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[1.2.X] Fixed #13488 -- No longer generate unhandled exceptions that may occur when destructors of global GEOS I/O objects are called on process termination. 

Backport of r15378 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15379 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Justin Bronn 2011-01-31 20:12:23 +00:00
parent 776bf6e5f7
commit 432ff76035
1 changed files with 9 additions and 13 deletions
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22
django/contrib/gis/geos/prototypes/threadsafe.py
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@ -20,18 +20,6 @@ class GEOSContext(threading.local):
thread_context = GEOSContext()
def call_geos_threaded(cfunc, args):
"""
This module-level routine calls the specified GEOS C thread-safe
function with the context for this current thread.
"""
# If a context handle does not exist for this thread, initialize one.
if not thread_context.handle:
thread_context.handle = GEOSContextHandle()
# Call the threaded GEOS routine with pointer of the context handle
# as the first argument.
return cfunc(thread_context.handle.ptr, *args)
class GEOSFunc(object):
"""
Class that serves as a wrapper for GEOS C Functions, and will
@ -43,6 +31,9 @@ class GEOSFunc(object):
# take an additional context handle parameter.
self.cfunc = getattr(lgeos, func_name + '_r')
self.threaded = True
# Create a reference here to thread_context so it's not
# garbage-collected before an attempt to call this object.
self.thread_context = thread_context
except AttributeError:
# Otherwise, use usual function.
self.cfunc = getattr(lgeos, func_name)
@ -50,7 +41,12 @@ class GEOSFunc(object):
def __call__(self, *args):
if self.threaded:
return call_geos_threaded(self.cfunc, args)
# If a context handle does not exist for this thread, initialize one.
if not self.thread_context.handle:
self.thread_context.handle = GEOSContextHandle()
# Call the threaded GEOS routine with pointer of the context handle
# as the first argument.
return self.cfunc(self.thread_context.handle.ptr, *args)
else:
return self.cfunc(*args)