hal/Hal.h
author Narcis Beleuzu <nbeleuzu@mozilla.com>
Fri, 12 Jan 2018 11:32:58 +0200
changeset 450785 c011bb60725113e3da91a813b8ef250cf2109b3d
parent 421907 df3915693fa3bec56bacc17a4f2588f99ab635b4
child 463222 6e032627821402c26a1cacf6043ba48c260b409c
permissions -rw-r--r--
Backed out 5 changesets (bug 1418425) for windows build bustage "mbsdiff.exe : fatal error LNK1120". on a CLOSED TREE Backed out changeset 8154486d3e00 (bug 1418425) Backed out changeset d32ae48690a7 (bug 1418425) Backed out changeset 772538a846cb (bug 1418425) Backed out changeset 29fd023f999f (bug 1418425) Backed out changeset 218077e82115 (bug 1418425)

/* -*- 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 "base/basictypes.h"
#include "base/platform_thread.h"
#include "nsTArray.h"
#include "mozilla/dom/battery/Types.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/Observer.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 {

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,
             nsPIDOMWindowInner* 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(nsPIDOMWindowInner* 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);

/**
 * 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);

/**
 * 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);

/**
 * 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 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);

/**
 * Return true if the current platform supports the setting of process
 * priority.
 */
bool SetProcessPrioritySupported();

/**
 * 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);


/**
 * 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 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();

} // 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