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bpo-35813: Added shared_memory submodule of multiprocessing. #11664

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merged 8 commits into from
Feb 2, 2019
Merged

bpo-35813: Added shared_memory submodule of multiprocessing. #11664

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90f4a6c
Added shared_memory submodule of multiprocessing.
applio Jan 23, 2019
fa42acf
Fixed as yet unsupported expression, added news entry.
applio Jan 24, 2019
fdb694c
Formatting tweaks.
applio Jan 24, 2019
9cbdac8
Removed unfavored alt_shareable_wrap approach, cleaned up debug loggi…
applio Jan 24, 2019
a1070ac
Fixed missing library dependency on linux and bsd systems other than …
applio Feb 1, 2019
fac0895
Fixed whitespace.
applio Feb 1, 2019
c2ef47d
Added missing __all__, ensured SharedMemoryManager uses parameterized…
applio Feb 1, 2019
516cf4a
Adjust for build on OpenBSD and others.
applio Feb 2, 2019
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Fixed as yet unsupported expression, added news entry.
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@applio
applio committed Jan 24, 2019
commit fa42acf4c77af10ec8761f3a93e69aebbb019dff
14 changes: 7 additions & 7 deletions Lib/multiprocessing/shared_memory.py
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Original file line number Diff line number Diff line change
Expand Up @@ -97,14 +97,14 @@ def shareable_wrap(
type(existing_obj)
)

agg = existing_obj.itemsize
size = [ agg := i * agg for i in existing_obj.shape ][-1]
#agg = existing_obj.itemsize
#size = [ agg := i * agg for i in existing_obj.shape ][-1]
# TODO: replace use of reduce below with above 2 lines once available
#size = reduce(
# lambda x, y: x * y,
# existing_obj.shape,
# existing_obj.itemsize
#)
size = reduce(
lambda x, y: x * y,
existing_obj.shape,
existing_obj.itemsize
)

else:
assert shmem_name is not None
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2019-01-23-22-44-37.bpo-35813.Yobj-Y.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Shared memory submodule added to multiprocessing to avoid need for
serialization between processes