[Tarantool-patches] [PATCH 1.10 v4 2/5] module api: export box_key_def_dup

[Alexander Turenko]

> +static int
> +test_key_def_dup(lua_State *L)
> +{
> +	box_key_def_t *key_def = NULL;
> +	box_key_part_def_t part;
> +	box_key_part_def_t *dump = NULL;
> +	uint32_t dump_part_count = 0;
> +
> +	key_part_def_set_nondefault(&part);
> +	key_def = box_key_def_new_v2(&part, 1);
> +	assert(key_def != NULL);
> +	box_key_def_t *key_def_dup = box_key_def_dup(key_def);
> +	assert(key_def_dup != NULL);
> +
> +	dump = box_key_def_dump_parts(key_def_dup, &dump_part_count);
> +	assert(dump != NULL);
> +	assert(dump_part_count == 1);
> +
> +	key_part_def_check_equal(&part, &dump[0]);
> +	key_part_def_check_zeros(&dump[0]);

key_part_def_check_zeros() is to verify how _dump_parts() works per se.
It has no any connection with the duplicated key_def content.

So I would left just key_part_def_check_equal() here.

> +
> +	box_key_def_delete(key_def_dup);
> +	box_key_def_delete(key_def);

The dumped parts are allocated on the box region. I would truncate the
region at the end:

 | size_t region_svp = box_region_used();
 | <...>
 | box_region_truncate(region_svp);

May be ignored in a test, but I would do so just to highlight the proper
usage of the API. If not us, who?

> +
> +	lua_pushboolean(L, 1);
> +	return 1;
> +}
> +