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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 "chrome/browser/task_management/task_manager_interface.h"
#include "chrome/browser/task_management/sampling/task_manager_impl.h"
#include "chrome/browser/task_management/sampling/task_manager_io_thread_helper.h"
#include "chrome/browser/task_manager/task_manager.h"
#include "chrome/common/chrome_switches.h"
#include "content/public/browser/browser_thread.h"
namespace task_management {
// static
TaskManagerInterface* TaskManagerInterface::GetTaskManager() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return TaskManagerImpl::GetInstance();
}
// static
void TaskManagerInterface::OnRawBytesRead(const net::URLRequest& request,
int64_t bytes_read) {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
if (switches::NewTaskManagerEnabled())
TaskManagerIoThreadHelper::OnRawBytesRead(request, bytes_read);
else
TaskManager::GetInstance()->model()->NotifyBytesRead(request, bytes_read);
}
void TaskManagerInterface::AddObserver(TaskManagerObserver* observer) {
observers_.AddObserver(observer);
observer->observed_task_manager_ = this;
ResourceFlagsAdded(observer->desired_resources_flags());
base::TimeDelta current_refresh_time = GetCurrentRefreshTime();
if (current_refresh_time == base::TimeDelta::Max()) {
// This is the first observer to be added. Start updating.
StartUpdating();
}
if (observer->desired_refresh_time() > current_refresh_time)
return;
// Reached here, then this is EITHER (not the first observer to be added AND
// it requires a more frequent refresh rate) OR (it's the very first observer
// to be added).
// Reset the refresh timer.
ScheduleRefresh(observer->desired_refresh_time());
}
void TaskManagerInterface::RemoveObserver(TaskManagerObserver* observer) {
observers_.RemoveObserver(observer);
observer->observed_task_manager_ = nullptr;
// Recalculate the minimum refresh rate and the enabled resource flags.
int64_t flags = 0;
base::TimeDelta min_time = base::TimeDelta::Max();
base::ObserverList<TaskManagerObserver>::Iterator itr(&observers_);
while (TaskManagerObserver* obs = itr.GetNext()) {
if (obs->desired_refresh_time() < min_time)
min_time = obs->desired_refresh_time();
flags |= obs->desired_resources_flags();
}
if (min_time == base::TimeDelta::Max()) {
// This is the last observer to be removed. Stop updating.
SetEnabledResourceFlags(0);
refresh_timer_->Stop();
StopUpdating();
} else {
SetEnabledResourceFlags(flags);
ScheduleRefresh(min_time);
}
}
void TaskManagerInterface::RecalculateRefreshFlags() {
int64_t flags = 0;
base::ObserverList<TaskManagerObserver>::Iterator itr(&observers_);
while (TaskManagerObserver* obs = itr.GetNext())
flags |= obs->desired_resources_flags();
SetEnabledResourceFlags(flags);
}
bool TaskManagerInterface::IsResourceRefreshEnabled(RefreshType type) const {
return (enabled_resources_flags_ & type) != 0;
}
TaskManagerInterface::TaskManagerInterface()
: observers_(),
refresh_timer_(new base::Timer(true, true)),
enabled_resources_flags_(0) {
}
TaskManagerInterface::~TaskManagerInterface() {
}
void TaskManagerInterface::NotifyObserversOnTaskAdded(TaskId id) {
FOR_EACH_OBSERVER(TaskManagerObserver, observers_, OnTaskAdded(id));
}
void TaskManagerInterface::NotifyObserversOnTaskToBeRemoved(TaskId id) {
FOR_EACH_OBSERVER(TaskManagerObserver, observers_, OnTaskToBeRemoved(id));
}
void TaskManagerInterface::NotifyObserversOnRefresh(
const TaskIdList& task_ids) {
FOR_EACH_OBSERVER(TaskManagerObserver,
observers_,
OnTasksRefreshed(task_ids));
}
void TaskManagerInterface::NotifyObserversOnRefreshWithBackgroundCalculations(
const TaskIdList& task_ids) {
FOR_EACH_OBSERVER(TaskManagerObserver,
observers_,
OnTasksRefreshedWithBackgroundCalculations(task_ids));
}
void TaskManagerInterface::NotifyObserversOnTaskUnresponsive(TaskId id) {
FOR_EACH_OBSERVER(TaskManagerObserver, observers_, OnTaskUnresponsive(id));
}
base::TimeDelta TaskManagerInterface::GetCurrentRefreshTime() const {
return refresh_timer_->IsRunning() ? refresh_timer_->GetCurrentDelay()
: base::TimeDelta::Max();
}
void TaskManagerInterface::ResourceFlagsAdded(int64_t flags) {
enabled_resources_flags_ |= flags;
}
void TaskManagerInterface::SetEnabledResourceFlags(int64_t flags) {
enabled_resources_flags_ = flags;
}
void TaskManagerInterface::ScheduleRefresh(base::TimeDelta refresh_time) {
refresh_timer_->Start(FROM_HERE,
refresh_time,
base::Bind(&TaskManagerInterface::Refresh,
base::Unretained(this)));
}
} // namespace task_management
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