C++ nsTArray::RemoveElementAt方法代码示例

static void
BondStateChangedCallback(bt_status_t aStatus, bt_bdaddr_t* aRemoteBdAddress,
                         bt_bond_state_t aState)
{
  MOZ_ASSERT(!NS_IsMainThread());

  nsAutoString remoteAddress;
  BdAddressTypeToString(aRemoteBdAddress, remoteAddress);

  // We don't need to handle bonding state
  NS_ENSURE_TRUE_VOID(aState != BT_BOND_STATE_BONDING);
  NS_ENSURE_FALSE_VOID(aState == BT_BOND_STATE_BONDED &&
                       sAdapterBondedAddressArray.Contains(remoteAddress));
  bool bonded;
  if (aState == BT_BOND_STATE_NONE) {
    bonded = false;
    sAdapterBondedAddressArray.RemoveElement(remoteAddress);
  } else if (aState == BT_BOND_STATE_BONDED) {
    bonded = true;
    sAdapterBondedAddressArray.AppendElement(remoteAddress);
  }

  // Update bonded address list to BluetoothAdapter
  InfallibleTArray<BluetoothNamedValue> propertiesChangeArray;
  propertiesChangeArray.AppendElement(
    BluetoothNamedValue(NS_LITERAL_STRING("Devices"),
                        sAdapterBondedAddressArray));
  BluetoothValue value(propertiesChangeArray);
  BluetoothSignal signal(NS_LITERAL_STRING("PropertyChanged"),
                         NS_LITERAL_STRING(KEY_ADAPTER),
                         BluetoothValue(propertiesChangeArray));
  NS_DispatchToMainThread(new DistributeBluetoothSignalTask(signal));

  // Update bonding status to gaia
  InfallibleTArray<BluetoothNamedValue> propertiesArray;
  propertiesArray.AppendElement(
    BluetoothNamedValue(NS_LITERAL_STRING("address"), remoteAddress));
  propertiesArray.AppendElement(
    BluetoothNamedValue(NS_LITERAL_STRING("status"), bonded));
  BluetoothSignal newSignal(NS_LITERAL_STRING(PAIRED_STATUS_CHANGED_ID),
                            NS_LITERAL_STRING(KEY_ADAPTER),
                            BluetoothValue(propertiesArray));
  NS_DispatchToMainThread(new DistributeBluetoothSignalTask(newSignal));

  if (bonded && !sBondingRunnableArray.IsEmpty()) {
    DispatchBluetoothReply(sBondingRunnableArray[0],
                           BluetoothValue(true), EmptyString());

    sBondingRunnableArray.RemoveElementAt(0);
  } else if (!bonded && !sUnbondingRunnableArray.IsEmpty()) {
    DispatchBluetoothReply(sUnbondingRunnableArray[0],
                           BluetoothValue(true), EmptyString());

    sUnbondingRunnableArray.RemoveElementAt(0);
  }
}

nsresult
PendingLookup::LookupNext()
{
  // We must call LookupNext or SendRemoteQuery upon return.
  // Look up all of the URLs that could allow or block this download.
  // Blocklist first.
  if (mBlocklistCount > 0) {
    return OnComplete(true, NS_OK);
  }
  int index = mAnylistSpecs.Length() - 1;
  nsCString spec;
  if (index >= 0) {
    // Check the source URI, referrer and redirect chain.
    spec = mAnylistSpecs[index];
    mAnylistSpecs.RemoveElementAt(index);
    nsRefPtr<PendingDBLookup> lookup(new PendingDBLookup(this));
    return lookup->LookupSpec(spec, false);
  }
  // If any of mAnylistSpecs matched the blocklist, go ahead and block.
  if (mBlocklistCount > 0) {
    return OnComplete(true, NS_OK);
  }
  // If any of mAnylistSpecs matched the allowlist, go ahead and pass.
  if (mAllowlistCount > 0) {
    return OnComplete(false, NS_OK);
  }
  // Only binary signatures remain.
  index = mAllowlistSpecs.Length() - 1;
  if (index >= 0) {
    spec = mAllowlistSpecs[index];
    LOG(("PendingLookup::LookupNext: checking %s on allowlist", spec.get()));
    mAllowlistSpecs.RemoveElementAt(index);
    nsRefPtr<PendingDBLookup> lookup(new PendingDBLookup(this));
    return lookup->LookupSpec(spec, true);
  }
#ifdef XP_WIN
  // There are no more URIs to check against local list. If the file is
  // not eligible for remote lookup, bail.
  if (!IsBinaryFile()) {
    LOG(("Not eligible for remote lookups [this=%x]", this));
    return OnComplete(false, NS_OK);
  }
  // Send the remote query if we are on Windows.
  nsresult rv = SendRemoteQuery();
  if (NS_FAILED(rv)) {
    return OnComplete(false, rv);
  }
  return NS_OK;
#else
  LOG(("PendingLookup: Nothing left to check [this=%p]", this));
  return OnComplete(false, NS_OK);
#endif
}

