1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef SYSTEM_NATIVEPOWER_DAEMON_POWER_MANAGER_H_
18#define SYSTEM_NATIVEPOWER_DAEMON_POWER_MANAGER_H_
19
20#include <memory>
21
22#include <base/files/file_path.h>
23#include <base/macros.h>
24#include <base/time/time.h>
25#include <nativepower/BnPowerManager.h>
26
27#include "system_property_setter.h"
28#include "wake_lock_manager.h"
29
30namespace android {
31
32class PowerManager : public BnPowerManager {
33 public:
34  // The part of the reboot or shutdown system properties' values that appears
35  // before the reason. These strings are hardcoded in
36  // system/core/init/builtins.cpp.
37  static const char kRebootPrefix[];
38  static const char kShutdownPrefix[];
39
40  // Value written to |power_state_path_| to suspend the system to memory.
41  static const char kPowerStateSuspend[];
42
43  PowerManager();
44  ~PowerManager() override;
45
46  // Must be called before Init().
47  void set_property_setter_for_testing(
48      std::unique_ptr<SystemPropertySetterInterface> setter) {
49    property_setter_ = std::move(setter);
50  }
51
52  // Must be called before Init().
53  void set_wake_lock_manager_for_testing(
54      std::unique_ptr<WakeLockManagerInterface> manager) {
55    wake_lock_manager_ = std::move(manager);
56  }
57
58  void set_power_state_path_for_testing(const base::FilePath& path) {
59    power_state_path_ = path;
60  }
61
62  // Initializes the object, returning true on success.
63  bool Init();
64
65  // BnPowerManager:
66  status_t acquireWakeLock(int flags,
67                           const sp<IBinder>& lock,
68                           const String16& tag,
69                           const String16& packageName,
70                           bool isOneWay=false) override;
71  status_t acquireWakeLockWithUid(int flags,
72                                  const sp<IBinder>& lock,
73                                  const String16& tag,
74                                  const String16& packageName,
75                                  int uid,
76                                  bool isOneWay=false) override;
77  status_t releaseWakeLock(const sp<IBinder>& lock,
78                           int flags,
79                           bool isOneWay=false) override;
80  status_t updateWakeLockUids(const sp<IBinder>& lock,
81                              int len,
82                              const int* uids,
83                              bool isOneWay=false) override;
84  status_t powerHint(int hintId, int data) override;
85  status_t goToSleep(int64_t event_time_ms, int reason, int flags) override;
86  status_t reboot(bool confirm, const String16& reason, bool wait) override;
87  status_t shutdown(bool confirm, const String16& reason, bool wait) override;
88  status_t crash(const String16& message) override;
89
90 private:
91  // Helper method for acquireWakeLock*(). Returns true on success.
92  bool AddWakeLockRequest(const sp<IBinder>& lock,
93                          const String16& tag,
94                          const String16& packageName,
95                          int uid);
96
97  std::unique_ptr<SystemPropertySetterInterface> property_setter_;
98  std::unique_ptr<WakeLockManagerInterface> wake_lock_manager_;
99
100  // Path to sysfs file that can be written to change the power state.
101  base::FilePath power_state_path_;
102
103  // System uptime (as duration since boot) when userspace was last resumed from
104  // suspend. Initially unset.
105  base::TimeDelta last_resume_uptime_;
106
107  DISALLOW_COPY_AND_ASSIGN(PowerManager);
108};
109
110}  // namespace android
111
112#endif  // SYSTEM_NATIVEPOWER_DAEMON_POWER_MANAGER_H_
113