summaryrefslogtreecommitdiff
path: root/hal/HalTypes.h
blob: dc29f0553b77523214c16a12c2a7917ef12b3e50 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_hal_Types_h
#define mozilla_hal_Types_h

#include "ipc/IPCMessageUtils.h"
#include "mozilla/Observer.h"

namespace mozilla {
namespace hal {

/**
 * These constants specify special values for content process IDs.  You can get
 * a content process ID by calling ContentChild::GetID() or
 * ContentParent::GetChildID().
 */
const uint64_t CONTENT_PROCESS_ID_UNKNOWN = uint64_t(-1);
const uint64_t CONTENT_PROCESS_ID_MAIN = 0;

/**
 * These are defined by libhardware, specifically, hardware/libhardware/include/hardware/lights.h
 * in the gonk subsystem.
 * If these change and are exposed to JS, make sure nsIHal.idl is updated as well.
 */
enum ShutdownMode {
  eHalShutdownMode_Unknown  = -1,
  eHalShutdownMode_PowerOff = 0,
  eHalShutdownMode_Reboot   = 1,
  eHalShutdownMode_Restart  = 2,
  eHalShutdownMode_Count    = 3
};

// Note that we rely on the order of this enum's entries.  Higher priorities
// should have larger int values.
enum ProcessPriority {
  PROCESS_PRIORITY_UNKNOWN = -1,
  PROCESS_PRIORITY_BACKGROUND,
  PROCESS_PRIORITY_BACKGROUND_PERCEIVABLE,
  PROCESS_PRIORITY_FOREGROUND_KEYBOARD,
  // The special class for the preallocated process, high memory priority but
  // low CPU priority.
  PROCESS_PRIORITY_PREALLOC,
  // Any priority greater than or equal to FOREGROUND is considered
  // "foreground" for the purposes of priority testing, for example
  // CurrentProcessIsForeground().
  PROCESS_PRIORITY_FOREGROUND,
  PROCESS_PRIORITY_FOREGROUND_HIGH,
  PROCESS_PRIORITY_MASTER,
  NUM_PROCESS_PRIORITY
};

/**
 * Values that can be passed to hal::SetCurrentThreadPriority().  These should be
 * functional in nature, such as COMPOSITOR, instead of levels, like LOW/HIGH.
 * This allows us to tune our priority scheme for the system in one place such
 * that it makes sense holistically for the overall operating system.  On gonk
 * or android we may want different priority schemes than on windows, etc.
 */
enum ThreadPriority {
  THREAD_PRIORITY_COMPOSITOR,
  NUM_THREAD_PRIORITY
};

/**
 * Convert a ProcessPriority enum value to a string.  The strings returned by
 * this function are statically allocated; do not attempt to free one!
 *
 * If you pass an unknown process priority, we fatally assert in debug
 * builds and otherwise return "???".
 */
const char*
ProcessPriorityToString(ProcessPriority aPriority);

/**
 * Convert a ThreadPriority enum value to a string.  The strings returned by
 * this function are statically allocated; do not attempt to free one!
 *
 * If you pass an unknown process priority, we assert in debug builds
 * and otherwise return "???".
 */
const char *
ThreadPriorityToString(ThreadPriority aPriority);

/**
 * Used by ModifyWakeLock
 */
enum WakeLockControl {
  WAKE_LOCK_REMOVE_ONE = -1,
  WAKE_LOCK_NO_CHANGE  = 0,
  WAKE_LOCK_ADD_ONE    = 1,
  NUM_WAKE_LOCK
};

} // namespace hal
} // namespace mozilla

namespace IPC {

/**
 * Serializer for ShutdownMode.
 */
template <>
struct ParamTraits<mozilla::hal::ShutdownMode>
  : public ContiguousEnumSerializer<
             mozilla::hal::ShutdownMode,
             mozilla::hal::eHalShutdownMode_Unknown,
             mozilla::hal::eHalShutdownMode_Count>
{};

/**
 * WakeLockControl serializer.
 */
template <>
struct ParamTraits<mozilla::hal::WakeLockControl>
  : public ContiguousEnumSerializer<
             mozilla::hal::WakeLockControl,
             mozilla::hal::WAKE_LOCK_REMOVE_ONE,
             mozilla::hal::NUM_WAKE_LOCK>
{};

template <>
struct ParamTraits<mozilla::hal::ProcessPriority>:
  public ContiguousEnumSerializer<
           mozilla::hal::ProcessPriority,
           mozilla::hal::PROCESS_PRIORITY_UNKNOWN,
           mozilla::hal::NUM_PROCESS_PRIORITY> {
};


} // namespace IPC

#endif // mozilla_hal_Types_h