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Update IsAPIContractVxAvailable to be multi thread safe. #6665

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Feb 1, 2022
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Update IsAPIContractVxAvailable to be multi thread safe. #6665

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2 changes: 1 addition & 1 deletion dev/dll/SharedHelpers.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -223,11 +223,11 @@ template <uint16_t APIVersion> bool SharedHelpers::IsAPIContractVxAvailable()
static bool isAPIContractVxAvailable = false;
if (!isAPIContractVxAvailableInitialized)
{
isAPIContractVxAvailableInitialized = true;
// The CBS package is only ever used as a part of the Windows build. Therefore, we can assume that
// all API contracts are present since we can never be running these binaries on a windows build
// that does not match the windows sdk these binaries were compiled against.
isAPIContractVxAvailable = IsInCBSPackage() ? true : winrt::ApiInformation::IsApiContractPresent(L"Windows.Foundation.UniversalApiContract", APIVersion);
isAPIContractVxAvailableInitialized = true;
}

return isAPIContractVxAvailable;
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