16f163157a
This fixes flutter engine test failure on Windows where it complained about invalid load memory order for failure branch(default=acq_rel) for this operation. acq_rel is not allowed for failed comparison test memory order(per https://en.cppreference.com/w/cpp/atomic/atomic/compare_exchange) TEST=flutter/engine runtime_unittests on Windows Change-Id: I59dd3aed04f483b2e2a82721e337b78b8e3190d3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/175101 Reviewed-by: Ryan Macnak <rmacnak@google.com> Reviewed-by: Alexander Aprelev <aam@google.com> Commit-Queue: Alexander Aprelev <aam@google.com>