C++ AssertComRCReturnRC函數代碼示例

/**
 *  Called by setter methods of all USB device filters.
 *
 *  @note Locks nothing.
 */
HRESULT USBController::onDeviceFilterChange (USBDeviceFilter *aFilter,
                                             BOOL aActiveChanged /* = FALSE */)
{
    AutoCaller autoCaller(this);
    AssertComRCReturnRC(autoCaller.rc());

    /* we need the machine state */
    AutoAnyStateDependency adep(m->pParent);
    AssertComRCReturnRC(adep.rc());

    /* nothing to do if the machine isn't running */
    if (!Global::IsOnline (adep.machineState()))
        return S_OK;

    /* we don't modify our data fields -- no need to lock */

    if (    aFilter->mInList
         && m->pParent->isRegistered())
    {
        USBProxyService *service = m->pHost->usbProxyService();
        ComAssertRet(service, E_FAIL);

        if (aActiveChanged)
        {
            if (aFilter->getData().mRemote.isMatch (false))
            {
                /* insert/remove the filter from the proxy */
                if (aFilter->getData().mActive)
                {
                    ComAssertRet(aFilter->getId() == NULL, E_FAIL);
                    aFilter->getId() = service->insertFilter(&aFilter->getData().mUSBFilter);
                }
                else
                {
                    ComAssertRet(aFilter->getId() != NULL, E_FAIL);
                    service->removeFilter(aFilter->getId());
                    aFilter->getId() = NULL;
                }
            }
        }
        else
        {
            if (aFilter->getData().mActive)
            {
                /* update the filter in the proxy */
                ComAssertRet(aFilter->getId() != NULL, E_FAIL);
                service->removeFilter(aFilter->getId());
                if (aFilter->getData().mRemote.isMatch (false))
                {
                    aFilter->getId() = service->insertFilter(&aFilter->getData().mUSBFilter);
                }
            }
        }
    }

    return S_OK;
}

/**
 * Signals that the current operation is successfully completed and advances to
 * the next operation. The operation percentage is reset to 0.
 *
 * @param aOperationDescription     Description of the next operation.
 *
 * @note The current operation must not be the last one.
 */
STDMETHODIMP Progress::SetNextOperation(IN_BSTR bstrNextOperationDescription, ULONG ulNextOperationsWeight)
{
    AssertReturn(bstrNextOperationDescription, E_INVALIDARG);

    AutoCaller autoCaller(this);
    AssertComRCReturnRC(autoCaller.rc());

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    if (mCanceled)
        return E_FAIL;
    AssertReturn(!mCompleted, E_FAIL);
    AssertReturn(m_ulCurrentOperation + 1 < m_cOperations, E_FAIL);

    ++m_ulCurrentOperation;
    m_ulOperationsCompletedWeight += m_ulCurrentOperationWeight;

    m_bstrOperationDescription = bstrNextOperationDescription;
    m_ulCurrentOperationWeight = ulNextOperationsWeight;
    m_ulOperationPercent = 0;

    Log(("Progress::setNextOperation(%ls): ulNextOperationsWeight = %d; m_ulCurrentOperation is now %d, m_ulOperationsCompletedWeight is now %d\n",
         m_bstrOperationDescription.raw(), ulNextOperationsWeight, m_ulCurrentOperation, m_ulOperationsCompletedWeight));

    /* wake up all waiting threads */
    if (mWaitersCount > 0)
        RTSemEventMultiSignal(mCompletedSem);

    return S_OK;
}

/**
 *  Initializes the Serial Port object given another serial port object
 *  (a kind of copy constructor). This object shares data with
 *  the object passed as an argument.
 *
 *  @note This object must be destroyed before the original object
 *  it shares data with is destroyed.
 *
 *  @note Locks @a aThat object for reading.
 */
HRESULT SerialPort::init(Machine *aParent, SerialPort *aThat)
{
    LogFlowThisFunc(("aParent=%p, aThat=%p\n", aParent, aThat));

    ComAssertRet(aParent && aThat, E_INVALIDARG);

    /* Enclose the state transition NotReady->InInit->Ready */
    AutoInitSpan autoInitSpan(this);
    AssertReturn(autoInitSpan.isOk(), E_FAIL);

    m = new Data();

    unconst(m->pMachine) = aParent;
    unconst(m->pPeer) = aThat;

    AutoCaller thatCaller (aThat);
    AssertComRCReturnRC(thatCaller.rc());

    AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
    m->bd.share (aThat->m->bd);

