On Jan 28, 2008, at 12:36 PM, Christian Schmitz wrote:
> Hi,
>
> Can someone test for me the ThreadMBS class on Windows and Linux?
>
> I'd like to know how well it does on a PC with more than 2 Cores, if
> possible.
>
> On my 8 core Mac Pro I got CPU usage up to 790% for my test
> application.
I'm curious as to how you dealt with the fact that REALbasic is not
thread-safe. I notice that you do have LockRuntime methods, but even
invoking the LockRuntime methods can cause reference counts to go our
of whack. If two threads access an object at the same time (just
simply refer to it, store a separate copy, etc), the reference count
will increase. If both threads do it at once, it is possible for the
REALbasic runtime to get in a situation where the reference count was
only incremented once, because it isn't thread-safe. This will then
yield a crash once the object is unlocked for the final time.
Same story with all other reference counted types.
The REALbasic runtime *needs* thread-safety. Until it's thread-safe,
the only safe methods you can write in REALbasic code are strictly
mathematical functions in global modules that don't refer to any
objects or strings.
-Jon
--
Jonathan Johnson
President
Alacatia Labs, Inc.
http://www.alacatialabs.com/
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