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// Copyright 2014 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.
#include "content/child/scheduler/worker_scheduler_impl.h"
#include "base/bind.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_event_argument.h"
#include "content/child/scheduler/nestable_single_thread_task_runner.h"
namespace content {
WorkerSchedulerImpl::WorkerSchedulerImpl(
scoped_refptr<NestableSingleThreadTaskRunner> main_task_runner)
: helper_(main_task_runner,
this,
"worker.scheduler",
TRACE_DISABLED_BY_DEFAULT("worker.scheduler"),
"WorkerSchedulerIdlePeriod",
SchedulerHelper::TASK_QUEUE_COUNT,
base::TimeDelta::FromMilliseconds(300)) {
initialized_ = false;
TRACE_EVENT_OBJECT_CREATED_WITH_ID(
TRACE_DISABLED_BY_DEFAULT("worker.scheduler"), "WorkerScheduler", this);
}
WorkerSchedulerImpl::~WorkerSchedulerImpl() {
TRACE_EVENT_OBJECT_DELETED_WITH_ID(
TRACE_DISABLED_BY_DEFAULT("worker.scheduler"), "WorkerScheduler", this);
}
void WorkerSchedulerImpl::Init() {
initialized_ = true;
helper_.EnableLongIdlePeriod();
}
scoped_refptr<base::SingleThreadTaskRunner>
WorkerSchedulerImpl::DefaultTaskRunner() {
DCHECK(initialized_);
return helper_.DefaultTaskRunner();
}
scoped_refptr<SingleThreadIdleTaskRunner>
WorkerSchedulerImpl::IdleTaskRunner() {
DCHECK(initialized_);
return helper_.IdleTaskRunner();
}
bool WorkerSchedulerImpl::CanExceedIdleDeadlineIfRequired() const {
DCHECK(initialized_);
return helper_.CanExceedIdleDeadlineIfRequired();
}
bool WorkerSchedulerImpl::ShouldYieldForHighPriorityWork() {
// We don't consider any work as being high priority on workers.
return false;
}
void WorkerSchedulerImpl::AddTaskObserver(
base::MessageLoop::TaskObserver* task_observer) {
DCHECK(initialized_);
helper_.AddTaskObserver(task_observer);
}
void WorkerSchedulerImpl::RemoveTaskObserver(
base::MessageLoop::TaskObserver* task_observer) {
DCHECK(initialized_);
helper_.RemoveTaskObserver(task_observer);
}
void WorkerSchedulerImpl::Shutdown() {
DCHECK(initialized_);
helper_.Shutdown();
}
void WorkerSchedulerImpl::SetTimeSourceForTesting(
scoped_refptr<cc::TestNowSource> time_source) {
helper_.SetTimeSourceForTesting(time_source);
}
void WorkerSchedulerImpl::SetWorkBatchSizeForTesting(size_t work_batch_size) {
helper_.SetWorkBatchSizeForTesting(work_batch_size);
}
bool WorkerSchedulerImpl::CanEnterLongIdlePeriod(base::TimeTicks,
base::TimeDelta*) {
return true;
}
base::TimeTicks WorkerSchedulerImpl::CurrentIdleTaskDeadlineForTesting() const {
base::TimeTicks deadline;
helper_.CurrentIdleTaskDeadlineCallback(&deadline);
return deadline;
}
} // namespace content
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