update openharmony 1.0.1

frameworks/event_handler.cpp

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
+ * 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.
+ */
+
+#include "event_handler.h"
+
+using namespace std;
+
+namespace OHOS {
+namespace Media {
+EventHandler::EventHandler() : running_(false)
+{
+    hdlThrd_ = new thread(EventDispatch, this);
+}
+
+EventHandler::~EventHandler()
+{
+    while (!running_) {
+        this_thread::yield(); // TODO:may not effective in muscle
+    }
+    running_ = false;
+    cv_.notify_all();
+    hdlThrd_->join();
+    delete hdlThrd_;
+}
+
+bool EventHandler::IsRunning()
+{
+    return running_;
+}
+
+void EventHandler::EventDispatch(EventHandler *hdl)
+{
+    std::unique_lock<std::mutex> lock(hdl->mtx_);
+    hdl->running_ = true;
+    while (hdl->running_) {
+        if (hdl->msgQ_.empty()) {
+            hdl->cv_.wait(lock); // wait for task or exit signal
+        } else {
+            auto mission = hdl->msgQ_.front();
+            hdl->msgQ_.pop();
+            lock.unlock();
+            mission->Exec();
+            delete mission;
+            lock.lock();
+        }
+    }
+    /* Exec all tasks before exit */
+    while (!hdl->msgQ_.empty()) {
+        auto mission = hdl->msgQ_.front();
+        hdl->msgQ_.pop();
+        lock.unlock();
+        mission->Exec();
+        delete mission;
+        lock.lock();
+    }
+}
+} // namespace Media
+} // namespace OHOS