Re: thread: catch the current thread in a share object

Eric Sosman <esosman@comcast-dot-net.invalid>
Sat, 26 Jul 2014 14:19:45 -0400
On 7/26/2014 12:20 PM, Bert_emme wrote:

I try to implement a share object between thread. In the share object there is a queue. I want that if a condition is realizated the thread that at the moment lock the object go in wait and I want to put it in the queue of the shared object. But I don't idea on how referencing to this thread.

class ObjShare{
     Queue q;

     public synchronized mymethod(){


     See markspace's response. Also, this use of wait() is certainly
wrong, for at least two reasons:

     1) It won't compile: wait() is an instance method of Object,
        and you must apply it to some kind of Object reference.
        Perhaps you meant this.wait().

     2) wait() will re-aquire its Object's lock and return after
        some other thread calls notify() or notifyAll() on that
        Object, *or* at any random moment for no reason at all.
        The fact that wait() returns says *nothing* about whether
        the reasons for waiting no longer apply. That's why a
        wait() call should (nearly always) be inside a synchronized
        loop that re-tests the condition after awakening.

     Again: See markspace's response, with particular attention to
the phrase "not good design." You are almost certainly doing
something you'll eventually regret.


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