    /* Confirm a successful initialization */
    autoInitSpan.setSucceeded();

    return S_OK;
}

HRESULT USBDeviceFilters::createDeviceFilter(const com::Utf8Str &aName,
                                             ComPtr<IUSBDeviceFilter> &aFilter)

{
#ifdef VBOX_WITH_USB

    /* the machine needs to be mutable */
    AutoMutableStateDependency adep(m->pParent);
    if (FAILED(adep.rc())) return adep.rc();

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    ComObjPtr<USBDeviceFilter> pFilter;
    pFilter.createObject();
    HRESULT rc = pFilter->init(this, Bstr(aName).raw());
    ComAssertComRCRetRC(rc);
    rc = pFilter.queryInterfaceTo(aFilter.asOutParam());
    AssertComRCReturnRC(rc);

    return S_OK;
#else
    NOREF(aName);
    NOREF(aFilter);
    ReturnComNotImplemented();
#endif
}

/**
 *  Loads settings from the given machine node.
 *  May be called once right after this object creation.
 *
 *  @param aMachineNode <Machine> node.
 *
 *  @note Does not lock "this" as Machine::loadHardware, which calls this, does not lock either.
 */
HRESULT USBDeviceFilters::i_loadSettings(const settings::USB &data)
{
    AutoCaller autoCaller(this);
    AssertComRCReturnRC(autoCaller.rc());

    /* Note: we assume that the default values for attributes of optional
     * nodes are assigned in the Data::Data() constructor and don't do it
     * here. It implies that this method may only be called after constructing
     * a new USBDeviceFilters object while all its data fields are in the default
     * values. Exceptions are fields whose creation time defaults don't match
     * values that should be applied when these fields are not explicitly set
     * in the settings file (for backwards compatibility reasons). This takes
     * place when a setting of a newly created object must default to A while
     * the same setting of an object loaded from the old settings file must
     * default to B. */

#ifdef VBOX_WITH_USB
    for (settings::USBDeviceFiltersList::const_iterator it = data.llDeviceFilters.begin();
         it != data.llDeviceFilters.end();
         ++it)
    {
        const settings::USBDeviceFilter &f = *it;
        ComObjPtr<USBDeviceFilter> pFilter;
        pFilter.createObject();
        HRESULT rc = pFilter->init(this,        // parent
                                   f);
        if (FAILED(rc)) return rc;

        m->llDeviceFilters->push_back(pFilter);
        pFilter->mInList = true;
    }
#endif /* VBOX_WITH_USB */

    return S_OK;
}

STDMETHODIMP USBController::CreateDeviceFilter (IN_BSTR aName,
                                                IUSBDeviceFilter **aFilter)
{
#ifdef VBOX_WITH_USB
    CheckComArgOutPointerValid(aFilter);

    CheckComArgStrNotEmptyOrNull(aName);

    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    /* the machine needs to be mutable */
    AutoMutableStateDependency adep(m->pParent);
    if (FAILED(adep.rc())) return adep.rc();

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    ComObjPtr<USBDeviceFilter> filter;
    filter.createObject();
    HRESULT rc = filter->init (this, aName);
    ComAssertComRCRetRC (rc);
    rc = filter.queryInterfaceTo(aFilter);
    AssertComRCReturnRC(rc);

    return S_OK;
#else
    NOREF(aName);
    NOREF(aFilter);
    ReturnComNotImplemented();
#endif
}

/**
 *  Initializes the medium attachment object given another guest object
 *  (a kind of copy constructor). This object makes a private copy of data
 *  of the original object passed as an argument.
 */
HRESULT MediumAttachment::initCopy(Machine *aParent, MediumAttachment *aThat)
{
    LogFlowThisFunc(("aParent=%p, aThat=%p\n", aParent, aThat));

    ComAssertRet(aParent && aThat, E_INVALIDARG);

    /* Enclose the state transition NotReady->InInit->Ready */
    AutoInitSpan autoInitSpan(this);
    AssertReturn(autoInitSpan.isOk(), E_FAIL);

    m = new Data(aParent);
    /* m->pPeer is left null */

    AutoCaller thatCaller(aThat);
    AssertComRCReturnRC(thatCaller.rc());

    AutoReadLock thatlock(aThat COMMA_LOCKVAL_SRC_POS);
    m->bd.attachCopy(aThat->m->bd);

    /* Confirm a successful initialization */
    autoInitSpan.setSucceeded();

    /* Construct a short log name for this attachment. */
    i_updateLogName();

