[pacman-dev] [PATCH] Add a helper macro to free() dload_payload structure

[Anatol Pomozov]

Hi

On Sun, Apr 26, 2020 at 4:54 PM Allan McRae <allan at archlinux.org> wrote:
>
> On 24/4/20 2:40 pm, Anatol Pomozov wrote:
> > It frees all the dynamically allocated fields plus the struct itself
> >
>
> How many times will you use this?   Across how many functions?

Currently my tree uses this macro 6 times. All of them in error
codepath like this one:

STRDUP(payload->fileurl, url,
    DLOAD_PAYLOAD_FREE(payload); GOTO_ERR(handle, ALPM_ERR_MEMORY, err));

An alternative to it is to inline DLOAD_PAYLOAD_FREE() macro into the
STRDUP parameter.
But it might look too verbose in this use-case:

STRDUP(payload->fileurl, url,
    _alpm_dload_payload_reset(payload);  FREE(payload);
    GOTO_ERR(handle, ALPM_ERR_MEMORY, err));

> We usually #unset defines not used globally too.

I am not sure I understand this #unset requirement. Could you please
give an example how it should work here?