internal bool IsSubtype(UIntPtr candidateHandle)
{
if (candidateHandle == UIntPtr.Zero)
{
DebugLine("RST.IsSubType {0:x8} of {1:x8} => false",
__arglist(candidateHandle, handle));
return(false);
}
RuntimeSystemType candidate = HandleTable.GetHandle(candidateHandle) as RuntimeSystemType;
if (candidate == null)
{
DebugLine("RST.IsSubType {0:x8} of {1:x8} => false",
__arglist(candidateHandle, handle));
return(false);
}
RuntimeSystemType current = this;
while (current != null)
{
if (current == candidate)
{
DebugLine("RST.IsSubType {0:x8} of {1:x8} => true",
__arglist(candidateHandle, handle));
return(true);
}
current = current.parent;
}
DebugLine("RST.IsSubType {0:x8} of {1:x8} => false",
__arglist(candidateHandle, handle));
return(false);
}
private static UIntPtr For(RuntimeSystemType parent, MD5TypeEntry hash)
{
RuntimeSystemType rts = new RuntimeSystemType(parent, hash);
// IMPORTANT we need to allocate these handles to the kernel, since
// they are stored in shared heap object headers that move from process
// to process.
rts.handle = Process.kernelProcess.AllocateHandle(rts);
// TODO: Figure out how to collect them
//
return(rts.handle);
}
internal UIntPtr LookupChildHandle(string name, long lowerHash, long upperHash)
{
MD5TypeEntry childhash = new MD5TypeEntry(name, lowerHash, upperHash);
object childBox = this.ChildHandles[childhash];
if (childBox == null)
{
lock (this.ChildHandles) {
childBox = this.ChildHandles[childhash];
if (childBox == null)
{
UIntPtr child = RuntimeSystemType.For(this, childhash);
this.ChildHandles.Add(childhash, child);
DebugLine("RST.LookupChild({0}.{1:x16}{2:x16}) => Create {3:x8}",
__arglist(name, lowerHash, upperHash, child));
return(child);
}
}
}
DebugLine("RST.LookupChild({0}.{1:x16}{2:x16}) => Find {3:x8}",
__arglist(name, lowerHash, upperHash, (UIntPtr)childBox));
return((UIntPtr)childBox);
}
private RuntimeSystemType(RuntimeSystemType parent, MD5TypeEntry hash)
{
this.hash = hash;
this.parent = parent;
}
static RuntimeSystemType()
{
RootHandle = RuntimeSystemType.For(null, new MD5TypeEntry("System.Object"));
}