nsresult NameSpaceManagerImpl::AddNameSpace(const nsAString& aURI,
                                            const PRInt32 aNameSpaceID)
{
  if (aNameSpaceID < 0) {
    // We've wrapped...  Can't do anything else here; just bail.
    return NS_ERROR_OUT_OF_MEMORY;
  }
  
  NS_ASSERTION(aNameSpaceID - 1 == (PRInt32) mURIArray.Length(),
               "BAD! AddNameSpace not called in right order!");

  nsString* uri = new nsString(aURI);
  if (!uri || !mURIArray.AppendElement(uri)) {
    delete uri;
    return NS_ERROR_OUT_OF_MEMORY;
  }

  if (!mURIToIDTable.Put(uri, aNameSpaceID)) {
    mURIArray.RemoveElementAt(aNameSpaceID - 1);

    return NS_ERROR_OUT_OF_MEMORY;
  }

  return NS_OK;
}

void
WindowsGamepadService::ScanForDevices()
{
  for (int i = mGamepads.Length() - 1; i >= 0; i--) {
    mGamepads[i].present = false;
  }

  if (mHID) {
    ScanForRawInputDevices();
  }
  if (mXInput) {
    mXInputPollTimer->Cancel();
    if (ScanForXInputDevices()) {
      mXInputPollTimer->InitWithFuncCallback(XInputPollTimerCallback,
                                             this,
                                             kXInputPollInterval,
                                             nsITimer::TYPE_REPEATING_SLACK);
    }
  }

  // Look for devices that are no longer present and remove them.
  for (int i = mGamepads.Length() - 1; i >= 0; i--) {
    if (!mGamepads[i].present) {
      RemoveGamepad(mGamepads[i].id);
      mGamepads.RemoveElementAt(i);
    }
  }
}

/**
 * AdapterPropertiesNotification will be called after enable() but
 * before AdapterStateChangeNotification is called. At that moment,
 * BluetoothManager and BluetoothAdapter, do not register observer
 * yet.
 */
void
BluetoothServiceBluedroid::AdapterPropertiesNotification(
  BluetoothStatus aStatus, int aNumProperties,
  const BluetoothProperty* aProperties)
{
  MOZ_ASSERT(NS_IsMainThread());

  InfallibleTArray<BluetoothNamedValue> propertiesArray;

  for (int i = 0; i < aNumProperties; i++) {

    const BluetoothProperty& p = aProperties[i];

    if (p.mType == PROPERTY_BDADDR) {
      sAdapterBdAddress = p.mString;
      BT_APPEND_NAMED_VALUE(propertiesArray, "Address", sAdapterBdAddress);

    } else if (p.mType == PROPERTY_BDNAME) {
      sAdapterBdName = p.mString;
      BT_APPEND_NAMED_VALUE(propertiesArray, "Name", sAdapterBdName);

