mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Samuel Susla
dbda1917cc
Summary: changelog: [internal] Don't use C++ 17 features in RuntimeScheduler module as it needs to be imported into C++14 module. Also removes redundant dependency. Reviewed By: ShikaSD Differential Revision: D30485642 fbshipit-source-id: 0a20f85c596eebe193affc815c8ca851fc72e46d
106 lines
2.8 KiB
C++
106 lines
2.8 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <ReactCommon/RuntimeExecutor.h>
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#include <react/renderer/runtimescheduler/RuntimeSchedulerClock.h>
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#include <react/renderer/runtimescheduler/Task.h>
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#include <atomic>
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#include <memory>
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#include <queue>
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namespace facebook {
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namespace react {
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class RuntimeScheduler final {
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public:
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RuntimeScheduler(
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RuntimeExecutor const &runtimeExecutor,
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std::function<RuntimeSchedulerTimePoint()> now =
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RuntimeSchedulerClock::now);
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/*
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* Not copyable.
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*/
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RuntimeScheduler(RuntimeScheduler const &) = delete;
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RuntimeScheduler &operator=(RuntimeScheduler const &) = delete;
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/*
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* Not movable.
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*/
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RuntimeScheduler(RuntimeScheduler &&) = delete;
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RuntimeScheduler &operator=(RuntimeScheduler &&) = delete;
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void scheduleWork(std::function<void(jsi::Runtime &)> callback) const;
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/*
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* Grants access to the runtime synchronously on the caller's thread.
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*
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* Shouldn't be called directly. it is expected to be used
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* by dispatching a synchronous event via event emitter in your native
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* component.
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*/
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void executeNowOnTheSameThread(
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std::function<void(jsi::Runtime &runtime)> callback) const;
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std::shared_ptr<Task> scheduleTask(
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SchedulerPriority priority,
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jsi::Function callback);
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void cancelTask(std::shared_ptr<Task> const &task) noexcept;
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bool getShouldYield() const noexcept;
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SchedulerPriority getCurrentPriorityLevel() const noexcept;
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RuntimeSchedulerTimePoint now() const noexcept;
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void setEnableYielding(bool enableYielding);
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private:
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mutable std::priority_queue<
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std::shared_ptr<Task>,
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std::vector<std::shared_ptr<Task>>,
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TaskPriorityComparer>
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taskQueue_;
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RuntimeExecutor const runtimeExecutor_;
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mutable SchedulerPriority currentPriority_{SchedulerPriority::NormalPriority};
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mutable std::atomic_bool shouldYield_{false};
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void startWorkLoop(jsi::Runtime &runtime) const;
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/*
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* Returns a time point representing the current point in time. May be called
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* from multiple threads.
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*/
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std::function<RuntimeSchedulerTimePoint()> now_;
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/*
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* Flag indicating if callback on JavaScript queue has been
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* scheduled.
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*/
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std::atomic_bool isCallbackScheduled_{false};
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/*
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* Flag indicating if yielding is enabled.
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*
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* If set to true and Concurrent Mode is enabled on the surface,
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* React Native will ask React to yield in case any work has been scheduled.
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* Default value is false
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*/
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bool enableYielding_{false};
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/*
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* This flag is set while performing work, to prevent re-entrancy.
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*/
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mutable bool isPerformingWork_{false};
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};
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} // namespace react
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} // namespace facebook
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