Initial Broadcast Radio HAL 1.1 default implementation.

The new implementation does not rely on legacy HAL, it implements
HAL 1.1 directly instead.

This is not a full implementation yet, but passes all existing tests.

Bug: b/36864090
Test: VTS, instrumentalization, Unit
Change-Id: Ic8eddd19d0bf6777b4086d099183d71e05d7da0e
diff --git a/broadcastradio/1.1/utils/WorkerThread.h b/broadcastradio/1.1/utils/WorkerThread.h
new file mode 100644
index 0000000..635876f
--- /dev/null
+++ b/broadcastradio/1.1/utils/WorkerThread.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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
+ *
+ *      http://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 ANDROID_HARDWARE_BROADCASTRADIO_V1_1_WORKERTHREAD_H
+#define ANDROID_HARDWARE_BROADCASTRADIO_V1_1_WORKERTHREAD_H
+
+#include <chrono>
+#include <queue>
+#include <thread>
+
+namespace android {
+
+class WorkerThread {
+   public:
+    WorkerThread();
+    virtual ~WorkerThread();
+
+    void schedule(std::function<void()> task, std::chrono::milliseconds delay);
+    void cancelAll();
+
+   private:
+    struct Task {
+        std::chrono::time_point<std::chrono::steady_clock> when;
+        std::function<void()> what;
+    };
+    friend bool operator<(const Task& lhs, const Task& rhs);
+
+    std::atomic<bool> mIsTerminating;
+    std::mutex mMut;
+    std::condition_variable mCond;
+    std::thread mThread;
+    std::priority_queue<Task> mTasks;
+
+    void threadLoop();
+};
+
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_BROADCASTRADIO_V1_1_WORKERTHREAD_H