[RFC] how to get the size of a malloc(9) block ?
jb
jb.1234abcd at gmail.com
Mon Dec 2 12:36:39 UTC 2013
<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
More information about the freebsd-current
mailing list