hal/Hal.h
author Gregory Szorc <gps@mozilla.com>
Thu, 19 Feb 2015 10:58:41 -0800
changeset 245738 c97c977c92b97c9585011651b13a088f0cd4ed4f
parent 210375 5f053be160fb41543c72b7074b48381393a30f85
child 246625 44e25e482ff46ebc94ccc4dd3f0cb9443136e029
permissions -rw-r--r--
Bug 1132771 - moz.build fixups to enable execution in no config mode Various moz.build files fail to execute when a build config is not present. Many of these are due to assuming certain CONFIG entries are present. This patch attempts to fix that and enable every moz.build to be read without a build config.

/* -*- 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 "mozilla/dom/MozPowerManagerBinding.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;

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 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.
 */
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);


/**
 * 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);

/**
 * Register an observer for the FM radio.
 */
void RegisterFMRadioObserver(hal::FMRadioObserver* aRadioObserver);

/**
 * Unregister the observer for the FM radio.
 */
void UnregisterFMRadioObserver(hal::FMRadioObserver* aRadioObserver);

/**
 * Register an observer for the FM radio.
 */
void RegisterFMRadioRDSObserver(hal::FMRadioRDSObserver* aRDSObserver);

/**
 * Unregister the observer for the FM radio.
 */
void UnregisterFMRadioRDSObserver(hal::FMRadioRDSObserver* aRDSObserver);

/**
 * Notify observers that a call to EnableFMRadio, DisableFMRadio, or FMRadioSeek
 * has completed, and indicate what the call returned.
 */
void NotifyFMRadioStatus(const hal::FMRadioOperationInformation& aRadioState);

/**
 * Notify observers of new RDS data
 * This can be called on any thread.
 */
void NotifyFMRadioRDSGroup(const hal::FMRadioRDSGroup& aRDSGroup);

/**
 * 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.
 *
 * This can be called off main thread, but all calls must be completed
 * before calling DisableFMRadio.
 */
void FMRadioSeek(const hal::FMRadioSeekDirection& aDirection);

/**
 * Get the current FM radio settings.
 */
void GetFMRadioSettings(hal::FMRadioSettings* aInfo);

/**
 * Set the FM radio's frequency.
 *
 * This can be called off main thread, but all calls must be completed
 * before calling DisableFMRadio.
 */
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);

/**
 * Enable RDS data reception
 */
bool EnableRDS(uint32_t aMask);

/**
 * Disable RDS data reception
 */
void DisableRDS();

/**
 * 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);

/**
 * 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();

/**
 * Get the level of total system memory on device in MiB.
 * (round the value up to the next power of two)
 *
 * Returns 0 if we are unable to determine this information from /proc/meminfo.
 */
uint32_t GetTotalSystemMemoryLevel();

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

} // 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