summaryrefslogtreecommitdiff
path: root/hal/Hal.h
blob: ced295ca4cccb03425111c3365629b0b2d445a4a (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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
/* -*- Mode: C++; tab-width: 8; 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_h
#define mozilla_Hal_h

#include "base/basictypes.h"
#include "base/platform_thread.h"
#include "nsTArray.h"
#include "mozilla/dom/MozPowerManagerBinding.h"
#include "mozilla/dom/network/Types.h"
#include "mozilla/dom/power/Types.h"
#include "mozilla/dom/ScreenOrientation.h"
#include "mozilla/hal_sandbox/PHal.h"
#include "mozilla/HalScreenConfiguration.h"
#include "mozilla/HalTypes.h"
#include "mozilla/Types.h"

/*
 * Hal.h contains the public Hal API.
 *
 * By default, this file defines its functions in the hal namespace, but if
 * MOZ_HAL_NAMESPACE is defined, we'll define our functions in that namespace.
 *
 * This is used by HalImpl.h and HalSandbox.h, which define copies of all the
 * functions here in the hal_impl and hal_sandbox namespaces.
 */

class nsPIDOMWindowInner;

#ifndef MOZ_HAL_NAMESPACE
# define MOZ_HAL_NAMESPACE hal
# define MOZ_DEFINED_HAL_NAMESPACE 1
#endif

namespace mozilla {

namespace hal {

typedef Observer<void_t> AlarmObserver;

class WindowIdentifier;

typedef Observer<int64_t> SystemClockChangeObserver;
typedef Observer<SystemTimezoneChangeInformation> SystemTimezoneChangeObserver;

} // namespace hal

namespace MOZ_HAL_NAMESPACE {

/**
 * Determine whether the device's screen is currently enabled.
 */
bool GetScreenEnabled();

/**
 * Enable or disable the device's screen.
 *
 * Note that it may take a few seconds for the screen to turn on or off.
 */
void SetScreenEnabled(bool aEnabled);

/**
 * Determine whether the device's keypad/button backlight is currently enabled.
 */
bool GetKeyLightEnabled();

/**
 * Enable or disable the device's keypad/button backlight.
 */
void SetKeyLightEnabled(bool aEnabled);

/**
 * Get the brightness of the device's screen's backlight, on a scale from 0
 * (very dim) to 1 (full blast).
 *
 * If the display is currently disabled, this returns the brightness the
 * backlight will have when the display is re-enabled.
 */
double GetScreenBrightness();

/**
 * Set the brightness of the device's screen's backlight, on a scale from 0
 * (very dimm) to 1 (full blast).  Values larger than 1 are treated like 1, and
 * values smaller than 0 are treated like 0.
 *
 * Note that we may reduce the resolution of the given brightness value before
 * sending it to the screen.  Therefore if you call SetScreenBrightness(x)
 * followed by GetScreenBrightness(), the value returned by
 * GetScreenBrightness() may not be exactly x.
 */
void SetScreenBrightness(double aBrightness);

/**
 * Determine whether the device is allowed to sleep.
 */
bool GetCpuSleepAllowed();

/**
 * Set whether the device is allowed to suspend automatically after
 * the screen is disabled.
 */
void SetCpuSleepAllowed(bool aAllowed);

/**
 * Register an observer for the sensor of given type.
 *
 * The observer will receive data whenever the data generated by the
 * sensor is avaiable.
 */
void RegisterSensorObserver(hal::SensorType aSensor,
                            hal::ISensorObserver *aObserver);

/**
 * Unregister an observer for the sensor of given type.
 */
void UnregisterSensorObserver(hal::SensorType aSensor,
                              hal::ISensorObserver *aObserver);

/**
 * Post a value generated by a sensor.
 *
 * This API is internal to hal; clients shouldn't call it directly.
 */
void NotifySensorChange(const hal::SensorData &aSensorData);

/**
 * Enable sensor notifications from the backend
 *
 * This method is only visible from implementation of sensor manager.
 * Rest of the system should not try this.
 */
void EnableSensorNotifications(hal::SensorType aSensor);

/**
 * Disable sensor notifications from the backend
 *
 * This method is only visible from implementation of sensor manager.
 * Rest of the system should not try this.
 */
void DisableSensorNotifications(hal::SensorType aSensor);


/**
 * Inform the network backend there is a new network observer.
 * @param aNetworkObserver The observer that should be added.
 */
void RegisterNetworkObserver(NetworkObserver* aNetworkObserver);

/**
 * Inform the network backend a network observer unregistered.
 * @param aNetworkObserver The observer that should be removed.
 */
void UnregisterNetworkObserver(NetworkObserver* aNetworkObserver);

