Tasklist: Concurrency and Callbacks
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Need improved callbacks mechanism
This is a migration of RT #50360; original text follows:
Parrot's NCI callback subsystem design will not work (and cannot be directly extended) for callbacks that do not carry an opaque user data pointer. Many existing callback-based APIs do not fit this description, including certain GUI toolkits such as GLUT.
Allison and others have brainstormed a few possible ideas, but none was fleshed out to the point of being implementable. The following threads on the parrot-porters mailing list covered part of this:
Also, I've attached some IRC discussion of this (slightly edited as per participant's request).
See https://github.com/parrot/parrot/issues/492 for more details.