2018-03-18 10:27 GMT-07:00 Jan Mercl <0xj...@gmail.com>:
> On Sun, Mar 18, 2018 at 6:21 PM Devon H. O'Dell <devon.od...@gmail.com>
> wrote:
>
>> * There is no way to force at least 16 byte alignment of data per the
> language spec, so there is no way to implement DCAS (notably missing
> from sync/atomic) on amd64 (cmpxchg16b requires 16 byte alignment of
> its target operand).
>
> https://golang.org/ref/spec#Size_and_alignment_guarantees
I don't think implementing things in terms of complex128 and using
unsafe.Pointer to convert e.g.
type stackForAlignment struct {
header complex128
}
to
type Stack struct {
head *node
gen uint64
}
is anybody's idea of a good idea. But well received, I guess it is possible.
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