Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #39165

Re: Thread and synchonized question

Show all headers | View raw

Den måndag 30 september 2019 kl. 12:10:52 UTC+2 skrev Andreas Leitgeb:
> mike <mikaelpetterson@hotmail.com> wrote:
> > We have class A with method synchronized connect(int) that calls
> > class B that has synchronized connect() (main thread)
> > I guess the lock will be on class A?
> 
> There are some relevant details missing, so there are two options:
> A) either or both of the methods are static, or there are two objects
>      one of A and one of B that you call the method on: then the locks
>      are independent, and main thread just hold both.
> B) One of the methods is just a superclass method, and both "synchronize"s
>      address the same object, and the main thread holds that one twice.
> 
> > What if class B and synchronized connect()is called by another
> > thread ( reconnect thread) I guess lock is on class B.
> 
> > So does this mean that both main and reconnect threads can access
> > the synchronized connect() on class B?
> 
> That can be pretty surely excluded in either of the above cases.

Hi Andreas,

Thx for replying and helping out to clarify.

Yes I missed to add the information that there are two objects A and B that you call the method on. 

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Thread and synchonized question mike <mikaelpetterson@hotmail.com> - 2019-09-30 00:32 -0700
  Re: Thread and synchonized question Andreas Leitgeb <avl@logic.at> - 2019-09-30 10:10 +0000
    Re: Thread and synchonized question mike <mikaelpetterson@hotmail.com> - 2019-09-30 04:38 -0700
      Re: Thread and synchonized question Andreas Leitgeb <avl@logic.at> - 2019-09-30 13:48 +0000
  Re: Thread and synchonized question Eric Sosman <esosman@comcast-dot-net.invalid> - 2019-09-30 17:07 -0400
  Re: Thread and synchonized question Arne Vajhøj <arne@vajhoej.dk> - 2019-09-30 19:48 -0400

csiph-web