/// <summary>
/// Similar with FormatterServices.GetUninitializedObject. Allocate and return zeroed T-typed object.
/// </summary>
public static ClassDisposeHandle UninitializedAllocation(Type t, out Object result)
{
MethodTable *mt = MethodTable.GetMethodTable(t);
int size = mt->BaseSize;
ObjectHeader *objHeader = (ObjectHeader *)RawMemoryManager.Allocate(size);
objHeader->SyncBlock = 0;
objHeader->MethodTable = mt;
RawMemoryManager.FillMemory(objHeader + 1, 0, size - sizeof(ObjectHeader));
result = TypedReferenceHelper.PointerToObject <Object>(objHeader);
return(new ClassDisposeHandle(size, objHeader));
}
public static ClassDisposeHandle Box <T>(T val, out Object boxed) where T : struct
{
MethodTable *mt = MethodTable.GetMethodTable <T>();
int size = mt->BaseSize;
ObjectHeader *objHeader = (ObjectHeader *)RawMemoryManager.Allocate(size);
void *src = TypedReferenceHelper.StructToPointer(ref val);
objHeader->SyncBlock = 0;
objHeader->MethodTable = mt;
RawMemoryManager.MemCpy(objHeader + 1, src, mt->DataSize);
boxed = TypedReferenceHelper.PointerToObject <Object>(objHeader);
return(new ClassDisposeHandle(size, objHeader));
}
public static ClassDisposeHandle AllocateSZArray <T>(int size, out T[] array)
{
MethodTable *pElementMT = MethodTable.GetMethodTable <T>();
MethodTable *pArrayMT = MethodTable.GetMethodTable <T[]>();
int elementSize = pElementMT->IsClass ? sizeof(IntPtr) : pElementMT->DataSize;
int memSize = sizeof(ObjectHeader) + sizeof(SZArrayHeader) + elementSize * size;
int align = sizeof(IntPtr) - 1;
memSize = (memSize + align) & (~align);
void * addr = RawMemoryManager.Allocate(memSize);
ObjectHeader * objHeader = (ObjectHeader *)addr;
SZArrayHeader *szArrayHeader = (SZArrayHeader *)(objHeader + 1);
objHeader->MethodTable = pArrayMT;
szArrayHeader->NumComponents = size;
array = TypedReferenceHelper.PointerToObject <T[]>(objHeader);
return(new ClassDisposeHandle(memSize, objHeader));
}
