Branch out Broadcast Radio 1.2 HAL.

Bug: 62945293
Change-Id: Ic84f9fe6c17040053257085801208ed527fd07ab
Fixes: 64115813
Test: instrumentation, VTS

1 files changed, 89 insertions, 0 deletions

diff --git a/broadcastradio/common/utils/WorkerThread.cpp b/broadcastradio/common/utils/WorkerThread.cpp
new file mode 100644
index 0000000000..bfcbb390e8
--- /dev/null
+++ b/broadcastradio/common/utils/WorkerThread.cpp
@@ -0,0 +1,89 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "WorkerThread"
+//#define LOG_NDEBUG 0
+
+#include <broadcastradio-utils/WorkerThread.h>
+
+#include <log/log.h>
+
+namespace android {
+
+using std::chrono::milliseconds;
+using std::chrono::steady_clock;
+using std::function;
+using std::lock_guard;
+using std::mutex;
+using std::priority_queue;
+using std::this_thread::sleep_for;
+using std::unique_lock;
+
+bool operator<(const WorkerThread::Task& lhs, const WorkerThread::Task& rhs) {
+    return lhs.when > rhs.when;
+}
+
+WorkerThread::WorkerThread() : mIsTerminating(false), mThread(&WorkerThread::threadLoop, this) {}
+
+WorkerThread::~WorkerThread() {
+    ALOGV("%s", __func__);
+    {
+        lock_guard<mutex> lk(mMut);
+        mIsTerminating = true;
+        mCond.notify_one();
+    }
+    mThread.join();
+}
+
+void WorkerThread::schedule(function<void()> task, milliseconds delay) {
+    ALOGV("%s", __func__);
+
+    auto when = steady_clock::now() + delay;
+
+    lock_guard<mutex> lk(mMut);
+    mTasks.push(Task({when, task}));
+    mCond.notify_one();
+}
+
+void WorkerThread::cancelAll() {
+    ALOGV("%s", __func__);
+
+    lock_guard<mutex> lk(mMut);
+    priority_queue<Task>().swap(mTasks);  // empty queue
+}
+
+void WorkerThread::threadLoop() {
+    ALOGV("%s", __func__);
+    while (!mIsTerminating) {
+        unique_lock<mutex> lk(mMut);
+        if (mTasks.empty()) {
+            mCond.wait(lk);
+            continue;
+        }
+
+        auto task = mTasks.top();
+        if (task.when > steady_clock::now()) {
+            mCond.wait_until(lk, task.when);
+            continue;
+        }
+
+        mTasks.pop();
+        lk.unlock();  // what() might need to schedule another task
+        task.what();
+    }
+}
+
+}  // namespace android