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https://github.com/encounter/engine.git
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Kaushik Iska
fe7e444d6f
* Refactor to move Task Queue to its own class - This is to help with sharing task queue among multiple message loops going forward. - currently there is 1:1 mapping between task queue and message loop, we are still maintaining the semantics for this change. * Add mutex include * Add unit tests for task queue * fix formatting * license
76 lines
1.7 KiB
C++
76 lines
1.7 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_MESSAGE_LOOP_TASK_QUEUE_H_
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#define FLUTTER_FML_MESSAGE_LOOP_TASK_QUEUE_H_
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#include <map>
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#include <mutex>
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#include <vector>
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#include "flutter/fml/closure.h"
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#include "flutter/fml/delayed_task.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/synchronization/thread_annotations.h"
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namespace fml {
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enum class FlushType {
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kSingle,
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kAll,
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};
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// This class keeps track of all the tasks and observers that
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// need to be run on it's MessageLoopImpl.
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class MessageLoopTaskQueue {
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public:
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// Lifecycle.
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MessageLoopTaskQueue();
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~MessageLoopTaskQueue();
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void Dispose();
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// Tasks methods.
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fml::TimePoint RegisterTask(fml::closure task, fml::TimePoint target_time);
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bool HasPendingTasks();
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// Returns the wake up time.
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fml::TimePoint GetTasksToRunNow(FlushType type,
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std::vector<fml::closure>& invocations);
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size_t GetNumPendingTasks();
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// Observers methods.
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void AddTaskObserver(intptr_t key, fml::closure callback);
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void RemoveTaskObserver(intptr_t key);
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void NotifyObservers();
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// Misc.
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void Swap(MessageLoopTaskQueue& other);
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private:
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std::mutex observers_mutex_;
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std::map<intptr_t, fml::closure> task_observers_
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FML_GUARDED_BY(observers_mutex_);
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std::mutex delayed_tasks_mutex_;
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DelayedTaskQueue delayed_tasks_ FML_GUARDED_BY(delayed_tasks_mutex_);
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size_t order_ FML_GUARDED_BY(delayed_tasks_mutex_);
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FML_DISALLOW_COPY_ASSIGN_AND_MOVE(MessageLoopTaskQueue);
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};
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} // namespace fml
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#endif // FLUTTER_FML_MESSAGE_LOOP_TASK_QUEUE_H_
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