    } else if (p.mType == PROPERTY_ADAPTER_SCAN_MODE) {
      sAdapterDiscoverable =
        (p.mScanMode == SCAN_MODE_CONNECTABLE_DISCOVERABLE);
      BT_APPEND_NAMED_VALUE(propertiesArray, "Discoverable",
                            sAdapterDiscoverable);

    } else if (p.mType == PROPERTY_ADAPTER_BONDED_DEVICES) {
      // We have to cache addresses of bonded devices. Unlike BlueZ,
      // Bluedroid would not send another PROPERTY_ADAPTER_BONDED_DEVICES
      // event after bond completed.
      BT_LOGD("Adapter property: BONDED_DEVICES. Count: %d",
              p.mStringArray.Length());

      // Whenever reloading paired devices, force refresh
      sAdapterBondedAddressArray.Clear();
      sAdapterBondedAddressArray.AppendElements(p.mStringArray);

      BT_APPEND_NAMED_VALUE(propertiesArray, "PairedDevices",
                            sAdapterBondedAddressArray);
    } else if (p.mType == PROPERTY_UNKNOWN) {
      /* Bug 1065999: working around unknown properties */
    } else {
      BT_LOGD("Unhandled adapter property type: %d", p.mType);
      continue;
    }
  }

  NS_ENSURE_TRUE_VOID(propertiesArray.Length() > 0);

  DistributeSignal(NS_LITERAL_STRING("PropertyChanged"),
                   NS_LITERAL_STRING(KEY_ADAPTER),
                   BluetoothValue(propertiesArray));

  // Send reply for SetProperty
  if (!sSetPropertyRunnableArray.IsEmpty()) {
    DispatchReplySuccess(sSetPropertyRunnableArray[0]);
    sSetPropertyRunnableArray.RemoveElementAt(0);
  }
}

 static void DestroyLast(nsTArray<nsEventTargetChainItem>& aChain,
                         nsEventTargetChainItem* aItem)
 {
   uint32_t lastIndex = aChain.Length() - 1;
   MOZ_ASSERT(&aChain[lastIndex] == aItem);
   aChain.RemoveElementAt(lastIndex);
 }

nsresult
ICameraControl::GetListOfCameras(nsTArray<nsString>& aList)
{
  int32_t count = android::Camera::getNumberOfCameras();
  DOM_CAMERA_LOGI("getListOfCameras : getNumberOfCameras() returned %d\n", count);
  if (count <= 0) {
    aList.Clear();
    return NS_OK;
  }

  // Allocate 2 extra slots to reserve space for 'front' and 'back' cameras
  // at the front of the array--we will collapse any empty slots below.
  aList.SetLength(2);
  uint32_t extraIdx = 2;
  bool gotFront = false;
  bool gotBack = false;
  while (count--) {
    nsCString cameraName;
    nsresult result = GetCameraName(count, cameraName);
    if (result != NS_OK) {
      continue;
    }

    // The first camera we find named 'back' gets slot 0; and the first
    // we find named 'front' gets slot 1.  All others appear after these.
    if (cameraName.EqualsLiteral("back")) {
      CopyUTF8toUTF16(cameraName, aList[0]);
      gotBack = true;
    } else if (cameraName.EqualsLiteral("front")) {
      CopyUTF8toUTF16(cameraName, aList[1]);
      gotFront = true;
    } else {
      CopyUTF8toUTF16(cameraName, *aList.InsertElementAt(extraIdx));
      extraIdx++;
    }
  }

  if (!gotFront) {
    aList.RemoveElementAt(1);
  }

  if (!gotBack) {
    aList.RemoveElementAt(0);
  }

  return NS_OK;
}

  void OnError(BluetoothStatus aStatus) override
  {
    MOZ_ASSERT(NS_IsMainThread());

    BT_WARNING("GetRemoteDeviceProperties(%s) failed: %d",
               NS_ConvertUTF16toUTF8(mDeviceAddress).get(), aStatus);

