Re: [Django] #23642: LocMemCache.incr is not thread safe

[Django]

#23642: LocMemCache.incr is not thread safe
-+
 Reporter:  tchaumeny|Owner:  nobody
 Type:  Bug  |   Status:  closed
Component:  Core (Cache system)  |  Version:  master
 Severity:  Normal   |   Resolution:  fixed
 Keywords:   | Triage Stage:  Accepted
Has patch:  1|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+
Changes (by Loic Bistuer ):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 In [changeset:"6448dd833524ac3fc503506b624841c9d642de8a"]:
 {{{
 #!CommitTicketReference repository=""
 revision="6448dd833524ac3fc503506b624841c9d642de8a"
 Fixed #23642 -- Made LocMemCache.incr() thread-safe as documented
 }}}

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Ticket URL: 
Django 
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Re: [Django] #23642: LocMemCache.incr is not thread safe

[Django]

#23642: LocMemCache.incr is not thread safe
-+
 Reporter:  tchaumeny|Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Core (Cache system)  |  Version:  master
 Severity:  Normal   |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+
Changes (by loic):

 * stage:  Unreviewed => Accepted


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Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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[Django] #23642: LocMemCache.incr is not thread safe

[Django]

#23642: LocMemCache.incr is not thread safe
-+
 Reporter:  tchaumeny|  Owner:  nobody
 Type:  Bug  | Status:  new
Component:  Core (Cache system)  |Version:  master
 Severity:  Normal   |   Keywords:
 Triage Stage:  Unreviewed   |  Has patch:  0
Easy pickings:  0|  UI/UX:  0
-+
 `LocMemCache` is documented as being thread-safe, but its `incr` operation
 isn't: there is not lock wrapping the whole get+set operation.

 The code below demonstrates the issue:

 {{{
 import threading

 from django.core.cache.backends.locmem import LocMemCache

 cache = LocMemCache('test', {})

 cache.set('foo', 0)

 def increment(key):
 cache.incr(key)

 threads = []
 for i in range(20):
 t = threading.Thread(target=increment, args=('foo',))
 t.start()
 threads.append(t)

 for t in threads:
 t.join()

 print cache.get('foo')   # Random results — 20 is expected
 }}}

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Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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