using System.Runtime.InteropServices; using System.Threading; namespace System.Runtime.CompilerServices { [StructLayout(LayoutKind.Auto)] [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] public struct AsyncIteratorMethodBuilder { private AsyncTaskMethodBuilder _methodBuilder; private object _id; internal object ObjectIdForDebugger => _id ?? Interlocked.CompareExchange(ref _id, new object(), null) ?? _id; public static AsyncIteratorMethodBuilder Create() { AsyncIteratorMethodBuilder result = default(AsyncIteratorMethodBuilder); result._methodBuilder = AsyncTaskMethodBuilder.Create(); return result; } [MethodImpl(MethodImplOptions.AggressiveInlining)] public void MoveNext<[System.Runtime.CompilerServices.Nullable(0)] TStateMachine>(ref TStateMachine stateMachine) where TStateMachine : IAsyncStateMachine { _methodBuilder.Start(ref stateMachine); } public void AwaitOnCompleted<[System.Runtime.CompilerServices.Nullable(0)] TAwaiter, [System.Runtime.CompilerServices.Nullable(0)] TStateMachine>(ref TAwaiter awaiter, ref TStateMachine stateMachine) where TAwaiter : INotifyCompletion where TStateMachine : IAsyncStateMachine { _methodBuilder.AwaitOnCompleted(ref awaiter, ref stateMachine); } public void AwaitUnsafeOnCompleted<[System.Runtime.CompilerServices.Nullable(0)] TAwaiter, [System.Runtime.CompilerServices.Nullable(0)] TStateMachine>(ref TAwaiter awaiter, ref TStateMachine stateMachine) where TAwaiter : ICriticalNotifyCompletion where TStateMachine : IAsyncStateMachine { _methodBuilder.AwaitUnsafeOnCompleted(ref awaiter, ref stateMachine); } public void Complete() { _methodBuilder.SetResult(); } } }