C++ OTE::getSize方法代码示例

template <MWORD ImageNullTerms> HRESULT ObjectMemory::LoadPointers(ibinstream& imageFile, const ImageHeader* pHeader, size_t& cbRead)
{
	ASSERT(pHeader->nGlobalPointers == NumPointers);

	::ZeroMemory(m_pConstObjs, CONSTSPACESIZE);

	size_t cbPerm = 0;
	BYTE* pNextConst = reinterpret_cast<BYTE*>(m_pConstObjs);
	int i;
	for (i = 0; i < NumPermanent; i++)
	{
		VariantObject* pConstObj = reinterpret_cast<VariantObject*>(pNextConst);

		OTE* ote = m_pOT + i;
		MWORD bytesToRead;
		MWORD allocSize;
		if (ote->isNullTerminated())
		{
			MWORD byteSize = ote->getSize();
			allocSize = byteSize + NULLTERMSIZE;
			bytesToRead = byteSize + ImageNullTerms;
		}
		else
		{
			allocSize = bytesToRead = ote->getSize();
		}

		if (bytesToRead > 0)
		{
			// Now load the rest of the object (size includes itself)
			if (!imageFile.read(&(pConstObj->m_fields), bytesToRead))
				return ImageReadError(imageFile);
		}
		else
		{
			if (allocSize == 0) pConstObj = NULL;
		}

		cbPerm += bytesToRead;
		pNextConst += _ROUND2(allocSize, 4);

		markObject(ote);
		Oop* oldLocation = reinterpret_cast<Oop*>(ote->m_location);
		ote->m_location = pConstObj;

		ote->beSticky();
		// Repair the object
		FixupObject(ote, oldLocation, pHeader);
	}

#ifdef _DEBUG
	TRACESTREAM << i<< L" permanent objects loaded totalling " << cbPerm<< L" bytes" << std::endl;
#endif

	memcpy(const_cast<VMPointers*>(&Pointers), &_Pointers, sizeof(Pointers));

	cbRead += cbPerm;
	return S_OK;
}

BytesOTE* __fastcall ObjectMemory::shallowCopy(BytesOTE* ote)
{
	ASSERT(ote->isBytes());

	// Copying byte objects is simple and fast
	VariantByteObject& bytes = *ote->m_location;
	BehaviorOTE* classPointer = ote->m_oteClass;
	MWORD objectSize = ote->sizeOf();

	OTE* copyPointer;
	// Allocate an uninitialized object ...
	VariantByteObject* pLocation = static_cast<VariantByteObject*>(allocObject(objectSize, copyPointer));
	ASSERT((objectSize > MaxSizeOfPoolObject && copyPointer->heapSpace() == OTEFlags::NormalSpace)
		|| copyPointer->heapSpace() == OTEFlags::PoolSpace);

	ASSERT(copyPointer->getSize() == objectSize);
	// This set does not want to copy over the immutability bit - i.e. even if the original was immutable, the 
	// copy will never be.
	copyPointer->setSize(ote->getSize());
	copyPointer->m_dwFlags = (copyPointer->m_dwFlags & ~OTEFlags::WeakMask) | (ote->m_dwFlags & OTEFlags::WeakMask);
	ASSERT(copyPointer->isBytes());
	copyPointer->m_oteClass = classPointer;
	classPointer->countUp();

	// Copy the entire object over the other one, including any null terminator and object header
	memcpy(pLocation, &bytes, objectSize);

	return reinterpret_cast<BytesOTE*>(copyPointer);
}

PointersOTE* __fastcall ObjectMemory::newUninitializedPointerObject(BehaviorOTE* classPointer, MWORD oops)
{
	// Total size must fit in a DWORD bits
	ASSERT(oops < ((DWORD(1) << 30) - ObjectHeaderSize));

	// Don't worry, compiler will not really use multiply instruction here
	MWORD objectSize = SizeOfPointers(oops);
	OTE* ote;
	allocObject(objectSize, ote);
	ASSERT((objectSize > MaxSizeOfPoolObject && ote->heapSpace() == OTEFlags::NormalSpace)
			|| ote->heapSpace() == OTEFlags::PoolSpace);

	// These are stored in the object itself
	ASSERT(ote->getSize() == objectSize);
	classPointer->countUp();
	ote->m_oteClass = classPointer;

	// DO NOT Initialise the fields to nils

	ASSERT(ote->isPointers());
	
	return reinterpret_cast<PointersOTE*>(ote);
}