The Tor Browser: hal/Hal.h@97036ab72558 (annotated)

hal/Hal.h@97036ab72558 (annotated)

hal/Hal.h

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set sw=2 ts=8 et ft=cpp : */
 /* 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 "mozilla/hal_sandbox/PHal.h"
 #include "mozilla/HalTypes.h"
 #include "base/basictypes.h"
 #include "mozilla/Observer.h"
 #include "mozilla/Types.h"
 #include "nsTArray.h"
 #include "prlog.h"
 #include "mozilla/dom/battery/Types.h"
 #include "mozilla/dom/network/Types.h"
 #include "mozilla/dom/power/Types.h"
 #include "mozilla/hal_sandbox/PHal.h"
 #include "mozilla/dom/ScreenOrientation.h"
 #include "mozilla/HalScreenConfiguration.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 nsIDOMWindow;
 #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;
 extern PRLogModuleInfo *GetHalLog();
 #define HAL_LOG(msg) PR_LOG(mozilla::hal::GetHalLog(), PR_LOG_DEBUG, msg)
 typedef Observer<int64_t> SystemClockChangeObserver;
 typedef Observer<SystemTimezoneChangeInformation> SystemTimezoneChangeObserver;
 } // namespace hal
 namespace MOZ_HAL_NAMESPACE {
 /**
  * Turn the default vibrator device on/off per the pattern specified
  * by |pattern|.  Each element in the pattern is the number of
  * milliseconds to turn the vibrator on or off.  The first element in
  * |pattern| is an "on" element, the next is "off", and so on.
  *
  * If |pattern| is empty, any in-progress vibration is canceled.
  *
  * Only an active window within an active tab may call Vibrate; calls
  * from inactive windows and windows on inactive tabs do nothing.
  *
  * If you're calling hal::Vibrate from the outside world, pass an
  * nsIDOMWindow* in place of the WindowIdentifier parameter.
  * The method with WindowIdentifier will be called automatically.
  */
 void Vibrate(const nsTArray<uint32_t>& pattern,
              nsIDOMWindow* aWindow);
 void Vibrate(const nsTArray<uint32_t>& pattern,
              const hal::WindowIdentifier &id);
 /**
  * Cancel a vibration started by the content window identified by
  * WindowIdentifier.
  *
  * If the window was the last window to start a vibration, the
  * cancellation request will go through even if the window is not
  * active.
  *
  * As with hal::Vibrate(), if you're calling hal::CancelVibrate from the outside
  * world, pass an nsIDOMWindow*. The method with WindowIdentifier will be called
  * automatically.
  */
 void CancelVibrate(nsIDOMWindow* aWindow);
 void CancelVibrate(const hal::WindowIdentifier &id);
 /**
  * Inform the battery backend there is a new battery observer.
  * @param aBatteryObserver The observer that should be added.
  */
 void RegisterBatteryObserver(BatteryObserver* aBatteryObserver);
 /**
  * Inform the battery backend a battery observer unregistered.
  * @param aBatteryObserver The observer that should be removed.
  */
 void UnregisterBatteryObserver(BatteryObserver* aBatteryObserver);
 /**
  * Returns the current battery information.
  */
 void GetCurrentBatteryInformation(hal::BatteryInformation* aBatteryInfo);
 /**
  * Notify of a change in the battery state.
  * @param aBatteryInfo The new battery information.
  */
 void NotifyBatteryChange(const hal::BatteryInformation& aBatteryInfo);
 /**
  * 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 enabled);
 /**
  * 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 brightness);
 /**
  * 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 allowed);
 /**
  * Set the value of a light to a particular color, with a specific flash pattern.
  * light specifices which light.  See Hal.idl for the list of constants
  * mode specifies user set or based on ambient light sensor
  * flash specifies whether or how to flash the light
  * flashOnMS and flashOffMS specify the pattern for XXX flash mode
  * color specifies the color.  If the light doesn't support color, the given color is
  * transformed into a brightness, or just an on/off if that is all the light is capable of.
  * returns true if successful and false if failed.
  */
 bool SetLight(hal::LightType light, const hal::LightConfiguration& aConfig);
 /**
  * GET the value of a light returning a particular color, with a specific flash pattern.
  * returns true if successful and false if failed.
  */
