULL;
	struct reftable_table **reused = NULL;
	struct reftable_table **new_tables = NULL;
	size_t reused_len = 0, reused_alloc = 0, names_len;
	size_t new_tables_len = 0;
	struct reftable_merged_table *new_merged = NULL;
	struct reftable_buf table_path = REFTABLE_BUF_INIT;
	int err = 0;
	size_t i;

	if (cur_len) {
		cur = stack_copy_tables(st, cur_len);
		if (!cur) {
			err = REFTABLE_OUT_OF_MEMORY_ERROR;
			goto done;
		}
	}

	names_len = names_length(names);

	if (names_len) {
		new_tables = reftable_calloc(names_len, sizeof(*new_tables));
		if (!new_tables) {
			err = REFTABLE_OUT_OF_MEMORY_ERROR;
			goto done;
		}
	}

	while (*names) {
		struct reftable_table *table = NULL;
		const char *name = *names++;

		/* this is linear; we assume compaction keeps the number of
		   tables under control so this is not quadratic. */
		for (i = 0; reuse_open && i < cur_len; i++) {
			if (cur[i] && 0 == strcmp(cur[i]->name, name)) {
				table = cur[i];
				cur[i] = NULL;

				/*
				 * When reloading the stack fails, we end up
				 * releasing all new tables. This also
				 * includes the reused tables, even though
				 * they are still in used by the old stack. We
				 * thus need to keep them alive here, which we
				 * do by bumping their refcount.
				 */
				REFTABLE_ALLOC_GROW_OR_NULL(reused,
							    reused_len + 1,
							    reused_alloc);
				if (!reused) {
					err = REFTABLE_OUT_OF_MEMORY_ERROR;
					goto done;