4 Commits

Author	SHA1	Message	Date
Edwin Brady	5ed27947cb	Small concurrency fixes ... Conditional variables with timeout in Chez didn't work, so changed to a consistent meaning of the timeout (microseconds). Also fix linearity of unsafePerformIO.	2020-06-23 19:06:30 +01:00
Edwin Brady	d12487f529	HasIO interface for IO actions ... Also updates the Prelude and some base libraries to use HasIO rather than using IO directly.	2020-06-21 01:18:43 +01:00
Edwin Brady	d60feaace0	Add finalisers to Chez back end ... This involves new primitives GCPtr and GCAnyPtr which are pointer types that have finalisers attached. The finalisers are run when the associated pointer goes out of scope. In the test, I am assuming that the GC will only be called once, right at the end. Otherwise, the output isn't guaranteed to be deterministic! Let's see how this assumption holds... This is currently Chez only. I think it'll be easy enough to add to the Racket and Gambit back ends too.	2020-06-08 20:34:23 +01:00
Edwin Brady	dec7dff622	Add libraries	2020-05-18 14:00:08 +01:00