/**
 * Returns the current network information.
 */
void GetCurrentNetworkInformation(hal::NetworkInformation* aNetworkInfo);

/**
 * Notify of a change in the network state.
 * @param aNetworkInfo The new network information.
 */
void NotifyNetworkChange(const hal::NetworkInformation& aNetworkInfo);

/**
 * Adjusting system clock.
 * @param aDeltaMilliseconds The difference compared with current system clock.
 */
void AdjustSystemClock(int64_t aDeltaMilliseconds);

/**
 * Set timezone
 * @param aTimezoneSpec The definition can be found in
 * http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 */
void SetTimezone(const nsCString& aTimezoneSpec);

/**
 * Get timezone
 * http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 */
nsCString GetTimezone();

/**
 * Get timezone offset
 * returns the timezone offset relative to UTC in minutes (DST effect included)
 */
int32_t GetTimezoneOffset();

/**
 * Register observer for system clock changed notification.
 * @param aObserver The observer that should be added.
 */
void RegisterSystemClockChangeObserver(
  hal::SystemClockChangeObserver* aObserver);

/**
 * Unregister the observer for system clock changed.
 * @param aObserver The observer that should be removed.
 */
void UnregisterSystemClockChangeObserver(
  hal::SystemClockChangeObserver* aObserver);

/**
 * Notify of a change in the system clock.
 * @param aClockDeltaMS
 */
void NotifySystemClockChange(const int64_t& aClockDeltaMS);

/**
 * Register observer for system timezone changed notification.
 * @param aObserver The observer that should be added.
 */
void RegisterSystemTimezoneChangeObserver(
  hal::SystemTimezoneChangeObserver* aObserver);

/**
 * Unregister the observer for system timezone changed.
 * @param aObserver The observer that should be removed.
 */
void UnregisterSystemTimezoneChangeObserver(
  hal::SystemTimezoneChangeObserver* aObserver);

/**
 * Notify of a change in the system timezone.
 * @param aSystemTimezoneChangeInfo
 */
void NotifySystemTimezoneChange(
  const hal::SystemTimezoneChangeInformation& aSystemTimezoneChangeInfo);

/**
 * Reboot the device.
 *
 * This API is currently only allowed to be used from the main process.
 */
void Reboot();

/**
 * Power off the device.
 *
 * This API is currently only allowed to be used from the main process.
 */
void PowerOff();

/**
 * Enable wake lock notifications from the backend.
 *
 * This method is only used by WakeLockObserversManager.
 */
void EnableWakeLockNotifications();

/**
 * Disable wake lock notifications from the backend.
 *
 * This method is only used by WakeLockObserversManager.
 */
void DisableWakeLockNotifications();

/**
 * Inform the wake lock backend there is a new wake lock observer.
 * @param aWakeLockObserver The observer that should be added.
 */
void RegisterWakeLockObserver(WakeLockObserver* aObserver);

/**
 * Inform the wake lock backend a wake lock observer unregistered.
 * @param aWakeLockObserver The observer that should be removed.
 */
void UnregisterWakeLockObserver(WakeLockObserver* aObserver);

/**
 * Adjust a wake lock's counts on behalf of a given process.
 *
 * In most cases, you shouldn't need to pass the aProcessID argument; the
 * default of CONTENT_PROCESS_ID_UNKNOWN is probably what you want.
 *
 * @param aTopic        lock topic
 * @param aLockAdjust   to increase or decrease active locks
 * @param aHiddenAdjust to increase or decrease hidden locks
 * @param aProcessID    indicates which process we're modifying the wake lock
 *                      on behalf of.  It is interpreted as
 *
 *                      CONTENT_PROCESS_ID_UNKNOWN: The current process
 *                      CONTENT_PROCESS_ID_MAIN: The root process
 *                      X: The process with ContentChild::GetID() == X
 */
void ModifyWakeLock(const nsAString &aTopic,
                    hal::WakeLockControl aLockAdjust,
                    hal::WakeLockControl aHiddenAdjust,
                    uint64_t aProcessID = hal::CONTENT_PROCESS_ID_UNKNOWN);

/**
 * Query the wake lock numbers of aTopic.
 * @param aTopic        lock topic
 * @param aWakeLockInfo wake lock numbers
 */
void GetWakeLockInfo(const nsAString &aTopic, hal::WakeLockInformation *aWakeLockInfo);

/**
 * Notify of a change in the wake lock state.
 * @param aWakeLockInfo The new wake lock information.
 */
void NotifyWakeLockChange(const hal::WakeLockInformation& aWakeLockInfo);