    /* dispatch result after final pending operation */
    if (--sRequestedDeviceCountArray[0] == 0) {
      if (!sGetDeviceRunnableArray.IsEmpty()) {
        DispatchReplyError(sGetDeviceRunnableArray[0],
          NS_LITERAL_STRING("GetRemoteDeviceProperties failed"));
        sGetDeviceRunnableArray.RemoveElementAt(0);
      }

      sRequestedDeviceCountArray.RemoveElementAt(0);
      sRemoteDevicesPack.Clear();
    }
  }

static void
NextBluetoothProfileController()
{
  sControllerArray[0] = nullptr;
  sControllerArray.RemoveElementAt(0);

  if (!sControllerArray.IsEmpty()) {
    sControllerArray[0]->Start();
  }
}

static void
NextBluetoothProfileController()
{
  MOZ_ASSERT(NS_IsMainThread());

  // First, remove the task at the front which has been already done.
  NS_ENSURE_FALSE_VOID(sControllerArray.IsEmpty());
  sControllerArray.RemoveElementAt(0);
  // Re-check if the task array is empty, if it's not, the next task will begin.
  NS_ENSURE_FALSE_VOID(sControllerArray.IsEmpty());
  sControllerArray[0]->StartSession();
}

NS_IMETHODIMP
nsCommandLine::RemoveArguments(int32_t aStart, int32_t aEnd)
{
  NS_ENSURE_ARG_MIN(aStart, 0);
  NS_ENSURE_ARG_MAX(uint32_t(aEnd) + 1, mArgs.Length());

  for (int32_t i = aEnd; i >= aStart; --i) {
    mArgs.RemoveElementAt(i);
  }

  return NS_OK;
}

static void
DiscoveryStateChangedCallback(bt_discovery_state_t aState)
{
  MOZ_ASSERT(!NS_IsMainThread());

  if (!sChangeDiscoveryRunnableArray.IsEmpty()) {
    BluetoothValue values(true);
    DispatchBluetoothReply(sChangeDiscoveryRunnableArray[0],
                           values, EmptyString());

    sChangeDiscoveryRunnableArray.RemoveElementAt(0);
  }
}

void
BluetoothServiceBluedroid::NextBluetoothProfileController()
{
  MOZ_ASSERT(NS_IsMainThread());

  // Remove the completed task at the head
  NS_ENSURE_FALSE_VOID(sControllerArray.IsEmpty());
  sControllerArray.RemoveElementAt(0);

  // Start the next task if task array is not empty
  if (!sControllerArray.IsEmpty()) {
    sControllerArray[0]->StartSession();
  }
}

void
DBusWatcher::HandleWatchRemove()
{
  int fd;
  ssize_t res = TEMP_FAILURE_RETRY(read(mControlFdR.get(), &fd, sizeof(fd)));
  if (res < 0) {
    LOG("Cannot read DBus watch remove descriptor data from socket!\n");
    return;
  }

  unsigned int flags;
  res = TEMP_FAILURE_RETRY(read(mControlFdR.get(), &flags, sizeof(flags)));
  if (res < 0) {
    LOG("Cannot read DBus watch remove flag data from socket!\n");
    return;
  }

  struct pollfd p = {
    fd, // .fd
    DBusFlagsToUnixEvents(flags), // .events
    0 // .revents
  };
  int index = mPollData.IndexOf(p, 0, PollFdComparator());
  // There are times where removes can be requested for watches that
  // haven't been added (for example, whenever gecko comes up after
  // adapters have already been enabled), so check to make sure we're
  // using the watch in the first place
  if (index < 0) {
    LOG("DBus requested watch removal of non-existant socket, ignoring...");
    return;
  }
  mPollData.RemoveElementAt(index);

  // DBusWatch pointers are maintained by DBus, so we won't leak by
  // removing.
  mWatchData.RemoveElementAt(index);
}

template<class T> static void
DoDeferredRelease(nsTArray<T> &array)
{
    while(1)
    {
        PRUint32 count = array.Length();
        if(!count)
        {
            array.Compact();
            break;
        }
        T wrapper = array[count-1];
        array.RemoveElementAt(count-1);
        NS_RELEASE(wrapper);
    }
}