code.delx.au - gnu-emacs-elpa/blob - README.md

   1 # emacs-async
   2
   3 Adds the ability to process Lisp concurrently, with a very simple syntax:
   4
   5     (async-start
   6        ;; What to do in the child process
   7        (lambda ()
   8          (message "This is a test")
   9          (sleep-for 3)
  10          222)
  11
  12        ;; What to do when it finishes
  13        (lambda (result)
  14          (message "Async process done, result should be 222: %s" result)))
  15
  16 If you omit the callback function, `async-start` will return a process object
  17 that you can `async-get` on when you're ready to wait for the result value:
  18
  19     (let ((proc (async-start
  20                    ;; What to do in the child process
  21                    (lambda ()
  22                      (message "This is a test")
  23                      (sleep-for 3)
  24                      222))))
  25         (message "I'm going to do some work here")
  26         ;; ....
  27         (message "Async process done, result should be 222: %s"
  28                  (async-get proc)))