Commit 3bd261c

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Improve shm_mq portability around MAXIMUM_ALIGNOF and sizeof(Size).

Revise the original decision to expose a uint64-based interface and use Size everywhere possible. Avoid assuming that MAXIMUM_ALIGNOF is 8, or making any assumption about the relationship between that value and sizeof(Size). If MAXIMUM_ALIGNOF is bigger, we'll now insert padding after the length word; if it's smaller, we are now prepared to read and write the length word in chunks. Per discussion with Tom Lane.

1 parent 19f2d6c commit 3bd261cCopy full SHA for 3bd261c

2 files changed

+154

-101

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src
- backend/storage/ipc
  - shm_mq.c
- include/storage
  - shm_mq.h

2 files changed

+154

-101

lines changed

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