internal BlobReader GetBlobReader(BlobHandle handle)
{
if (handle.IsVirtual)
{
if (_lazyVirtualHeapBlobs == null)
{
Interlocked.CompareExchange(ref _lazyVirtualHeapBlobs, new VirtualHeapBlobTable(), null);
}
int index = (int)handle.GetVirtualIndex();
int length = s_virtualHeapBlobs[index].Length;
VirtualHeapBlob virtualBlob;
lock (_lazyVirtualHeapBlobs)
{
if (!_lazyVirtualHeapBlobs.Table.TryGetValue(handle, out virtualBlob))
{
virtualBlob = new VirtualHeapBlob(GetVirtualBlobArray(handle, unique: false));
_lazyVirtualHeapBlobs.Table.Add(handle, virtualBlob);
}
}
return(new BlobReader(new MemoryBlock((byte *)virtualBlob.Pinned.AddrOfPinnedObject(), length)));
}
int offset, size;
Block.PeekHeapValueOffsetAndSize(handle.Index, out offset, out size);
return(new BlobReader(this.Block.GetMemoryBlockAt(offset, size)));
}
internal MemoryBlock GetMemoryBlock(BlobHandle handle)
{
if (handle.IsVirtual)
{
return(GetVirtualHandleMemoryBlock(handle));
}
int offset, size;
Block.PeekHeapValueOffsetAndSize(handle.GetHeapOffset(), out offset, out size);
return(Block.GetMemoryBlockAt(offset, size));
}
internal string GetString(UserStringHandle handle)
{
int offset, size;
if (!Block.PeekHeapValueOffsetAndSize(handle.GetHeapOffset(), out offset, out size))
{
return string.Empty;
}
// Spec: Furthermore, there is an additional terminal byte (so all byte counts are odd, not even).
// The size in the blob header is the length of the string in bytes + 1.
return Block.PeekUtf16(offset, size & ~1);
}