Internal change

PiperOrigin-RevId: 368537620

cpp/platform/impl/windows/count_down_latch.h

@@ -0,0 +1,47 @@
+// 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_COUNT_DOWN_LATCH_H_
+#define PLATFORM_IMPL_WINDOWS_COUNT_DOWN_LATCH_H_
+
+#include "platform/api/count_down_latch.h"
+
+namespace location {
+namespace nearby {
+namespace windows {
+
+// A synchronization aid that allows one or more threads to wait until a set of
+// operations being performed in other threads completes.
+//
+// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CountDownLatch.html
+class CountDownLatch : public api::CountDownLatch {
+ public:
+  // TODO(b/184975123): replace with real implementation.
+  ~CountDownLatch() override = default;
+
+  // TODO(b/184975123): replace with real implementation.
+  Exception Await() override { return Exception{}; }
+  // TODO(b/184975123): replace with real implementation.
+  ExceptionOr<bool> Await(absl::Duration timeout) override {
+    return Exception{};
+  }
+  // TODO(b/184975123): replace with real implementation.
+  void CountDown() override{};
+};
+
+}  // namespace windows
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_IMPL_WINDOWS_COUNT_DOWN_LATCH_H_