Davin Potts <pyt...@discontinuity.net> added the comment:
The simpler API is now implemented in GH-11816 as discussed previously.
Notably:
> * We go with this simpler API: SharedMemory(name=None, create=False, size=0)
> * 'size' is ignored when create=False
> * create=True acts like O_CREX and create=False only attaches to existing
> shared memory blocks
As part of this change, the PosixSharedMemory and WindowsNamedSharedMemory
classes are no more; they have been consolidated into the SharedMemory class
with a single, simpler, consistent-across-platforms API.
On the SharedMemory class, 'size' is now stored by the __init__ and does not
use fstat() as part of its property.
Also, SharedMemoryManager (and its close friends) has been relocated to the
multiprocessing.managers submodule, matching the organization @Giampaolo
outlined previously:
multiprocessing.managers.SharedMemoryManager
multiprocessing.managers._SharedMemoryTracker
multiprocessing.managers.SharedMemoryServer (not documented)
multiprocessing.shared_memory.SharedMemory
multiprocessing.shared_memory.SharedList
multiprocessing.shared_memory.WindowsNamedSharedMemory (REMOVED)
multiprocessing.shared_memory.PosixSharedMemory (REMOVED)
I believe this addresses all of the significant discussion topics in a way that
brings together all of the excellent points being made. Apologies if I have
missed something -- I did not think so but I will go back through all of the
discussions tomorrow to double-check.
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<https://bugs.python.org/issue35813>
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