100 % CPU in Borland 3.1

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3 total messages Started by Jim Tue, 22 Jul 2003 03:01

#50

Author: Jim
Date: Tue, 22 Jul 2003 03:01

8 lines
1168 bytes

Hello
We have an old Borland C++ 3.1 MDI application,
when running it uses 100 % of the CPU while sitting 
waiting for user input.
We have the source code and were wondering what we could do to
make this application use less CPU.
regards and thanks
Jim

Re: 100 % CPU in Borland 3.1

#51

Author: Henrik Haftmann
Date: Thu, 24 Jul 2003 13:19

12 lines
1833 bytes

> We have an old Borland C++ 3.1 MDI application,
> when running it uses 100 % of the CPU while sitting
> waiting for user input.
> We have the source code and were wondering what we could do to
> make this application use less CPU.
Look for an "idle" function. It will be invoked from MessageLoop
when PeekMessage() returns FALSE.
idle() must return FALSE too, then MessageLoop invokes WaitMessage(),
and the CPU can sleep.
If you find an "idle" function always returning TRUE, you have the bug.

henni

Re: 100 % CPU in Borland 3.1

#52

Author: Jim
Date: Fri, 25 Jul 2003 04:48

22 lines
1858 bytes

Henrik Haftmann <henrik.haftmann@e-technik.tu-chemnitz.de> wrote in message news:<3F1FDCCF.5035@e-technik.tu-chemnitz.de>...
> > We have an old Borland C++ 3.1 MDI application,
> > when running it uses 100 % of the CPU while sitting
> > waiting for user input.
> > We have the source code and were wondering what we could do to
> > make this application use less CPU.
> Look for an "idle" function. It will be invoked from MessageLoop
> when PeekMessage() returns FALSE.
> idle() must return FALSE too, then MessageLoop invokes WaitMessage(),
> and the CPU can sleep.
> If you find an "idle" function always returning TRUE, you have the bug.
> 
> henni

sorry henni
thats not useful old chap
the IdleAction function returns a void
you're thinking of a dialog based app, which this is not...this is an
MDI as i stated :(

cheers
Bryce

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