/**
 * Inform the backend there is a new screen configuration observer.
 * @param aScreenConfigurationObserver The observer that should be added.
 */
void RegisterScreenConfigurationObserver(hal::ScreenConfigurationObserver* aScreenConfigurationObserver);

/**
 * Inform the backend a screen configuration observer unregistered.
 * @param aScreenConfigurationObserver The observer that should be removed.
 */
void UnregisterScreenConfigurationObserver(hal::ScreenConfigurationObserver* aScreenConfigurationObserver);

/**
 * Returns the current screen configuration.
 */
void GetCurrentScreenConfiguration(hal::ScreenConfiguration* aScreenConfiguration);

/**
 * Notify of a change in the screen configuration.
 * @param aScreenConfiguration The new screen orientation.
 */
void NotifyScreenConfigurationChange(const hal::ScreenConfiguration& aScreenConfiguration);

/**
 * Lock the screen orientation to the specific orientation.
 * @return Whether the lock has been accepted.
 */
MOZ_MUST_USE bool LockScreenOrientation(const dom::ScreenOrientationInternal& aOrientation);

/**
 * Unlock the screen orientation.
 */
void UnlockScreenOrientation();

/**
 * Register an observer that is notified when a programmed alarm
 * expires.
 *
 * Currently, there can only be 0 or 1 alarm observers.
 */
MOZ_MUST_USE bool RegisterTheOneAlarmObserver(hal::AlarmObserver* aObserver);

/**
 * Unregister the alarm observer.  Doing so will implicitly cancel any
 * programmed alarm.
 */
void UnregisterTheOneAlarmObserver();

/**
 * Notify that the programmed alarm has expired.
 *
 * This API is internal to hal; clients shouldn't call it directly.
 */
void NotifyAlarmFired();

/**
 * Program the real-time clock to expire at the time |aSeconds|,
 * |aNanoseconds|.  These specify a point in real time relative to the
 * UNIX epoch.  The alarm will fire at this time point even if the
 * real-time clock is changed; that is, this alarm respects changes to
 * the real-time clock.  Return true iff the alarm was programmed.
 *
 * The alarm can be reprogrammed at any time.
 *
 * This API is currently only allowed to be used from non-sandboxed
 * contexts.
 */
MOZ_MUST_USE bool SetAlarm(int32_t aSeconds, int32_t aNanoseconds);

/**
 * Set the priority of the given process.
 *
 * Exactly what this does will vary between platforms.  On *nix we might give
 * background processes higher nice values.  On other platforms, we might
 * ignore this call entirely.
 */
void SetProcessPriority(int aPid,
                        hal::ProcessPriority aPriority,
                        uint32_t aLRU = 0);


/**
 * Set the current thread's priority to appropriate platform-specific value for
 * given functionality. Instead of providing arbitrary priority numbers you
 * must specify a type of function like THREAD_PRIORITY_COMPOSITOR.
 */
void SetCurrentThreadPriority(hal::ThreadPriority aThreadPriority);

/**
 * Set a thread priority to appropriate platform-specific value for
 * given functionality. Instead of providing arbitrary priority numbers you
 * must specify a type of function like THREAD_PRIORITY_COMPOSITOR.
 */
void SetThreadPriority(PlatformThreadId aThreadId,
                       hal::ThreadPriority aThreadPriority);

/**
 * Start a watchdog to compulsively shutdown the system if it hangs.
 * @param aMode Specify how to shutdown the system.
 * @param aTimeoutSecs Specify the delayed seconds to shutdown the system.
 *
 * This API is currently only allowed to be used from the main process.
 */
void StartForceQuitWatchdog(hal::ShutdownMode aMode, int32_t aTimeoutSecs);

/**
 * Perform Factory Reset to wipe out all user data.
 */
void FactoryReset(mozilla::dom::FactoryResetReason& aReason);

/**
 * Get total system memory of device being run on in bytes.
 *
 * Returns 0 if we are unable to determine this information from /proc/meminfo.
 */
uint32_t GetTotalSystemMemory();

/**
 * Determine whether the headphone switch event is from input device
 */
bool IsHeadphoneEventFromInputDev();

/**
 * Start the system service with the specified name and arguments.
 */
nsresult StartSystemService(const char* aSvcName, const char* aArgs);

/**
 * Stop the system service with the specified name.
 */
void StopSystemService(const char* aSvcName);

/**
 * Determine whether the system service with the specified name is running.
 */
bool SystemServiceIsRunning(const char* aSvcName);

} // namespace MOZ_HAL_NAMESPACE
} // namespace mozilla

#ifdef MOZ_DEFINED_HAL_NAMESPACE
# undef MOZ_DEFINED_HAL_NAMESPACE
# undef MOZ_HAL_NAMESPACE
#endif

#endif  // mozilla_Hal_h