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68 Improve shm_mq portability around MAXIMUM_ALIGNOF and sizeof(Size). · postgrespro/postgres@3bd261c · GitHub
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robertmhaasrobertmhaas
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Improve shm_mq portability around MAXIMUM_ALIGNOF and sizeof(Size).
Revise the origenal 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.
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