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This has been brought up a couple times now. I don't believe anyone
has voiced strong objection to having a variant which directly takes
pointers, but no one has proposed a patch either. <br>
<br>
p.s. I'm solidly in the "it would be nice to see" camp. For much
the same reasons as David. <br>
<br>
Philip<br>
<br>
<div class="moz-cite-prefix">On 09/06/2014 02:31 PM, Chuan Qiu
wrote:<br>
</div>
<blockquote
cite="mid:CAARSEj=SSY4q-g0NLo_a1CAo8K6MX2NC_=pMkXPijL4osp_==w@mail.gmail.com"
type="cite">
<div dir="ltr"><span
style="font-family:arial,sans-serif;font-size:11px">cmpxchg
only support exchange on int operands, but pointer values can
be very useful here, e.g. stack<T> in a linked-list, the
top can be atomic<Node<T>*>. </span>
<div style="font-family:arial,sans-serif;font-size:11px">in
clang++, cmpxchg operations on atomic<T*> are bitcasted
i64 and do the operation, which is ugly.</div>
<div style="font-family:arial,sans-serif;font-size:11px"><br>
</div>
<div style="font-family:arial,sans-serif;font-size:11px">Any
reason or concern why cmpxchg doesn't support pointer
operands?</div>
<div style="font-family:arial,sans-serif;font-size:11px"><br>
</div>
<div style="font-family:arial,sans-serif;font-size:11px">Thanks</div>
</div>
<br>
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</blockquote>
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