Initial public release of nearby library

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

cpp/core/internal/loop_runner.cc

@@ -0,0 +1,68 @@
+// 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 "core/internal/loop_runner.h"
+
+#include "platform/exception.h"
+
+namespace location {
+namespace nearby {
+namespace connections {
+
+LoopRunner::LoopRunner(const std::string& name) : name_(name) {}
+
+bool LoopRunner::loop(Ptr<Callable<bool> > callable) {
+  ScopedPtr<Ptr<Callable<bool> > > scoped_callable(callable);
+
+  onEnterLoop();
+  while (true) {
+    onEnterIteration();
+    ExceptionOr<bool> should_continue = scoped_callable->call();
+    if (!should_continue.ok()) {
+      onExceptionExitLoop(should_continue.exception());
+      break;
+    }
+
+    onExitIteration();
+    if (!should_continue.result()) {
+      onExitLoop();
+      return true;
+    }
+  }
+  return false;
+}
+
+void LoopRunner::onEnterLoop() {
+  // TODO(tracyzhou): Add logging.
+}
+
+void LoopRunner::onEnterIteration() {
+  // TODO(tracyzhou): Add logging.
+}
+
+void LoopRunner::onExitIteration() {
+  // TODO(tracyzhou): Add logging.
+}
+
+void LoopRunner::onExitLoop() {
+  // TODO(tracyzhou): Add logging.
+}
+
+void LoopRunner::onExceptionExitLoop(Exception::Value exception) {
+  // TODO(tracyzhou): Add logging.
+}
+
+}  // namespace connections
+}  // namespace nearby
+}  // namespace location