[fpc-devel] TProcess.NumBytesAvailable

Vincent Snijders vsnijders at quicknet.nl
Wed Jan 31 16:57:03 CET 2007

Vincent Snijders schreef:
> Marc Weustink schreef:
>> Vincent Snijders wrote:
>>> Hi,
>>> TAsyncProcess from the LCL has a property NumBytesAvailable. Attached 
>>> patch adds it to TProcess in the FCL.
>>> NumBytesAvailable checks how many bytes are available in 
>>> TProcess.Output, so you can  decide not to read from it if there are 
>>> no bytes available.
>> What about StdErr output ?
>> Cant this be a property of the TInputPipeStream ?
> Seems like an good idea. I will create a new patch.
> Jonas Maebe schreef:
>  >
>  > The FIONREAD constant is available in the termio units of both Darwin
>  > and FreeBSD as of 2.0.4 (not for Open/NetBSD, but that's probably the
>  > least of the things which need to be changed to get those platforms
>  > going again).
> Thanks for the hint. I guess this was not yet the case when 
> TAsyncProcess was written by Micha.

Attached is a new patch.

I didn't how to implement this for OS/2.

If the CreatePipes function was not implemented, I assume that poUsePipes cannot be 
used. GetNumBytesAvailable returns 0 is such cases.

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