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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.
#include "components/scheduler/base/real_time_domain.h"
#include "base/bind.h"
#include "components/scheduler/base/task_queue_impl.h"
#include "components/scheduler/base/task_queue_manager.h"
#include "components/scheduler/base/task_queue_manager_delegate.h"
namespace scheduler {
RealTimeDomain::RealTimeDomain(const char* tracing_category)
: TimeDomain(nullptr),
tracing_category_(tracing_category),
task_queue_manager_(nullptr) {}
RealTimeDomain::~RealTimeDomain() {}
void RealTimeDomain::OnRegisterWithTaskQueueManager(
TaskQueueManager* task_queue_manager) {
task_queue_manager_ = task_queue_manager;
DCHECK(task_queue_manager_);
}
LazyNow RealTimeDomain::CreateLazyNow() const {
return task_queue_manager_->CreateLazyNow();
}
base::TimeTicks RealTimeDomain::Now() const {
return task_queue_manager_->delegate()->NowTicks();
}
base::TimeTicks RealTimeDomain::ComputeDelayedRunTime(
base::TimeTicks time_domain_now,
base::TimeDelta delay) const {
return time_domain_now + delay;
}
void RealTimeDomain::RequestWakeup(base::TimeTicks now, base::TimeDelta delay) {
// NOTE this is only called if the scheduled runtime is sooner than any
// previously scheduled runtime, or there is no (outstanding) previously
// scheduled runtime.
task_queue_manager_->MaybeScheduleDelayedWork(FROM_HERE, now, delay);
}
bool RealTimeDomain::MaybeAdvanceTime() {
base::TimeTicks next_run_time;
if (!NextScheduledRunTime(&next_run_time))
return false;
base::TimeTicks now = Now();
if (now >= next_run_time)
return true; // Causes DoWork to post a continuation.
base::TimeDelta delay = next_run_time - now;
TRACE_EVENT1(tracing_category_, "RealTimeDomain::MaybeAdvanceTime",
"delay_ms", delay.InMillisecondsF());
// The next task is sometime in the future, make sure we schedule a DoWork to
// run it.
task_queue_manager_->MaybeScheduleDelayedWork(FROM_HERE, now, delay);
return false;
}
void RealTimeDomain::AsValueIntoInternal(
base::trace_event::TracedValue* state) const {}
const char* RealTimeDomain::GetName() const {
return "RealTimeDomain";
}
} // namespace scheduler
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