blob: c6248f3944883b5c2e680d9e25cebbea01f2aad8 [file] [log] [blame]
// Copyright 2018 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 <memory>
#include <string>
#include <vector>
#include "base/files/file_descriptor_watcher_posix.h"
#include "base/files/scoped_file.h"
#include "base/macros.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/threading/sequenced_task_runner_handle.h"
#include "base/threading/thread.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "chromeos/dbus/power_manager_client.h"
namespace chromeos {
using OnStartNativeTimerCallback = base::OnceCallback<void(bool)>;
// Sets timers that can also wake up the device from suspend by making D-Bus
// calls to the power daemon.
explicit NativeTimer(const std::string& tag);
// Starts a timer to expire at |absolute_expiration_time|. Runs
// |timer_expiration_callback| on timer expiration. Runs |result_callback|
// with the result of the start operation. If starting the timer failed then
// |timer_expiration_callback| will not be called.
// Consecutive |Start| calls override the previous |Start| call.
void Start(base::TimeTicks absolute_expiration_time,
base::OnceClosure timer_expiration_callback,
OnStartNativeTimerCallback result_callback);
struct StartTimerParams;
// D-Bus callback for a create timer D-Bus call.
void OnCreateTimer(base::ScopedFD expiration_fd,
base::Optional<std::vector<int32_t>> timer_ids);
// D-Bus callback for a start timer D-Bus call.
void OnStartTimer(base::OnceClosure timer_expiration_callback,
OnStartNativeTimerCallback result_callback,
bool result);
// Callback for timer expiration.
void OnExpiration();
// Resets the |expiration_fd_watcher_| and cancels any inflight callbacks.
void ResetState();
// Calls the result callback for a pending |Start| operation with false iff
// |result| is false. Else, schedules a timer using the D-Bus API and calls
// the result callback for a pending |Start| operation with true. Resets
// |in_flight_start_timer_params_| in all cases.
void ProcessAndResetInFlightStartParams(bool result);
// Stores the parameters for |Start| when timer is not yet created i.e.
// |timer_id_| is uninitialized. Since |Start| calls override each other at
// any point only the latest |Start| call's parameters are stored in this.
std::unique_ptr<StartTimerParams> in_flight_start_timer_params_;
// Timer id returned by the power daemon, to be used as a handle for the timer
// APIs.
PowerManagerClient::TimerId timer_id_;
// Tag associated with the D-Bus API. Cached for deleting the timer in the
// destructor.
std::string tag_;
// File descriptor that will be written to when a Chrome OS alarm fires.
base::ScopedFD expiration_fd_;
// Callback to run when the timer expires.
base::OnceClosure timer_expiration_callback_;
// Watches |expiration_fd_| for an event.
base::WeakPtrFactory<NativeTimer> weak_factory_;
} // namespace chromeos