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48db20f6f5
PR-URL: https://github.com/nodejs/node/pull/35700 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com>
85 lines
2.6 KiB
C++
85 lines
2.6 KiB
C++
// Copyright 2020 the V8 project 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 INCLUDE_CPPGC_DEFAULT_PLATFORM_H_
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#define INCLUDE_CPPGC_DEFAULT_PLATFORM_H_
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#include <memory>
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#include <vector>
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#include "cppgc/platform.h"
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#include "v8config.h" // NOLINT(build/include_directory)
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namespace cppgc {
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namespace internal {
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class DefaultJob;
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} // namespace internal
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/**
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* Default task runner implementation. Keep posted tasks in a list that can be
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* processed by calling RunSingleTask() or RunUntilIdle().
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*/
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class V8_EXPORT DefaultTaskRunner final : public cppgc::TaskRunner {
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public:
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DefaultTaskRunner() = default;
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DefaultTaskRunner(const DefaultTaskRunner&) = delete;
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DefaultTaskRunner& operator=(const DefaultTaskRunner&) = delete;
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void PostTask(std::unique_ptr<cppgc::Task> task) override;
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void PostDelayedTask(std::unique_ptr<cppgc::Task> task, double) override;
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bool NonNestableTasksEnabled() const final { return false; }
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bool NonNestableDelayedTasksEnabled() const final { return false; }
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void PostNonNestableTask(std::unique_ptr<cppgc::Task> task) override;
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void PostNonNestableDelayedTask(std::unique_ptr<cppgc::Task> task,
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double) override;
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void PostIdleTask(std::unique_ptr<cppgc::IdleTask> task) override;
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bool IdleTasksEnabled() override { return true; }
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bool RunSingleTask();
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bool RunSingleIdleTask(double duration_in_seconds);
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void RunUntilIdle();
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private:
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std::vector<std::unique_ptr<cppgc::Task>> tasks_;
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std::vector<std::unique_ptr<cppgc::IdleTask>> idle_tasks_;
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};
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/**
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* Default platform implementation that uses std::thread for spawning job tasks.
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*/
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class V8_EXPORT DefaultPlatform final : public Platform {
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public:
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DefaultPlatform();
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~DefaultPlatform() noexcept override;
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cppgc::PageAllocator* GetPageAllocator() final;
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double MonotonicallyIncreasingTime() final;
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std::shared_ptr<cppgc::TaskRunner> GetForegroundTaskRunner() final;
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// DefaultPlatform does not support job priorities. All jobs would be
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// assigned the same priority regardless of the cppgc::TaskPriority parameter.
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std::unique_ptr<cppgc::JobHandle> PostJob(
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cppgc::TaskPriority priority,
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std::unique_ptr<cppgc::JobTask> job_task) final;
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void WaitAllForegroundTasks();
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void WaitAllBackgroundTasks();
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private:
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std::unique_ptr<PageAllocator> page_allocator_;
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std::shared_ptr<DefaultTaskRunner> foreground_task_runner_;
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std::vector<std::shared_ptr<internal::DefaultJob>> jobs_;
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};
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} // namespace cppgc
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#endif // INCLUDE_CPPGC_DEFAULT_PLATFORM_H_
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