Event loop wrapper classes for wificond

[android-x86/system-connectivity-wificond.git] / looper_backed_event_loop.cpp

diff --git a/looper_backed_event_loop.cpp b/looper_backed_event_loop.cpp
new file mode 100644 (file)
index 0000000..ef2389a
--- /dev/null
+++ b/looper_backed_event_loop.cpp
@@ -0,0 +1,80 @@
+//
+// Copyright (C) 2016 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.
+//
+
+#include <looper_backed_event_loop.h>
+
+#include <utils/Looper.h>
+#include <utils/Timers.h>
+
+namespace {
+
+class EventLoopCallback : public android::MessageHandler {
+ public:
+  explicit EventLoopCallback(const std::function<void()>& callback)
+      : callback_(callback) {
+  }
+
+  ~EventLoopCallback() override = default;
+
+  virtual void handleMessage(const android::Message& message) {
+    callback_();
+  }
+
+ private:
+  const std::function<void()> callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(EventLoopCallback);
+};
+
+}  // namespace
+
+namespace android {
+namespace wificond {
+
+
+LooperBackedEventLoop::LooperBackedEventLoop()
+    : should_continue_(true) {
+  looper_ = android::Looper::prepare(Looper::PREPARE_ALLOW_NON_CALLBACKS);
+}
+
+LooperBackedEventLoop::~LooperBackedEventLoop() {
+}
+
+void LooperBackedEventLoop::PostTask(const std::function<void()>& callback) {
+  sp<android::MessageHandler> event_loop_callback =
+      new EventLoopCallback(callback);
+  looper_->sendMessage(event_loop_callback, NULL);
+}
+
+void LooperBackedEventLoop::PostDelayedTask(
+    const std::function<void()>& callback,
+    int64_t delay_ms) {
+  sp<android::MessageHandler> looper_callback = new EventLoopCallback(callback);
+  looper_->sendMessageDelayed(ms2ns(delay_ms), looper_callback, NULL);
+}
+
+void LooperBackedEventLoop::Poll() {
+  while (should_continue_) {
+    looper_->pollOnce(-1);
+  }
+}
+
+void LooperBackedEventLoop::TriggerExit() {
+  PostTask([this](){ should_continue_ = false; });
+}
+
+}  // namespace wificond
+}  // namespace android