/**
* 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;
}
/**
* 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 AudioAdapter::initCopy (Machine *aParent, AudioAdapter *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 */
AutoCaller thatCaller (aThat);
AssertComRCReturnRC(thatCaller.rc());
AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
mData = new Data();
mData->m.attachCopy (aThat->mData->m);
/* Confirm a successful initialization */
autoInitSpan.setSucceeded();
return S_OK;
}
/**
* Cancels sharing (if any) by making an independent copy of data.
* This operation also resets this object's peer to NULL.
*
* @note Locks this object for writing, together with the peer object
* represented by @a aThat (locked for reading).
*/
void USBDeviceFilter::unshare()
{
/* sanity */
AutoCaller autoCaller(this);
AssertComRCReturnVoid (autoCaller.rc());
/* sanity too */
AutoCaller peerCaller (mPeer);
AssertComRCReturnVoid (peerCaller.rc());
/* peer is not modified, lock it for reading (mPeer is "master" so locked
* first) */
AutoReadLock rl(mPeer COMMA_LOCKVAL_SRC_POS);
AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
if (mData.isShared())
{
if (!mData.isBackedUp())
mData.backup();
mData.commit();
}
unconst(mPeer) = NULL;
}
/**
* 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);
mData.attachCopy (aThat->mData);
/* 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) */
mData->mId = NULL;
mInList = aThat->mInList;
/* Confirm successful initialization */
autoInitSpan.setSucceeded();
return S_OK;
}
/**
* @note Locks this object for writing, together with the peer object
* represented by @a aThat (locked for reading).
*/
void USBController::copyFrom (USBController *aThat)
{
AssertReturnVoid (aThat != NULL);
/* sanity */
AutoCaller autoCaller(this);
AssertComRCReturnVoid (autoCaller.rc());
/* sanity too */
AutoCaller thatCaller (aThat);
AssertComRCReturnVoid (thatCaller.rc());
/* even more sanity */
AutoAnyStateDependency adep(m->pParent);
AssertComRCReturnVoid (adep.rc());
/* Machine::copyFrom() may not be called when the VM is running */
AssertReturnVoid (!Global::IsOnline (adep.machineState()));
/* peer is not modified, lock it for reading (aThat is "master" so locked
* first) */
AutoReadLock rl(aThat COMMA_LOCKVAL_SRC_POS);
AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
/* this will back up current data */
m->bd.assignCopy(aThat->m->bd);
#ifdef VBOX_WITH_USB
/* Note that we won't inform the USB proxy about new filters since the VM is
* not running when we are here and therefore no need to do so */
/* create private copies of all filters */
m->llDeviceFilters.backup();
m->llDeviceFilters->clear();
for (DeviceFilterList::const_iterator it = aThat->m->llDeviceFilters->begin();
it != aThat->m->llDeviceFilters->end();
++ it)
{
ComObjPtr<USBDeviceFilter> filter;
filter.createObject();
filter->initCopy (this, *it);
m->llDeviceFilters->push_back (filter);
}
#endif /* VBOX_WITH_USB */
}
/**
* Initializes the object given another object
* (a kind of copy constructor). This object shares data with
* the object passed as an argument.
*
* @param aReshare
* When false, the original object will remain a data owner.
* Otherwise, data ownership will be transferred from the original
* object to this one.
*
* @note This object must be destroyed before the original object
* it shares data with is destroyed.
*
* @note Locks @a aThat object for writing if @a aReshare is @c true, or for
* reading if @a aReshare is false.
*/
HRESULT USBDeviceFilter::init (USBDeviceFilters *aParent, USBDeviceFilter *aThat,
bool aReshare /* = false */)
{
LogFlowThisFunc(("aParent=%p, aThat=%p, aReshare=%RTbool\n",
aParent, aThat, aReshare));
ComAssertRet(aParent && aThat, E_INVALIDARG);
/* Enclose the state transition NotReady->InInit->Ready */
AutoInitSpan autoInitSpan(this);
AssertReturn(autoInitSpan.isOk(), E_FAIL);
unconst(mParent) = aParent;
m_fModified = false;
/* sanity */
AutoCaller thatCaller (aThat);
AssertComRCReturnRC(thatCaller.rc());
if (aReshare)
{
AutoWriteLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
unconst(aThat->mPeer) = this;
mData.attach (aThat->mData);
}
else
{
unconst(mPeer) = aThat;
AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
mData.share (aThat->mData);
}
/* the arbitrary ID field is not reset because
* the copy is a shadow of the original */
mInList = aThat->mInList;
/* Confirm successful initialization */
autoInitSpan.setSucceeded();
return S_OK;
}
HRESULT MachineToken::abandon(AutoCaller &aAutoCaller)
{
/* have to release the AutoCaller before calling uninit(), self-deadlock */
aAutoCaller.release();
/* uninit does everything we need */
uninit(true);
return S_OK;
}
/**
* @note Locks this object for writing, together with the peer object
* represented by @a aThat (locked for reading).
*/
void AudioAdapter::i_copyFrom(AudioAdapter *aThat)
{
AssertReturnVoid (aThat != NULL);
/* sanity */
AutoCaller autoCaller(this);
AssertComRCReturnVoid (autoCaller.rc());
/* sanity too */
AutoCaller thatCaller (aThat);
AssertComRCReturnVoid (thatCaller.rc());
/* peer is not modified, lock it for reading (aThat is "master" so locked
* first) */
AutoReadLock rl(aThat COMMA_LOCKVAL_SRC_POS);
AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
/* this will back up current data */
mData->m.assignCopy(aThat->mData->m);
}
/**
* @note Locks this object for writing, together with the peer object (also
* for writing) if there is one.
*/
void AudioAdapter::i_commit()
{
/* sanity */
AutoCaller autoCaller(this);
AssertComRCReturnVoid (autoCaller.rc());
/* sanity too */
AutoCaller peerCaller (mPeer);
AssertComRCReturnVoid (peerCaller.rc());
/* lock both for writing since we modify both (mPeer is "master" so locked
* first) */
AutoMultiWriteLock2 alock(mPeer, this COMMA_LOCKVAL_SRC_POS);
if (mData->m.isBackedUp())
{
mData->m.commit();
if (mPeer)
{
/* attach new data to the peer and reshare it */
mPeer->mData->m.attach (mData->m);
}
}
}
/**
* @note Locks this object for writing, together with the peer object (also
* for writing) if there is one.
*/
void StorageController::commit()
{
/* sanity */
AutoCaller autoCaller(this);
AssertComRCReturnVoid (autoCaller.rc());
/* sanity too */
AutoCaller peerCaller (m->pPeer);
AssertComRCReturnVoid (peerCaller.rc());
/* lock both for writing since we modify both (m->pPeer is "master" so locked
* first) */
AutoMultiWriteLock2 alock(m->pPeer, this COMMA_LOCKVAL_SRC_POS);
if (m->bd.isBackedUp())
{
m->bd.commit();
if (m->pPeer)
{
// attach new data to the peer and reshare it
m->pPeer->m->bd.attach (m->bd);
}
}
}
