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// 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 <vector>
#include "cppgc/platform.h"
#include "v8config.h" // NOLINT(build/include_directory)
namespace cppgc {
namespace internal {
class DefaultJob;
} // namespace internal
/**
* 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;
// DefaultPlatform does not support job priorities. All jobs would be
// assigned the same priority regardless of the cppgc::TaskPriority parameter.
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<internal::DefaultJob>> jobs_;
};
} // namespace cppgc
#endif // INCLUDE_CPPGC_DEFAULT_PLATFORM_H_
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