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Commitb1ce6c2

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Doc: clarify a critical and undocumented aspect of simplehash.h.
I just got burnt by trying to use pg_malloc instead of pg_malloc0with this. Save the next hacker some time by not leaving thisAPI detail undocumented.
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‎src/include/lib/simplehash.h

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@@ -41,7 +41,7 @@
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* - SH_SCOPE - in which scope (e.g. extern, static inline) do function
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*declarations reside
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* - SH_RAW_ALLOCATOR - if defined, memory contexts are not used; instead,
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* use this to allocate bytes
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* use this to allocate bytes. The allocator must zero the returned space.
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* - SH_USE_NONDEFAULT_ALLOCATOR - if defined no element allocator functions
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*are defined, so you can supply your own
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* The following parameters are only relevant when SH_DEFINE is defined:

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