    LogFlowThisFunc(("LEAVE - %s\n", i_getLogName()));
    return S_OK;
}

/**
 *  Initializes the guest object given another guest object
 *  (a kind of copy constructor). This object makes a private copy of data
 *  of the original object passed as an argument.
 *
 *  @note Locks @a aThat object for reading.
 */
HRESULT USBDeviceFilter::initCopy(USBDeviceFilters *aParent, USBDeviceFilter *aThat)
{
    LogFlowThisFunc(("aParent=%p, aThat=%p\n", aParent, aThat));

    ComAssertRet(aParent && aThat, E_INVALIDARG);

    /* Enclose the state transition NotReady->InInit->Ready */
    AutoInitSpan autoInitSpan(this);
    AssertReturn(autoInitSpan.isOk(), E_FAIL);

    unconst(mParent) = aParent;
    /* mPeer is left null */

    m_fModified = false;

    /* sanity */
    AutoCaller thatCaller(aThat);
    AssertComRCReturnRC(thatCaller.rc());

    AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
    bd.attachCopy(aThat->bd);

    /* reset the arbitrary ID field
     * (this field is something unique that two distinct objects, even if they
     * are deep copies of each other, should not share) */
    bd->mId = NULL;

    mInList = aThat->mInList;

    /* Confirm successful initialization */
    autoInitSpan.setSucceeded();

    return S_OK;
}

/**
 * Initializes the VirtualBoxClient object.
 *
 * @returns COM result indicator
 */
HRESULT VirtualBoxClient::init()
{
    LogFlowThisFunc(("\n"));

    HRESULT rc;
    /* Enclose the state transition NotReady->InInit->Ready */
    AutoInitSpan autoInitSpan(this);
    AssertReturn(autoInitSpan.isOk(), E_FAIL);

    mData.m_ThreadWatcher = NIL_RTTHREAD;
    mData.m_SemEvWatcher = NIL_RTSEMEVENT;

    if (ASMAtomicIncU32(&g_cInstances) != 1)
        AssertFailedReturn(E_FAIL);

    rc = mData.m_pVirtualBox.createLocalObject(CLSID_VirtualBox);
    AssertComRCReturnRC(rc);

    rc = unconst(mData.m_pEventSource).createObject();
    AssertComRCReturnRC(rc);
    rc = mData.m_pEventSource->init(static_cast<IVirtualBoxClient *>(this));
    AssertComRCReturnRC(rc);

    /* Setting up the VBoxSVC watcher thread. If anything goes wrong here it
     * is not considered important enough to cause any sort of visible
     * failure. The monitoring will not be done, but that's all. */
    int vrc = RTSemEventCreate(&mData.m_SemEvWatcher);
    AssertRC(vrc);
    if (RT_SUCCESS(vrc))
    {
        vrc = RTThreadCreate(&mData.m_ThreadWatcher, SVCWatcherThread,
                             this, 0, RTTHREADTYPE_INFREQUENT_POLLER,
                             RTTHREADFLAGS_WAITABLE, "VBoxSVCWatcher");
        AssertRC(vrc);
    }
    else
    {
        RTSemEventDestroy(mData.m_SemEvWatcher);
        mData.m_SemEvWatcher = NIL_RTSEMEVENT;
    }

    /* Confirm a successful initialization */
    autoInitSpan.setSucceeded();

    return rc;
}

/**
 * Sets the internal result code and attempts to retrieve additional error
 * info from the current thread. Gets called from Progress::notifyComplete(),
 * but can be called again to override a previous result set with
 * notifyComplete().
 *
 * @param aResultCode
 */
HRESULT Progress::setResultCode(HRESULT aResultCode)
{
    AutoCaller autoCaller(this);
    AssertComRCReturnRC(autoCaller.rc());

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    mResultCode = aResultCode;

    HRESULT rc = S_OK;

    if (FAILED(aResultCode))
    {
        /* try to import error info from the current thread */

#if !defined(VBOX_WITH_XPCOM)

        ComPtr<IErrorInfo> err;
        rc = ::GetErrorInfo(0, err.asOutParam());
        if (rc == S_OK && err)
        {
            rc = err.queryInterfaceTo(mErrorInfo.asOutParam());
            if (SUCCEEDED(rc) && !mErrorInfo)
                rc = E_FAIL;
        }

#else /* !defined(VBOX_WITH_XPCOM) */

        nsCOMPtr<nsIExceptionService> es;
        es = do_GetService(NS_EXCEPTIONSERVICE_CONTRACTID, &rc);
        if (NS_SUCCEEDED(rc))
        {
            nsCOMPtr <nsIExceptionManager> em;
            rc = es->GetCurrentExceptionManager(getter_AddRefs(em));
            if (NS_SUCCEEDED(rc))
            {
                ComPtr<nsIException> ex;
                rc = em->GetCurrentException(ex.asOutParam());
                if (NS_SUCCEEDED(rc) && ex)
                {
                    rc = ex.queryInterfaceTo(mErrorInfo.asOutParam());
                    if (NS_SUCCEEDED(rc) && !mErrorInfo)
                        rc = E_FAIL;
                }
            }
        }
#endif /* !defined(VBOX_WITH_XPCOM) */

