Message8613

Author	zyasoft
Recipients	JonathanFeinberg, duffy151, fwierzbicki, irmen, santa4nt, zyasoft
Date	2014-06-09.17:24:00
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1402334640.45.0.504561129854.issue1949@psf.upfronthosting.co.za>
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Santoso, we actually do just that. So dict and set are backed by ConcurrentHashMap, taking advantage of weakly consistent iteration to match CPython semantics; likewise one of the major fixes for 2.5.0 in its beta cycle was for list, see #1026. The concurrency chapter I wrote for the Jython book is a good place to start, especially these sections: * http://www.jython.org/jythonbook/en/1.0/Concurrency.html#thread-safety * http://www.jython.org/jythonbook/en/1.0/Concurrency.html#atomic-operations The fact that the GIL imposes a memory model is quite relevant to what it actually is supposed to do.

Santoso, we actually do just that. So dict and set are backed by ConcurrentHashMap, taking advantage of weakly consistent iteration to match CPython semantics; likewise one of the major fixes for 2.5.0 in its beta cycle was for list, see #1026.

The concurrency chapter I wrote for the Jython book is a good place to start, especially these sections:

* http://www.jython.org/jythonbook/en/1.0/Concurrency.html#thread-safety
* http://www.jython.org/jythonbook/en/1.0/Concurrency.html#atomic-operations

The fact that the GIL imposes a memory model is quite relevant to what it actually is supposed to do.

History
Date	User	Action	Args
2014-06-09 17:24:00	zyasoft	set	messageid: <1402334640.45.0.504561129854.issue1949@psf.upfronthosting.co.za>
2014-06-09 17:24:00	zyasoft	set	recipients: + zyasoft, fwierzbicki, irmen, JonathanFeinberg, duffy151, santa4nt
2014-06-09 17:24:00	zyasoft	link	issue1949 messages
2014-06-09 17:24:00	zyasoft	create