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Avoid using intrinsics in Windows.Foundation.ixx #1649

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Avoid using intrinsics in Windows.Foundation.ixx #1649

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7 changes: 7 additions & 0 deletions strings/base_coroutine_foundation.h
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Original file line number Diff line number Diff line change
Expand Up @@ -895,7 +895,14 @@ WINRT_EXPORT namespace winrt
{
auto sender_abi = *(impl::unknown_abi**)&sender;


#if defined(__cpp_lib_atomic_ref) && __cpp_lib_atomic_ref >= 201806L
void* expected = nullptr;
std::atomic_ref<void*> ref{ *reinterpret_cast<void**>(&result) };
if (ref.compare_exchange_strong(expected, static_cast<void*>(sender_abi)))
#else
if (nullptr == _InterlockedCompareExchangePointer(reinterpret_cast<void**>(&result), sender_abi, nullptr))
#endif
{
sender_abi->AddRef();
status = operation_status;
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8 changes: 8 additions & 0 deletions test/test_cpp20_module/coroutines.cpp
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Expand Up @@ -56,3 +56,11 @@ TEST_CASE("module_async_cancel")
op.Cancel();
REQUIRE(op.Status() == AsyncStatus::Canceled);
}

TEST_CASE("module_async_when_any")
{
auto a = do_nothing_async();
auto b = do_nothing_async();
auto c = winrt::when_any(a, b);
c.get();
}