Internal change

PiperOrigin-RevId: 368537620

cpp/platform/impl/windows/settable_future.h

@@ -0,0 +1,51 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef PLATFORM_IMPL_WINDOWS_SETTABLE_FUTURE_H_
+#define PLATFORM_IMPL_WINDOWS_SETTABLE_FUTURE_H_
+
+#include "platform/api/settable_future.h"
+
+namespace location {
+namespace nearby {
+namespace windows {
+
+// A SettableFuture is a type of Future whose result can be set.
+//
+// https://google.github.io/guava/releases/20.0/api/docs/com/google/common/util/concurrent/SettableFuture.html
+template <typename T>
+class SettableFuture : public api::SettableFuture<T> {
+ public:
+  // TODO(b/184975123): replace with real implementation.
+  ~SettableFuture() override = default;
+
+  // Completes the future successfully. The value is returned to any waiters.
+  // Returns true, if value was set.
+  // Returns false, if Future is already in "done" state.
+  // TODO(b/184975123): replace with real implementation.
+  bool Set(T value) override { return false; }
+
+  // Completes the future unsuccessfully. The exception value is returned to any
+  // waiters.
+  // Returns true, if exception was set.
+  // Returns false, if Future is already in "done" state.
+  // TODO(b/184975123): replace with real implementation.
+  bool SetException(Exception exception) override { return false; }
+};
+
+}  // namespace windows
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_IMPL_WINDOWS_SETTABLE_FUTURE_H_