Re: threading in a com server
- From: "Will Pearson" <will@xxxxxxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Thu, 13 Dec 2007 01:48:50 -0000
Hi Sean,
That's pretty much it for the typical case, i.e. the case where you new up an
object each time IClassFactory::CreateInstance is called. If you want to do
something a bit different in CreateInstance, say return a pointer to an
existing object, then you need to be aware that the constructor won't be
called. This is also true if you're passing the pointer around inside an app
and just calling AddRef manually.
It sounds like you are using the typical scenario and that you only intend to
have a single object created. So, my original advice should apply to you.
Will
----- Original Message -----
From: Sean Farrow
To: programmingblind@xxxxxxxxxxxxx
Sent: Wednesday, December 12, 2007 10:56 PM
Subject: RE: threading in a com server
Chers will that is what I thought. Sean.
------------------------------------------------------------------------------
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Will Pearson
Sent: 12 December 2007 22:24
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: threading in a com server
Hi Sean,
Yes, you should be. The different COM threading models, i.e. STA and MTA,
refer to how many threads can create a copy of that COM server at once. In
this respect using internal threads is no different to using a single threaded
COM server.
If you do use internal threads then you need to take into account all the
usual multithreading things, such as race conditions, synchronisation, dead
locks, etc.
Will
----- Original Message -----
From: Sean Farrow
To: programmingblind@xxxxxxxxxxxxx
Sent: Wednesday, December 12, 2007 8:22 PM
Subject: threading in a com server
Hi:
I am creating a com server that needs to monitor events set by a hook dll
in another process, The com server is a dll. Am I safe to creat a second thread
in the constructor to handle the events. The events will be trigged when a
memory-mapped file has been populated.
Any help apreciated.
Sean.
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