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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 "chromeos/power/power_state_override.h"
#include "base/bind.h"
#include "base/message_loop.h"
#include "base/time.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "chromeos/dbus/power_manager_client.h"
namespace {
// Frequency with which overrides are renewed.
const int kHeartbeatTimeInSecs = 300;
// Duration beyond |kHeartbeatTimeInSecs| for which overrides are requested.
// This should be long enough that we're able to renew the request before it
// expires, but short enough that the power manager won't end up honoring a
// stale request for a long time if Chrome crashes and orphans its requests.
const int kRequestSlackInSecs = 15;
} // namespace
namespace chromeos {
PowerStateOverride::PowerStateOverride(Mode mode)
: override_types_(0),
request_id_(0),
weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
switch (mode) {
case BLOCK_DISPLAY_SLEEP:
override_types_ |= (PowerManagerClient::DISABLE_IDLE_DIM |
PowerManagerClient::DISABLE_IDLE_BLANK);
// fallthrough
case BLOCK_SYSTEM_SUSPEND:
override_types_ |= (PowerManagerClient::DISABLE_IDLE_SUSPEND |
PowerManagerClient::DISABLE_IDLE_LID_SUSPEND);
break;
default:
NOTREACHED() << "Unhandled mode " << mode;
}
// request_id_ = 0 will create a new override request.
CallRequestPowerStateOverrides();
heartbeat_.Start(FROM_HERE,
base::TimeDelta::FromSeconds(kHeartbeatTimeInSecs),
weak_ptr_factory_.GetWeakPtr(),
&PowerStateOverride::CallRequestPowerStateOverrides);
}
PowerStateOverride::~PowerStateOverride() {
heartbeat_.Stop();
PowerManagerClient* power_manager =
DBusThreadManager::Get()->GetPowerManagerClient();
if (power_manager)
power_manager->CancelPowerStateOverrides(request_id_);
}
void PowerStateOverride::SetRequestId(uint32 request_id) {
request_id_ = request_id;
}
void PowerStateOverride::CallRequestPowerStateOverrides() {
PowerManagerClient* power_manager =
DBusThreadManager::Get()->GetPowerManagerClient();
if (power_manager) {
power_manager->RequestPowerStateOverrides(
request_id_,
base::TimeDelta::FromSeconds(
kHeartbeatTimeInSecs + kRequestSlackInSecs),
override_types_,
base::Bind(&PowerStateOverride::SetRequestId,
weak_ptr_factory_.GetWeakPtr()));
}
}
} // namespace chromeos
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