Invoke() execution

[vooose]

Suppose you call

this.Invoke(new MyDelegate(MyMethod));
this.Invoke(new MyDelegate(MyMethod2));

(assume not calling from owning thread so marshall occurs)

Is MyMethod *guaranteed* to finish execution before MyMethod2 starts?

Regards

--
Wal
http://www.vooose.com

*** Sent via Developersdex http://www.developersdex.com ***

[Yahoo]

If the mydelegate was async the method then it would kick off a new thread
and return. It could then do the same for the second line. Splitting hairs
here but the mydelegate method completed starting a new thread in a
different VM's sync. The threads that actually are carrying out the work in
different VM's are not dependent on eachother. They could be on different
machines.

http://www.codeproject.com/csharp/delegate_bedtime.asp

"vooose" <no****@microsoft.com> wrote in message
news:%2******************@TK2MSFTNGP15.phx.gbl...

Suppose you call

this.Invoke(new MyDelegate(MyMethod));
this.Invoke(new MyDelegate(MyMethod2));

(assume not calling from owning thread so marshall occurs)

Is MyMethod *guaranteed* to finish execution before MyMethod2 starts?

Regards

--
Wal
http://www.vooose.com

*** Sent via Developersdex http://www.developersdex.com ***

[Jon Skeet [C# MVP]]

Yahoo <jo***************@yahoo.com> wrote:

If the mydelegate was async the method then it would kick off a new thread
and return. It could then do the same for the second line. Splitting hairs
here but the mydelegate method completed starting a new thread in a
different VM's sync. The threads that actually are carrying out the work in
different VM's are not dependent on eachother. They could be on different
machines.

Delegates themselves aren't synchronous or asynchronous - they're just
invoked in a synchronous or asynchronous way.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Jon Skeet [C# MVP]]

vooose <no****@microsoft.com> wrote:

Suppose you call

this.Invoke(new MyDelegate(MyMethod));
this.Invoke(new MyDelegate(MyMethod2));

(assume not calling from owning thread so marshall occurs)

Is MyMethod *guaranteed* to finish execution before MyMethod2 starts?

Well, you haven't said what "this" is - if it's a control, for
instance, then yes, MyMethod will definitely finish before Invoke
returns.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[vooose]

Thanks for your replies. "this" is a Control - I should have clarified
that initially. What about if you replace Invoke with BeginInvoke? I
realise this executes it async but since MyMethod was marshalled before
MyMethod2 shouldnt it always finish first as well (ie MyMethod gets hold
of the underlying window thread first ALWAYS)

Regards

--
Wal
http://www.vooose.com

*** Sent via Developersdex http://www.developersdex.com ***

[Richard Blewett [DevelopMentor]]

"vooose" <no****@microsoft.com> wrote in message
news:ey**************@tk2msftngp13.phx.gbl...

Thanks for your replies. "this" is a Control - I should have clarified
that initially. What about if you replace Invoke with BeginInvoke? I
realise this executes it async but since MyMethod was marshalled before
MyMethod2 shouldnt it always finish first as well (ie MyMethod gets hold
of the underlying window thread first ALWAYS)

Regards

--
Wal
http://www.vooose.com

*** Sent via Developersdex http://www.developersdex.com ***

I'm pretty sure it will using BeginInvoke - however I always feel a bit
uncomfortable about relying on this type of behavior. If you really want the
two methods to execute in Method1, Method2 order, use BeginInvoke on a
method that executes Method1 and Method2 synchronously. It will certainly
make youo intention clearer to anyone looking at the code.
Regards

Richard Blewett - DevelopMentor
http://www.dotnetconsult.co.uk/weblog
http://www.dotnetconsult.co.uk

[William Stacey [MVP]]

It is posting to a fifo queue so not sure under what circumstances it would
not work in order posted.

--
William Stacey [MVP]

"vooose" <no****@microsoft.com> wrote in message
news:ey**************@tk2msftngp13.phx.gbl...

Thanks for your replies. "this" is a Control - I should have clarified
that initially. What about if you replace Invoke with BeginInvoke? I
realise this executes it async but since MyMethod was marshalled before
MyMethod2 shouldnt it always finish first as well (ie MyMethod gets hold
of the underlying window thread first ALWAYS)

Regards

--
Wal
http://www.vooose.com

*** Sent via Developersdex http://www.developersdex.com ***