Hi SubZero,
I hope you received my reply to you and got everything ok between us. I
have
a question for you:
I got it, don´t worry, I wasn´t mad, I was just thinking that I was asking
something obvious hehe, I thought that it was a silly question, since I
don´t have much knowlege on how TWSocket works internally ;)
I have tried to find this finding before here but nobody seemed to know
it.
So it is very interesting. Did you find this by testing or from a
Microsoft
KB? If so, which one?
Humm, it was just testing, and it is pretty easy to test, and it just
happens in service application, so, I don´t really know why does it happens,
here is a simple code for a service application:
InitializeDebugLog;
for i := 0 to 10000 do
begin
if AllocateHWnd(WndProc) = 0 then
DebugMessage('Error creating handle - ' + IntToStr(i));
end;
DebugLog is a routine that I have just to write debug messages into a text
file
The result of this application when running in a service as LocalSystem
account without desktop interaction is:
13/08/2010 - 10:48:41: Error creating handle - 2265
13/08/2010 - 10:48:41: Error creating handle - 2266
13/08/2010 - 10:48:41: Error creating handle - 2267
...
13/08/2010 - 10:48:41: Error creating handle - 10000
The result of this application when running in a service as LocalSystem
account WITH desktop interaction is:
13/08/2010 - 10:49:44: Error creating handle - 9982
13/08/2010 - 10:49:44: Error creating handle - 9983
13/08/2010 - 10:49:44: Error creating handle - 9984
...
13/08/2010 - 10:49:44: Error creating handle - 10000
So, when running without desktop interaction I can create at most 2264
handles, and with desktop interaction I can create 9981 handles!
That is why I can create 139.733 instances of TWSocket in a service app with
desktop interaction and 30.239 instances of TWSocket in a service app
without desktop interaction
Since TWSocket share the same handle among different instances, it can
create MANY sockets, that was a nice idea
Now I just want to know, WHY does windows limit the handles in a service app
without desktop interaction (Maybe to protect other services from running
out of resources?)
Eric
--
To unsubscribe or change your settings for TWSocket mailing list
please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket
Visit our website at http://www.overbyte.be
