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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef FLUTTER_FML_MESSAGE_LOOP_H_
#define FLUTTER_FML_MESSAGE_LOOP_H_
#include "flutter/fml/macros.h"
#include "flutter/fml/task_runner.h"
namespace fml {
class TaskRunner;
class MessageLoopImpl;
class MessageLoop {
public:
FML_EMBEDDER_ONLY
static MessageLoop& GetCurrent();
bool IsValid() const;
void Run();
void Terminate();
void AddTaskObserver(intptr_t key, const fml::closure& callback);
void RemoveTaskObserver(intptr_t key);
fml::RefPtr<fml::TaskRunner> GetTaskRunner() const;
// Exposed for the embedder shell which allows clients to poll for events
// instead of dedicating a thread to the message loop.
void RunExpiredTasksNow();
static void EnsureInitializedForCurrentThread();
static bool IsInitializedForCurrentThread();
~MessageLoop();
static TaskQueueId GetCurrentTaskQueueId();
private:
friend class TaskRunner;
friend class MessageLoopImpl;
fml::RefPtr<MessageLoopImpl> loop_;
fml::RefPtr<fml::TaskRunner> task_runner_;
MessageLoop();
fml::RefPtr<MessageLoopImpl> GetLoopImpl() const;
FML_DISALLOW_COPY_AND_ASSIGN(MessageLoop);
};
} // namespace fml
#endif // FLUTTER_FML_MESSAGE_LOOP_H_