[Stackless] Problems with Queues in Microthread Lib.

[Bernd Rinn]

On Fri, Mar 16, 2001 at 07:25:17AM -0800, James Turner wrote:
> Hi all,
> 
> For some strange reason I can\'t figure out to make
> queues work correctly for me.  This is the code I\'m
> testing with:
> [...]
> Ack!  I thought at first that get() was just not 
> blocking for me, but now it appears that it\'s quitting
> the microthread entirely for some reason!  
> 
> If it\'s any help at all, mqueue.cget() will read None
> and the microthread will carry out its normal lifespan.

I can confirm the bug is present with Python 2.0.42-S1.2.22 on Linux2.

When

request_queue.put(1)
request_queue.put(2)

is added _before_ uthread.run() is called, everything seems OK. If the
put's are given _after_ uthread.run(), I get the error

==================================================================
~/tmp $ python ttt.py 
Somehow I get here...
Somehow I get here...
Traceback (most recent call last):
  File "ttt.py", line 15, in ?
    request_queue.put(1)
  File "/usr/lib/python2.0/uthread.py", line 470, in put
    atomic(self.__put, x)
  File "/usr/lib/python2.0/uthread.py", line 169, in atomic
    return apply(func, args, kwargs)
  File "/usr/lib/python2.0/uthread.py", line 474, in __put
    self.notify()
  File "/usr/lib/python2.0/uthread.py", line 257, in notify
    atomic(self.__notify)
  File "/usr/lib/python2.0/uthread.py", line 169, in atomic
    return apply(func, args, kwargs)
  File "/usr/lib/python2.0/uthread.py", line 262, in __notify
    th.start()
  File "/usr/lib/python2.0/uthread.py", line 687, in start
    atomic(self.__start, task, scheduler)
  File "/usr/lib/python2.0/uthread.py", line 169, in atomic
    return apply(func, args, kwargs)
  File "/usr/lib/python2.0/uthread.py", line 697, in __start
    raise UThreadError, ERR_THREAD_DEAD
uthread.UThreadError: Can't restart a finished thread.
==================================================================

Regards,

Bernd
-- 
Bernd Rinn
Fakultät für Physik
Universität Konstanz

Tel. 07531/88-3812, 
e-mail: Bernd.Rinn at uni-konstanz.de
PGP-Fingerprint: 1F AC 31 64 FF EF A9 67  6E 0D 4C 26 0B E7 ED 5C
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