Re:Re: "Asynchronous Requests from Emacs Dynamic Modules"

["Zhu Zihao" <all_but_last@163.com>]

[-- Attachment #1: Type: text/plain, Size: 1405 bytes --]

Ok, But how to do this in Emacs version 25-27?


Emacs doesn't support named pipe access, but may be we can use `make-network-process` to open a TCP socket. Like this?


```
(let ((proc (make-network-process :name "fake-proxy-process"
                     :server t
                     :host 'local
                     :filter <filter-to-execute-callback>
                     :noquery t
                     ;; Detect port automatically
                     :service t)))
     (setq <global-proc-var> proc)
     (module-function-initialize-notify (process-contact proc :service)))
```


But this maybe too strange for user to understand why a dynamic module require a TCP port access...






At 2020-10-31 20:49:21, "Stefan Monnier" <monnier@iro.umontreal.ca> wrote:
>> With Emacs 28, you can get a file descriptor to a pipe process and
>> send arbitrary data there (from arbitrary threads).
>
>Cool, so that takes care of it.
>
>> You'd still need some small protocol (e.g. JSON) to encode/decode
>> requests, but with that you can send arbitrary requests
>> back asynchronously.
>
>I don't think you need a complex protocol: just stash somewhere (inside
>the module data structures) the data you need for the async request,
>then send a dummy byte to the pipe.  On the Lisp side, just install
>a process-filter which calls back the module to "run any pending async
>requests".
>
>
>        Stefan
>

[-- Attachment #2: Type: text/html, Size: 2385 bytes --]