Re: [MIT-Scheme-devel] Threads in MIT Scheme

[Matt Birkholz]

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On Sun, 2019-04-28 at 21:08 +0000, Aaron Blake Mitchell wrote:
> [...]
> To be more specific:
> 
> (define (thunk x) (lambda () x))
> 
> In Racket:
> 
> (thread (thunk (begin (sleep 2000) (display 2))))
> 
> returns immediately with a thread object, and then 2 seconds later
> displays 2 to the console.

In Scheme the begin expression is evaluated and the thunk procedure
applied to its value.

> [...]
> Also, there are quite a few functions in the thread.scm that don't
> seem to be available in Scheme. Some of them work and some are
> undefined in a Scheme REPL. For example, create-thread, current-
> thread, threads-list all work, but run-thread and some others aren't
> defined.

The procedures not defined in the REPL are not exported to the global
package () and are internals with which you probably shouldn't mess.

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