Re: Waiting for Asynchronous Process

[Colin S. Miller]

Eric wrote:
> Suppose I'm writing a function that will compile 4 files (A, B, C, and
> D). The first three can compile in any order, but D must come last.
> I want the user to have a responsive Emacs while the compilations are
> going on.
>
> I could do (call-process "theCompiler" .... "A")
>                (call-process "theCompiler" .... "B") ...
> but then Emacs is "frozen" until all files are compiled.
>
> I could do (start-process ...), but then I can't seem to wait for the
> processes to all exit without causing Emacs to hang.
>
> I know that ELisp doesn't do multithreading. Is it possible to do what
> I want without creating a separate script outside of Emacs?

BTW,
"make -j" from M-x compile will do this, if you are using a Unix-based system.

HTH,
Colin S. Miller

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