Very Computer

by **Tim** » Tue, 26 Oct 1999 04:00:00

I have three threads within a DLL, each supporting one device. Each
thread makes 400 calls to ReadFileEx per second or a total of 1200 calls
per second to ReadFileEx by the DLL.

Using one of the system tools, "System Monitor" I've discovered that I
have a memory leak which works out to one DWORD per call to ReadFileEx.
If I change the number of calls, the leak also decreases so it remains
equal to the number of calls to ReadFileEx.

Oher than the leak, all of the reads are functioning correctly, and the
data is as it should be.

Does anyone have any insight concering what might be happening?

Thanks,
Tim

by **Felix Kasza [MVP** » Tue, 26 Oct 1999 04:00:00

Tim,

> If I change the number of calls, the leak also decreases so it remains
> equal to the number of calls to ReadFileEx.

I would probably run this on NT next; OS bugs do not tend to be the same
on each platform. That should give a quick indicator of whether you have
an OS problem or not. At the same time, I would run the code under
Bounds Checker, but you probably did that already.

--

Cheers,

Felix.

If you post a reply, kindly refrain from emailing it, too.

No anti-spam address here. Just one comment: IN YOUR FACE!

by **Tim** » Wed, 27 Oct 1999 04:00:00

> Tim,

> > If I change the number of calls, the leak also decreases so it remains
> > equal to the number of calls to ReadFileEx.

> I would probably run this on NT next; OS bugs do not tend to be the same
> on each platform. That should give a quick indicator of whether you have
> an OS problem or not. At the same time, I would run the code under
> Bounds Checker, but you probably did that already.

> --

> Cheers,

> Felix.

> If you post a reply, kindly refrain from emailing it, too.

> No anti-spam address here. Just one comment: IN YOUR FACE!

The problem occurs in both 98 and NT.

Tim