|
|
|
|
|
|
by TeMPOraL
1299 days ago
|
|
|
I want to see good interactive tools for working with and introspecting threads / async / other concurrency models first. In general, because I don't know of any, and in Emacs in particular. My current experience with Emacs concurrency is mostly negative - occasionally, an async-heavy package (like e.g. Magit-style UI for Docker) will break, and I find it hard to figure out why. Futures-heavy code I've seen tends to keep critical data local (lexically let-bound), which is the opposite of what you want in a malleable system like Emacs. For example, I'd like to have a way to list all unresolved futures everywhere in Emacs, the way I can with e.g. external processes. But it seems that at least the async library used (aio, IIRC) is not designed for that. |
|
|
I think you could get this done by advising promise creation/resolution functions, aio-promise and aio-resolve. The async/await macros are wrappers around generators-over-promises in this library.
But yes, in general Emacs concurrency sucks. The least bad option I found was using promises' implementation (chuntaro/emacs-promise) that uses `cl-defgeneric` for `promise-then` and (obviously) moving as much processing to a subprocess as possible. The former allows you to make any type "thenable" by implementing the method for it, which is nice for bundling the state around async operations. cl-defstructs are nice for the purpose.