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// Copyright (c) 2012 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/browser/power_save_blocker_impl.h"
#include <string>
#include "base/basictypes.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "chromeos/dbus/power_policy_controller.h"
#include "content/public/browser/browser_thread.h"
namespace content {
class PowerSaveBlockerImpl::Delegate
: public base::RefCountedThreadSafe<PowerSaveBlockerImpl::Delegate> {
public:
Delegate(PowerSaveBlockerType type, const std::string& reason)
: type_(type),
reason_(reason),
block_id_(0) {}
void ApplyBlock() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!chromeos::DBusThreadManager::IsInitialized()) {
LOG(WARNING) << "DBusThreadManager not initialized";
return;
}
chromeos::PowerPolicyController* controller =
chromeos::DBusThreadManager::Get()->GetPowerPolicyController();
switch (type_) {
case kPowerSaveBlockPreventAppSuspension:
block_id_ = controller->AddSystemWakeLock(reason_);
break;
case kPowerSaveBlockPreventDisplaySleep:
block_id_ = controller->AddScreenWakeLock(reason_);
break;
default:
NOTREACHED() << "Unhandled block type " << type_;
}
}
void RemoveBlock() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!chromeos::DBusThreadManager::IsInitialized()) {
LOG(WARNING) << "DBusThreadManager not initialized";
return;
}
chromeos::DBusThreadManager::Get()->GetPowerPolicyController()->
RemoveWakeLock(block_id_);
}
private:
friend class base::RefCountedThreadSafe<Delegate>;
virtual ~Delegate() {}
PowerSaveBlockerType type_;
std::string reason_;
// ID corresponding to the block request in PowerPolicyController.
int block_id_;
DISALLOW_COPY_AND_ASSIGN(Delegate);
};
PowerSaveBlockerImpl::PowerSaveBlockerImpl(PowerSaveBlockerType type,
const std::string& reason)
: delegate_(new Delegate(type, reason)) {
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&Delegate::ApplyBlock, delegate_));
}
PowerSaveBlockerImpl::~PowerSaveBlockerImpl() {
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&Delegate::RemoveBlock, delegate_));
}
} // namespace content
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