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Tony is this right?<BR>
<BR>
<BR>
conceptually:<BR>
<BR>
<BR>
result := CAS(VAR destination, compare, exchange)<BR>
<BR>
<BR>
old := destination<BR>
if old := compare then<BR>
destination = exchange<BR>
return old<BR>
<BR>
<BR>
bool result := CASP(VAR destination, compare, exchange)<BR>
P for predicate aka returning bool<BR>
<BR>
<BR>
old := destination<BR>
if old = compare then<BR>
destination := exchange<BR>
return true<BR>
return false<BR>
<BR>
<BR>
I'm pretty sure it is.<BR>
<BR>
<BR>
I'll have this for 16 bit and 32 bit values shortly, for now requiring<BR>
a recent Microsoft compiler and it generates function calls.<BR>
But inlining should be easy enough.<BR>
And then 8bit and 64bit.<BR>
<BR>
<BR>
Also this will probably not work on 386 or 486 but require Pentium or somesuch.<BR>
I don't know when various instructions were introduced but I know<BR>
386 is much poorer here than modern processors.<BR>
<BR>
<BR>
I assume only support int8, uint8, int16, uint16, int32, uint32, int64, uint64, size_t, ptrdiff_t<BR>
and not e.g. floating point.<BR>
<BR>
<BR>
- Jay<BR> </body>
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