Re: [TCLCORE] TIP #361: Releasing Channel Buffers

[Lars H. <Lar...@re...>]

Alexandre Ferrieux skrev:
> Indeed, Tcl's nonblocking write is a high-level tool that lets the
> programmer "fire and forget" about what he's just written. In
> contrast, C-level nonblocking writes just report the number of bytes
> actually written, letting the caller resubmit the unwritten part later
> if he sees fit. Currently, Tcl always "sees fit", and does so in
> background with a hidden [fileevent writable].
> 
> This implies that it is currently impossible at script level to
> emulate the lower-level short write semantics. I do know of cases
> where it matters: I've been forced to do that in C :/
> 
> Now, the second of Wayne's proposals, slightly extended, does the job:
> 
>    set discarded [chan clear $ch]

Would that make $discarded the number of bytes that were discarded, or 
the actual material (bytearray) that was discarded?

Lars Hellström