Initial public release of nearby library

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I85d490e448375aa4eb7b09680757c02fff1420b4

cpp/platform/impl/default/default_platform.cc

@@ -0,0 +1,31 @@
+// 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.
+
+#include "platform/impl/default/default_platform.h"
+
+#include "platform/impl/default/default_condition_variable.h"
+#include "platform/impl/default/default_lock.h"
+
+namespace location {
+namespace nearby {
+
+Ptr<Lock> DefaultPlatform::createLock() { return MakePtr(new DefaultLock()); }
+
+Ptr<ConditionVariable> DefaultPlatform::createConditionVariable(
+    Ptr<Lock> lock) {
+  return MakePtr(new DefaultConditionVariable(DowncastPtr<DefaultLock>(lock)));
+}
+
+}  // namespace nearby
+}  // namespace location