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Doc: clarify a critical and undocumented aspect of simplehash.h.

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I just got burnt by trying to use pg_malloc instead of pg_malloc0
with this.  Save the next hacker some time by not leaving this
API detail undocumented.
This commit is contained in:
Tom Lane 2021-10-21 17:08:53 -04:00
parent 0c04342b1d
commit b1ce6c2843
1 changed files with 1 additions and 1 deletions
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src/include/lib/simplehash.h
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@ -41,7 +41,7 @@
* - SH_SCOPE - in which scope (e.g. extern, static inline) do function
* declarations reside
* - SH_RAW_ALLOCATOR - if defined, memory contexts are not used; instead,
* use this to allocate bytes
* use this to allocate bytes. The allocator must zero the returned space.
* - SH_USE_NONDEFAULT_ALLOCATOR - if defined no element allocator functions
* are defined, so you can supply your own
* The following parameters are only relevant when SH_DEFINE is defined: