Nikolay Pavlov wrote:
> 2015-06-13 17:02 GMT+03:00 AA <[email protected]>:
> > When I update the statusline from a python thread forked from main, the
> > update gets registered by vim but is shown only after take an action, a
> > movement using keys, or a mouse scroll.
> >
> > Python code here if it helps: http://sprunge.us/LCfM (Open in vim followed
> > by :pyfile %)
> >
> > Briefly: Spawn threads, each threads sleeps for a while and then updates
> > the statusline. Don't do anything and you'll never notice the update. Keep
> > j/k pressed and all updates show fine.
> >
> > So my question is: Is there a way in which I can make the status updates
> > immediate, without requiring any user action?
>
> Vim is not thread-safe. You *must not* update statusline in another
> thread, especially doing this using `set statusline` command (there is
> also a variant where you use `vim.options` and/or {window}.options
> ({window}: object from vim.windows or vim.current.window)). Most
> likely after some time this code is running you will get a crash
> because Vim is using many globals (using .options will touch much less
> amount of globals compared to vim.command('set statusline=' …)).
>
> Another bad idea was using Python code using :pyfile. This command
> pushes all variables/functions defined in the sourced file into global
> namespace so with big amount of plugins that use :pyfile you will
> definitely run into problems.
It should be possible to make a message queue, like we process netbeans
requests. Only the queue itself needs to be thread-safe.
The messages could be Ex commands or expressions. They are handled
while waiting for a character to be typed.
Should be fairly simple. We do need something to wake up select() or
poll().
Since the Python interface is quite well worked out (Nikolay did a lot
of work on it :-), and Python supports spawning processes and threads,
this should allow for most asynchronous things.
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