RE: Possible race condition notes

[Suhaib Siddiqi <ssiddiqi at inspirepharm dot com>]

> 2) Removing all #ifdef __CYGWIN__'d sections from WaitFor.c
> 	causes XWin to use a normal amount of CPU time, 1-2%,
> 	when idling; if input events, like mouse clicks and key strokes,
> 	are entered too quickly, ie. normal typing speed, then
> 	some of the events will get lost.  My favorite window caused
> 	XWin to crash after closing it 4 times.

Those changes were made because of DirectInput we were using in the previous
version of XWin.  Without the changes I made Xsever waited forever
(i.e.WaitForSomething).  In other those hacks were needed to work around M$
crap.
However those changes are not needed in win32-x11 and for that server I am
using
orginal WaitFor.c.  Have you tested your changes with your DirectX engine?
I 
believe you will run into a lot of WaitForSomething weirdness if you use
DirectX engine.

Suhaib

> 
> 3) Following step 2, then initializing the timeval structure
> 	to 0's before the call to Select on line 168 causes XWin.exe
> 	to consume 100% of available CPU time when idling; XWin 
> runs normally
> 	for all other purposes.  My test window caused a crash
> 	after 43 closes on my first test, on my second and third
> 	tests I lost count after 80 and gave up on trying to get
> 	XWin to crash.
> 
> 4) Following step 2, then passing Select a NULL for the pointer
> 	to a time out timeval structure causes xdmcp sessions to consume
> 	a normal amount of CPU time when idling; however, input events
> 	get lost if they are entered too quickly, as in 2; closing
> 	my test window caused a crash on the first close twice in a row,
> 	and it caused a crash on the second close on the third test.
> 	Running XWin with local xterm and vtwm clients causes XWin
> 	to freeze immediately after initializing vtwm and 
> displaying the xterm
> 	window.
> 
> I'm not even going to speculate as to what is going on.  I 
> just wanted to
> get this information out so that other people could look at 
> it and comment
> and/or use it as a base for their own bug hunting.
> 
> Harold
>