Re: Newbie missed the last line of thread::join()

From: Mark Sizer (yg-boost-users_at_[hidden])
Date: 2003-06-06 17:50:29

No problem. I just converted some old threading code to Boost with the 
help of the list. I'm glad to be able to free Mr. Kempf for more arcane 
discussions :)

- Mark

Dick Bridges wrote:

> I'm afraid this thread was started by one of my "senior moments".  When
> reading ~thread() and join(), I flipped a bit and "saw" join() handled
> m_joinable == true and ~thread() handled m_joinable == false.  THAT's why I
> thought join() had to be called.  Your post caused me to go back and read it
> again.  Now I'm *REALLY* embarrassed.
> 
> Thanks for getting me started down the right track.
> 
> "Mark Sizer" <yg-boost-users_at_[hidden]> wrote in message
> news:3EDE8F0A.1090003_at_15grant.com...
> 
>>What is "the right thing"?
>>
>>You don't HAVE to join(). The creating thread will just keep going if
>>you don't. If you join, it waits.
>>
>>If you're passing ownership (e.g. delete responsibility) across thread
>>boundaries, you have to be careful, but that doesn't have much to do
>>with join().
>>
>>After starting the thread, you can use a condtional in the creator to
>>wait for the thread to "get going" and accept ownership, sort of a
>>"started()" rather than an "ended()", like join(). Or you can flip it
>>around and have the started thread wait on the conditional whilst the
>>creator thread continues to use what will eventually be given to the
>>
> thread.
> 
>>Is that at all helpful?
>>
>>- Mark
>>
>>dick.bridges_at_[hidden] wrote:
>>
>>
>>>I need to spawn worker threads that simply perform a task and exit.  All
>>>the examples I can find seem to use join() to cleanup the thread
>>>
> resources
> 
>>>from another thread.  Isn't there some way to declare worker threads so
>>>that they "do the right thing" as they exit the thread function?
>>>
>>>TIA
>>>
>>>
>>>
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>>>
>>
>>
>>
>>
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