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// Copyright 2015 The Chromium 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_WORKER_NON_MAIN_THREAD_SCHEDULER_IMPL_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_WORKER_NON_MAIN_THREAD_SCHEDULER_IMPL_H_
#include <memory>
#include "base/macros.h"
#include "base/task/sequence_manager/task_queue.h"
#include "third_party/blink/public/platform/scheduler/single_thread_idle_task_runner.h"
#include "third_party/blink/public/platform/scheduler/web_thread_scheduler.h"
#include "third_party/blink/public/platform/web_thread_type.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/scheduler/common/thread_scheduler_impl.h"
#include "third_party/blink/renderer/platform/scheduler/public/thread_scheduler.h"
#include "third_party/blink/renderer/platform/scheduler/util/tracing_helper.h"
#include "third_party/blink/renderer/platform/scheduler/worker/non_main_thread_scheduler_helper.h"
#include "third_party/blink/renderer/platform/scheduler/worker/non_main_thread_task_queue.h"
namespace blink {
namespace scheduler {
class WorkerSchedulerProxy;
class PLATFORM_EXPORT NonMainThreadSchedulerImpl : public ThreadSchedulerImpl {
public:
~NonMainThreadSchedulerImpl() override;
static std::unique_ptr<NonMainThreadSchedulerImpl> Create(
WebThreadType thread_type,
WorkerSchedulerProxy* proxy);
// Blink should use NonMainThreadSchedulerImpl::DefaultTaskQueue instead of
// WebThreadScheduler::DefaultTaskRunner.
virtual scoped_refptr<NonMainThreadTaskQueue> DefaultTaskQueue() = 0;
// Must be called before the scheduler can be used. Does any post construction
// initialization needed such as initializing idle period detection.
void Init();
virtual void OnTaskCompleted(
NonMainThreadTaskQueue* worker_task_queue,
const base::sequence_manager::TaskQueue::Task& task,
const base::sequence_manager::TaskQueue::TaskTiming& task_timing) = 0;
// ThreadSchedulerImpl:
scoped_refptr<base::SingleThreadTaskRunner> ControlTaskRunner() override;
void RegisterTimeDomain(
base::sequence_manager::TimeDomain* time_domain) override;
void UnregisterTimeDomain(
base::sequence_manager::TimeDomain* time_domain) override;
base::sequence_manager::TimeDomain* GetActiveTimeDomain() override;
const base::TickClock* GetTickClock() override;
// ThreadScheduler implementation.
// TODO(yutak): Some functions are only meaningful in main thread. Move them
// to MainThreadScheduler.
void PostIdleTask(const base::Location& location,
WebThread::IdleTask task) override;
void PostNonNestableIdleTask(const base::Location& location,
WebThread::IdleTask task) override;
std::unique_ptr<PageScheduler> CreatePageScheduler(
PageScheduler::Delegate*) override;
std::unique_ptr<RendererPauseHandle> PauseScheduler() override
WARN_UNUSED_RESULT;
// Returns TimeTicks::Now() by default.
base::TimeTicks MonotonicallyIncreasingVirtualTime() override;
NonMainThreadSchedulerImpl* AsNonMainThreadScheduler() override {
return this;
}
// The following virtual methods are defined in *both* WebThreadScheduler
// and ThreadScheduler, with identical interfaces and semantics. They are
// overriden in a subclass, effectively implementing the virtual methods
// in both classes at the same time. This is allowed in C++, as long as
// there is only one final overrider (i.e. definitions in base classes are
// not used in instantiated objects, since otherwise they may have multiple
// definitions of the virtual function in question).
//
// virtual void Shutdown();
scoped_refptr<NonMainThreadTaskQueue> CreateTaskRunner(const char* name);
protected:
static void RunIdleTask(WebThread::IdleTask task, base::TimeTicks deadline);
explicit NonMainThreadSchedulerImpl(
std::unique_ptr<NonMainThreadSchedulerHelper> helper);
friend class WorkerScheduler;
// Called during Init() for delayed initialization for subclasses.
virtual void InitImpl() = 0;
NonMainThreadSchedulerHelper* helper() { return helper_.get(); }
private:
std::unique_ptr<NonMainThreadSchedulerHelper> helper_;
DISALLOW_COPY_AND_ASSIGN(NonMainThreadSchedulerImpl);
};
} // namespace scheduler
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_WORKER_NON_MAIN_THREAD_SCHEDULER_IMPL_H_
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