 bool GetLight(hal::LightType light, hal::LightConfiguration* aConfig);
 /**
  * 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.
  */
 bool LockScreenOrientation(const dom::ScreenOrientation& aOrientation);
 /**
  * Unlock the screen orientation.
  */
 void UnlockScreenOrientation();
 /**
  * Register an observer for the switch of given SwitchDevice.
  *
  * The observer will receive data whenever the data generated by the
  * given switch.
  */
 void RegisterSwitchObserver(hal::SwitchDevice aDevice, hal::SwitchObserver *aSwitchObserver);
 /**
  * Unregister an observer for the switch of given SwitchDevice.
  */
 void UnregisterSwitchObserver(hal::SwitchDevice aDevice, hal::SwitchObserver *aSwitchObserver);
 /**
  * Notify the state of the switch.
  *
  * This API is internal to hal; clients shouldn't call it directly.
  */
 void NotifySwitchChange(const hal::SwitchEvent& aEvent);
 /**
  * Get current switch information.
  */
 hal::SwitchState GetCurrentSwitchState(hal::SwitchDevice aDevice);
 /**
  * Notify switch status change from input device.
  */
 void NotifySwitchStateFromInputDevice(hal::SwitchDevice aDevice,
                                       hal::SwitchState aState);
 /**
  * Register an observer that is notified when a programmed alarm
  * expires.
  *
  * Currently, there can only be 0 or 1 alarm observers.
  */
 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.
  */
 bool SetAlarm(int32_t aSeconds, int32_t aNanoseconds);
 /**
  * Set the priority of the given process.  A process's priority is a two-tuple
  * consisting of a hal::ProcessPriority value and a hal::ProcessCPUPriority
  * value.
  *
  * Two processes with the same ProcessCPUPriority value don't necessarily have
  * the same CPU priority; the CPU priority we assign to a process is a function
  * of its ProcessPriority and ProcessCPUPriority.
  *
  * 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,
                         hal::ProcessCPUPriority aCPUPriority,
                         uint32_t aLRU = 0);
 /**
  * Register an observer for the FM radio.
  */
 void RegisterFMRadioObserver(hal::FMRadioObserver* aRadioObserver);
 /**
  * Unregister the observer for the FM radio.
  */
 void UnregisterFMRadioObserver(hal::FMRadioObserver* aRadioObserver);
 /**
  * Notify observers that a call to EnableFMRadio, DisableFMRadio, or FMRadioSeek
  * has completed, and indicate what the call returned.
  */
 void NotifyFMRadioStatus(const hal::FMRadioOperationInformation& aRadioState);
 /**
  * Enable the FM radio and configure it according to the settings in aInfo.
  */
 void EnableFMRadio(const hal::FMRadioSettings& aInfo);
 /**
  * Disable the FM radio.
  */
 void DisableFMRadio();
 /**
  * Seek to an available FM radio station.
  *
  */
 void FMRadioSeek(const hal::FMRadioSeekDirection& aDirection);
 /**
  * Get the current FM radio settings.
  */
 void GetFMRadioSettings(hal::FMRadioSettings* aInfo);
 /**
  * Set the FM radio's frequency.
  */
 void SetFMRadioFrequency(const uint32_t frequency);
 /**
  * Get the FM radio's frequency.
  */
 uint32_t GetFMRadioFrequency();
 /**
  * Get FM radio power state
  */
 bool IsFMRadioOn();
 /**
  * Get FM radio signal strength
  */
 uint32_t GetFMRadioSignalStrength();
 /**
  * Cancel FM radio seeking
  */
 void CancelFMRadioSeek();
 /**
  * Get FM radio band settings by country.
  */
 hal::FMRadioSettings GetFMBandSettings(hal::FMRadioCountry aCountry);
 /**
  * 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();
 /**
  * Start monitoring the status of gamepads attached to the system.
  */
 void StartMonitoringGamepadStatus();
 /**
  * Stop monitoring the status of gamepads attached to the system.
  */
 void StopMonitoringGamepadStatus();
 /**
  * Start monitoring disk space for low space situations.
  *
  * This API is currently only allowed to be used from the main process.
  */
 void StartDiskSpaceWatcher();
 /**
  * Stop monitoring disk space for low space situations.
  *
  * This API is currently only allowed to be used from the main process.
  */
 void StopDiskSpaceWatcher();
 /**
  * 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();
 } // 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

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hal/Hal.h@97036ab72558 (annotated)

hal/Hal.h