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Currently, all Flutter threads are managed by the engine itself. This works for all threads except the platform thread. On this thread, the engine cannot see the underlying event multiplexing mechanism. Using the new task runner interfaces, the engine can relinquish the task of setting up the event multiplexing mechanism and instead have the embedder provide one for it during setup. This scheme is only wired up for the platform thread. But, the eventual goal is to expose this message loop interoperability for all threads.
47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_FML_TASK_RUNNER_H_
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#define FLUTTER_FML_TASK_RUNNER_H_
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#include "flutter/fml/closure.h"
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#include "flutter/fml/macros.h"
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#include "flutter/fml/memory/ref_counted.h"
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#include "flutter/fml/memory/ref_ptr.h"
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#include "flutter/fml/time/time_point.h"
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namespace fml {
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class MessageLoopImpl;
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class TaskRunner : public fml::RefCountedThreadSafe<TaskRunner> {
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public:
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virtual ~TaskRunner();
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virtual void PostTask(fml::closure task);
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virtual void PostTaskForTime(fml::closure task, fml::TimePoint target_time);
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virtual void PostDelayedTask(fml::closure task, fml::TimeDelta delay);
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virtual bool RunsTasksOnCurrentThread();
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static void RunNowOrPostTask(fml::RefPtr<fml::TaskRunner> runner,
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fml::closure task);
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protected:
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TaskRunner(fml::RefPtr<MessageLoopImpl> loop);
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private:
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fml::RefPtr<MessageLoopImpl> loop_;
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FML_FRIEND_MAKE_REF_COUNTED(TaskRunner);
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FML_FRIEND_REF_COUNTED_THREAD_SAFE(TaskRunner);
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FML_DISALLOW_COPY_AND_ASSIGN(TaskRunner);
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};
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} // namespace fml
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#endif // FLUTTER_FML_TASK_RUNNER_H_
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