[Patches] [ python-Patches-1123430 ] Python memory allocator: Free memory

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Patches item #1123430, was opened at 2005-02-15 16:27
Message generated for change (Comment added) made by vulturex
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Category: Core (C code)
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Submitted By: Evan Jones (vulturex)
Assigned to: Nobody/Anonymous (nobody)
Summary: Python memory allocator: Free memory

Initial Comment:
This is the second version of my Python memory allocator patch. 
The first version was discussed on the python-dev mailing list 
here:

http://mail.python.org/pipermail/python-dev/2005-January/
051255.html

This patch enables Python to actually return memory to the 
system. The current version's memory usage will only grow. This 
version maintains the same backwards compatability guarantees 
as the previous version: Calling PyObject_Free with a pointer that 
was returned by malloc() while NOT holding the GIL will work, and 
will not corrupt the state of the memory allocator.

The patch modifies obmalloc.c. If it is accepted, other 
modifications to that file are required. In particular, I have not yet 
updated the WITH_MEMORY_LIMITS implementation, nor have I 
looked closely at the PYMALLOC_DEBUG code to see what changes 
(if any) are required.


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>Comment By: Evan Jones (vulturex)
Date: 2005-05-10 00:31

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Whoops! I uploaded a "fixed" version a while ago, but I guess I didn't 
update the comments. The patch currently attached to this is the most up-
to-date version. Sorry about that.

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Comment By: Evan Jones (vulturex)
Date: 2005-02-19 09:07

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As per the discussion on python-dev, I've removed the concurrency hack. 
The routines in obmalloc.c now *must* be called while holding the GIL, 
even if the pointer was allocated with malloc(). I also finally fixed the 
PYMALLOC_DEBUG routines, so I believe this patch is now "complete."

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Comment By: Evan Jones (vulturex)
Date: 2005-02-18 17:08

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Please ignore this patch for the moment: I'm in the process of making 
some fixes.

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