Re: fine points of dynamic memory allocation, not 80286 protected mode

According to Tim Rentsch  <tr.17687@z991.linuxsc.com>:

Once there is a way to get additional memory from whatever underlying
environment is there, malloc() and free() can be implemented (and I
believe most often are implemented) without needing to compare
pointers.  Note:  pointers can be tested for equality without having
to compare them relationally, and testing pointers for equality is
well-defined between any two pointers (which may need to be converted
to 'void *' to avoid a type mismatch).

I suppose it's possible, but the versions I know keep free lists
and consolidate adjacent free chunks which requires comparing the
pointers.

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