🚀 go-pugleaf

On 3 Oct 90 07:07:00 GMT, griffith@eecs.cs.pdx.edu (Michael Griffith) said:

Michael> Yes, but if you are not guaranteed a granularity of at least
Michael> 2 bytes when you request memory from AllocMem() then many
Michael> programs would break, because chip memory accessed by the
Michael> custom chips must have their addresses be word orientated.
Michael> Although the documentation "implies" that Allocate() and
Michael> Deallocate() work on 8-bit boundaries, you are guaranteed at
Michael> least longword alignment accord to the 1.2 Exec Manual (p.
Michael> 66). And in fact, given the context, you can take this to
Michael> apply to AllocMem() and FreeMem() as well, although I'm not
Michael> sure if this is the case.

AllocMem() *is* guaranteed to return longword-aligned memory.  That
is, you can absolutely depend on AllocMem() returning blocks which are
multiples of 4 bytes, but you can't depend on the current granularity
of 8 bytes, since it may change in the future.

Michael> As for what is and isn't considered bad style, well, you do
Michael> what you have to. If you can make it nice, good. If you
Michael> can't, at least make it work.

But make it work in the future too, if possible.  (and it usually is.)

Deven
-- 
Deven T. Corzine        Internet:  deven@rpi.edu, shadow@pawl.rpi.edu
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