Re: [TCLCORE] event-loop, vwait & coroutines

Andreas Leitgeb wrote:

> Since Tcl 8.6, we got coroutines, and they could have solved your> problem:>> A coroutine is a "task" that will run given code, which can "yield"> (which is like a pre-mature "return", while holding the current stack)> and later be called again to continue right where it last yielded.>> You can call the coroutine from an event-handler, have it do some> part of its job then yield - thereby going right back to the event-loop> until it gets called again.

The coroutine package in tcllib provides a coroutine-aware version of 
vwait that can be freely nested without blocking other invocations of 
itself, provided it is called from within a coroutine (meaning your 
callbacks/event handlers/bind scripts should be coroutines themselves).

http://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/coroutine/tcllib_coroutine.html

-J

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