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Issue #21565: multiprocessing: use contex-manager protocol for synchronization

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primitives.
This commit is contained in:
Charles-François Natali 2014-05-25 14:12:12 +01:00
parent 1691e35953
commit a924fc7abc
9 changed files with 43 additions and 102 deletions
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7
Lib/multiprocessing/heap.py
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@ -216,9 +216,8 @@ class Heap(object):
assert 0 <= size < sys.maxsize
if os.getpid() != self._lastpid:
self.__init__() # reinitialize after fork
self._lock.acquire()
self._free_pending_blocks()
try:
with self._lock:
self._free_pending_blocks()
size = self._roundup(max(size,1), self._alignment)
(arena, start, stop) = self._malloc(size)
new_stop = start + size
@ -227,8 +226,6 @@ class Heap(object):
block = (arena, start, new_stop)
self._allocated_blocks.add(block)
return block
finally:
self._lock.release()
#
# Class representing a chunk of an mmap -- can be inherited by child process