[musl] Re: realloci(): A realloc() variant that works in-place

[Collin Funk]

Rich Felker <dalias@libc.org> writes:

>> Where realloci() allocates at least 'size' bytes (but possibly more),
>> and returns the actual usable size of the block.  So, you could
>> 
>> 		realloci(p, 3000);
>> 
>> and it would return for example 4096, which would be the usable size of
>> the block.  Or it would return -1 if it is unable to grow that much.
>> realloci() would never fail when shrinking, as it could just return a
>> larger size and be done with it.
>
> ssize_t is POSIX-only and unlikely to be adopted by C standard. It
> could return (size_t)-1 instead.

ptrdiff_t probably makes more sense for allocation sizes anyways.

Collin