Re: Pointer ownership

[Dirk Van Haerenborgh <vhdirk@gmail.com>]

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Thanks.

For the most part, that's what I ended up with, but the thread 'stealing' a
message will be quite hard to implement in Rust, I guess.
When using notmuch_query_search_messages, I was assuming the resulting
individual messages to be owned by the query.
So, if at a later point in time, one uses notmuch_query_search_threads,
will the ownership of a previous message abruptly be
transferred from query to thread?
I do want to be able to run *_destroy at some point :)

-Dirk


On Thu, 20 Dec 2018 at 10:11, David Bremner <david@tethera.net> wrote:

> Dirk Van Haerenborgh <vhdirk@gmail.com> writes:
>
>
> > For instance, when iterating messages from a thread: Can one still use a
> > notmuch_message_t* when the thread is destroyed?
> > Are the individual
> > messages 'owned' by the thread, or only by the query? Same question for
> > 'replies'.
> >
> > Could someone please shed some light on this? I'd very much appreciate
> it.
>
> It's hierarchical (the underlying allocator is talloc). So threads are
> owned by the corresponding query, and messages are owned by threads.
>
> Assuming replies refers to notmuch_message_get_replies, then those are
> owned by some thread as well.
>
> Threads are somewhat lazily constructed, so there's a time where a
> message is owned by a query before it is "stolen" by a thread.
>
> This is all Carl's design, so hopefully he'll correct me if I said
> anything outrageously wrong.
>
> d
>
>
>
>

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