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From: jb <jb.1234abcd@gmail.com>
Subject: Re: [RFC] how to get the size of a malloc(9) block ?
Date: Mon, 2 Dec 2013 12:36:11 +0000 (UTC)
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 <dt71 <at> gmx.com> writes:

> 
> So new flags could be [1]:
> - realloc_flags(p, s, REALLOCF_NO_MOVE)
> ...
> - realloc_flags(p, s, REALLOCF_NO_MOVE | REALLOCF_ELASTIC)
> ... 
> For this, there could be a REALLOCF_FORCE flag

In case of realloc_flags() failing the request, to avoid unnecessary
followups with regular realloc() when desired, we should include an option
like REALLOCF_FALLBACK_ANY that would allow to fallback on the regular
realloc() logic, in one call.

In addition, because I have an impression that realloc_flags() may have 
a future as a replacement for regular realloc() and we should aim for it,
we should include an option like REALLOCF_ANY for that purpose.

So far, the options could be as follows:
- realloc_flags(p, s, option)
  where option is one or a combination (where appropriate) of:
  REALLOCF_ANY                - default (move or no-move; regular realloc())
  REALLOCF_NO_MOVE            - no-move
  REALLOCF_ELASTIC            - combined with REALLOCF_NO_MOVE
  REALLOCF_FORCE              - combined with REALLOCF_NO_MOVE
  REALLOCF_FALLBACK_ANY       - combined with REALLOCF_NO_MOVE or its 
                                derivatives like REALLOCF_ELASTIC, etc

jb