        AssertMsg(rc == S_OK, ("Couldn't get error info (rc=%08X) while trying to set a failed result (%08X)!\n",
                               rc, aResultCode));
    }

    return rc;
}

/**
 *  Loads settings from the given port node.
 *  May be called once right after this object creation.
 *
 *  @param aPortNode <Port> node.
 *
 *  @note Locks this object for writing.
 */
HRESULT ParallelPort::i_loadSettings(const settings::ParallelPort &data)
{
    AutoCaller autoCaller(this);
    AssertComRCReturnRC(autoCaller.rc());

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    // simply copy
    *m->bd.data() = data;

    return S_OK;
}

/**
 *  Saves settings to the given machine node.
 *
 *  @param aMachineNode <Machine> node.
 *
 *  @note Locks this object for reading.
 */
HRESULT AudioAdapter::saveSettings(settings::AudioAdapter &data)
{
    AutoCaller autoCaller(this);
    AssertComRCReturnRC(autoCaller.rc());

    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);

    data.fEnabled = !!mData->mEnabled;
    data.controllerType = mData->mAudioController;
    data.driverType = mData->mAudioDriver;
    return S_OK;
}

/**
 *  Saves the port settings to the given port node.
 *
 *  Note that the given Port node is completely empty on input.
 *
 *  @param aPortNode <Port> node.
 *
 *  @note Locks this object for reading.
 */
HRESULT SerialPort::i_saveSettings(settings::SerialPort &data)
{
    AutoCaller autoCaller(this);
    AssertComRCReturnRC(autoCaller.rc());

    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);

    // simply copy
    data = *m->bd.data();

    return S_OK;
}

/**
 * Marks the operation as complete and attaches full error info.
 *
 * See VirtualBoxBase::setError(HRESULT, const GUID &, const wchar_t
 * *, const char *, ...) for more info.
 *
 * @param aResultCode   Operation result (error) code, must not be S_OK.
 * @param aIID          IID of the interface that defines the error.
 * @param aComponent    Name of the component that generates the error.
 * @param aText         Error message (must not be null), an RTStrPrintf-like
 *                      format string in UTF-8 encoding.
 * @param va            List of arguments for the format string.
 */
HRESULT Progress::i_notifyCompleteV(HRESULT aResultCode,
                                    const GUID &aIID,
                                    const char *pcszComponent,
                                    const char *aText,
                                    va_list va)
{
    Utf8Str text(aText, va);

    AutoCaller autoCaller(this);
    AssertComRCReturnRC(autoCaller.rc());

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    AssertReturn(mCompleted == FALSE, E_FAIL);

    if (mCanceled && SUCCEEDED(aResultCode))
        aResultCode = E_FAIL;

    mCompleted = TRUE;
    mResultCode = aResultCode;

    AssertReturn(FAILED(aResultCode), E_FAIL);

    ComObjPtr<VirtualBoxErrorInfo> errorInfo;
    HRESULT rc = errorInfo.createObject();
    AssertComRC(rc);
    if (SUCCEEDED(rc))
    {
        errorInfo->init(aResultCode, aIID, pcszComponent, text);
        errorInfo.queryInterfaceTo(mErrorInfo.asOutParam());
    }

#if !defined VBOX_COM_INPROC
    /* remove from the global collection of pending progress operations */
    if (mParent)
        mParent->i_removeProgress(mId.ref());
#endif

    /* wake up all waiting threads */
    if (mWaitersCount > 0)
        RTSemEventMultiSignal(mCompletedSem);

    return rc;
}

/**
 * Initializes the keyboard object.
 *
 * @returns COM result indicator
 * @param parent handle of our parent object
 */
HRESULT Keyboard::init(Console *aParent)
{
    LogFlowThisFunc(("aParent=%p\n", aParent));

    ComAssertRet(aParent, E_INVALIDARG);

    /* Enclose the state transition NotReady->InInit->Ready */
    AutoInitSpan autoInitSpan(this);
    AssertReturn(autoInitSpan.isOk(), E_FAIL);

    unconst(mParent) = aParent;

    unconst(mEventSource).createObject();
    HRESULT rc = mEventSource->init();
    AssertComRCReturnRC(rc);

    /* Confirm a successful initialization */
    autoInitSpan.setSucceeded();

    return S_OK;
}