Martin v. Löwis wrote:
Nick Coghlan wrote:
Do we want to add a released context manager to the threading module for
2.5?
I don't think that should be added. I would consider it a dangerous
programming style: if the lock merely doesn't need to be held (i.e.
if it isn't necessary, but
On 4/23/06, Martin v. Löwis [EMAIL PROTECTED] wrote:
Nick Coghlan wrote:
Do we want to add a released context manager to the threading module for
2.5?
I don't think that should be added. I would consider it a dangerous
programming style: if the lock merely doesn't need to be held (i.e.
if
[Guido]
Actually, what Nick describes is *exactly* how one should write code
using a condition variable:
LOCK
while nothing to do:
UNLOCK
wait for the condition variable (or sleep, or whatever)
LOCK
# here we have something to do with the lock held
remove the
Guido van Rossum wrote:
Actually, what Nick describes is *exactly* how one should write code
using a condition variable:
LOCK
while nothing to do:
UNLOCK
wait for the condition variable (or sleep, or whatever)
LOCK
# here we have something to do with the lock held
Tim Peters wrote:
Does
with cv:
work to replace the outer (== only) acquire/try/finally/release dance?
Indeed it does - although implemented in a somewhat convoluted way:
A lock *is* a context (or is that context manager), i.e. it implements
def __context__(self): return self
On 4/24/06, Martin v. Löwis [EMAIL PROTECTED] wrote:
Tim Peters wrote:
Does
with cv:
work to replace the outer (== only) acquire/try/finally/release dance?
Indeed it does - although implemented in a somewhat convoluted way:
A lock *is* a context (or is that context manager), i.e.
Guido van Rossum wrote:
Tim is right, the UNLOCK/LOCK part is implied in the wait() call.
However, the wait() implementation really *does* provide a use case
for the primitive operation that Nick proposed, and it can't be
refactored to remove the pattern Martin disapproves of (though of
Do we want to add a released context manager to the threading module for
2.5? It was mentioned using the name unlocked in PEP 343, but never spelt out:
class released(object):
def __init__(self, lock):
self.lock = lock
def __enter__(self):
self.lock.release()
def
