Use InterlockedExchangeAdd varient instead of InterlockedAdd which doesn't seem to be available on …

Use InterlockedExchangeAdd varient instead of InterlockedAdd which doesn't seem to be available on some windows platforms.

R=rmacnak@google.com

Committed: https://github.com/dart-lang/sdk/commit/eece23fe67a9995b65d9def47cdbb8575a6819e8

[siva, 2016-01-30 00:59:39]

asiva@google.com changed reviewers:
+ rmacnak@google.com

[rmacnak, 2016-01-30 01:04:21]

lgtm

https://codereview.chromium.org/1644393003/diff/20001/runtime/vm/atomic_win.h
File runtime/vm/atomic_win.h (right):

https://codereview.chromium.org/1644393003/diff/20001/runtime/vm/atomic_win.h...
runtime/vm/atomic_win.h:31: inline uintptr_t
AtomicOperations::FetchAndIncrementBy(intptr_t* p,
Since this changes the (as yet unused) return value, consider making these void.

[siva, 2016-01-30 01:07:26]

https://codereview.chromium.org/1644393003/diff/20001/runtime/vm/atomic_win.h
File runtime/vm/atomic_win.h (right):

https://codereview.chromium.org/1644393003/diff/20001/runtime/vm/atomic_win.h...
runtime/vm/atomic_win.h:31: inline uintptr_t
AtomicOperations::FetchAndIncrementBy(intptr_t* p,
On 2016/01/30 01:04:20, rmacnak wrote:
> Since this changes the (as yet unused) return value, consider making these
void.

Will fix in a new CL.

[siva, 2016-01-30 01:09:06]

Description was changed from

==========
Use InterlockedExchangeAdd varient instead of InterlockedAdd which doesn't seem
to be available on some windows platforms.
==========

to

==========
Use InterlockedExchangeAdd varient instead of InterlockedAdd which doesn't seem
to be available on some windows platforms.

R=rmacnak@google.com

Committed:
https://github.com/dart-lang/sdk/commit/eece23fe67a9995b65d9def47cdbb8575a6819e8
==========

[siva, 2016-01-30 01:09:07]

Committed patchset #2 (id:20001) manually as
eece23fe67a9995b65d9def47cdbb8575a6819e8 (presubmit successful).