v8/include/cppgc/default-platform.h
Francis McCabe 2221f0909b Revert "cppgc: Provide jobs support through DefaultPlatform and TestPlatform"
This reverts commit 22c0fc8f2e.

Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20gcc/8712?

Original change's description:
> cppgc: Provide jobs support through DefaultPlatform and TestPlatform
>
> This CL extends cppgc::DefaultPlatform and TestPlatform to emulate
> jobs using std::thread and v8::base::Thread respectively.
> Jobs using these platform do not yield unless the job as been
> cancelled. Additionally, the job priority is ignored.
>
> Bug: chromium:1056170
> Change-Id: I72db1eef410d2be3d3e5ea7d4ece9e5584a451f2
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2416378
> Commit-Queue: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70139}

TBR=mlippautz@chromium.org,bikineev@chromium.org,omerkatz@chromium.org

Change-Id: Ic29235e3ab78a1b515a5b14b808e116a1ccffc0f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2432087
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70142}
2020-09-25 17:51:10 +00:00

80 lines
2.4 KiB
C++

// Copyright 2020 the V8 project 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 INCLUDE_CPPGC_DEFAULT_PLATFORM_H_
#define INCLUDE_CPPGC_DEFAULT_PLATFORM_H_
#include <memory>
#include <thread> // NOLINT(build/c++11)
#include <vector>
#include "cppgc/platform.h"
#include "v8config.h" // NOLINT(build/include_directory)
namespace cppgc {
/**
* Default task runner implementation. Keep posted tasks in a list that can be
* processed by calling RunSingleTask() or RunUntilIdle().
*/
class V8_EXPORT DefaultTaskRunner final : public cppgc::TaskRunner {
public:
DefaultTaskRunner() = default;
DefaultTaskRunner(const DefaultTaskRunner&) = delete;
DefaultTaskRunner& operator=(const DefaultTaskRunner&) = delete;
void PostTask(std::unique_ptr<cppgc::Task> task) override;
void PostDelayedTask(std::unique_ptr<cppgc::Task> task, double) override;
bool NonNestableTasksEnabled() const final { return false; }
bool NonNestableDelayedTasksEnabled() const final { return false; }
void PostNonNestableTask(std::unique_ptr<cppgc::Task> task) override;
void PostNonNestableDelayedTask(std::unique_ptr<cppgc::Task> task,
double) override;
void PostIdleTask(std::unique_ptr<cppgc::IdleTask> task) override;
bool IdleTasksEnabled() override { return true; }
bool RunSingleTask();
bool RunSingleIdleTask(double duration_in_seconds);
void RunUntilIdle();
private:
std::vector<std::unique_ptr<cppgc::Task>> tasks_;
std::vector<std::unique_ptr<cppgc::IdleTask>> idle_tasks_;
};
/**
* Default platform implementation that uses std::thread for spawning job tasks.
*/
class V8_EXPORT DefaultPlatform final : public Platform {
public:
DefaultPlatform();
~DefaultPlatform() noexcept override;
cppgc::PageAllocator* GetPageAllocator() final;
double MonotonicallyIncreasingTime() final;
std::shared_ptr<cppgc::TaskRunner> GetForegroundTaskRunner() final;
std::unique_ptr<cppgc::JobHandle> PostJob(
cppgc::TaskPriority priority,
std::unique_ptr<cppgc::JobTask> job_task) final;
void WaitAllForegroundTasks();
void WaitAllBackgroundTasks();
private:
std::unique_ptr<PageAllocator> page_allocator_;
std::shared_ptr<DefaultTaskRunner> foreground_task_runner_;
std::vector<std::shared_ptr<std::thread>> job_threads_;
};
} // namespace cppgc
#endif // INCLUDE_CPPGC_DEFAULT_PLATFORM_H_