public KernelResult ReserveHandle(out int handle)
{
handle = 0;
lock (_table)
{
if (_activeSlotsCount >= _size)
{
return(KernelResult.HandleTableFull);
}
KHandleEntry entry = _nextFreeEntry;
_nextFreeEntry = entry.Next;
_activeSlotsCount++;
handle = (_idCounter << 15) | entry.Index;
if ((short)(_idCounter + 1) >= 0)
{
_idCounter++;
}
else
{
_idCounter = 1;
}
}
return(KernelResult.Success);
}
public KernelResult GenerateHandle(object obj, out int handle)
{
handle = 0;
lock (_table)
{
if (_activeSlotsCount >= _size)
{
return(KernelResult.HandleTableFull);
}
KHandleEntry entry = _nextFreeEntry;
_nextFreeEntry = entry.Next;
entry.Obj = obj;
entry.HandleId = _idCounter;
_activeSlotsCount++;
handle = (int)((_idCounter << 15) & 0xffff8000) | entry.Index;
if ((short)(_idCounter + 1) >= 0)
{
_idCounter++;
}
else
{
_idCounter = 1;
}
}
return(KernelResult.Success);
}
public void SetReservedHandleObj(int handle, KAutoObject obj)
{
int index = (handle >> 0) & 0x7fff;
int handleId = (handle >> 15);
lock (_table)
{
KHandleEntry entry = _table[index];
entry.Obj = obj;
entry.HandleId = (ushort)(handle >> 15);
obj.IncrementReferenceCount();
}
}
public void CancelHandleReservation(int handle)
{
int index = (handle >> 0) & 0x7fff;
lock (_table)
{
KHandleEntry entry = _table[index];
entry.Obj = null;
entry.Next = _nextFreeEntry;
_nextFreeEntry = entry;
_activeSlotsCount--;
}
}
public bool CloseHandle(int handle)
{
if ((handle >> 30) != 0 ||
handle == SelfThreadHandle ||
handle == SelfProcessHandle)
{
return(false);
}
int index = (handle >> 0) & 0x7fff;
int handleId = (handle >> 15);
KAutoObject obj = null;
bool result = false;
lock (_table)
{
if (handleId != 0 && index < _size)
{
KHandleEntry entry = _table[index];
if ((obj = entry.Obj) != null && entry.HandleId == handleId)
{
entry.Obj = null;
entry.Next = _nextFreeEntry;
_nextFreeEntry = entry;
_activeSlotsCount--;
result = true;
}
}
}
if (result)
{
obj.DecrementReferenceCount();
}
return(result);
}
public T GetObject <T>(int handle) where T : KAutoObject
{
int index = (handle >> 0) & 0x7fff;
int handleId = (handle >> 15);
lock (_table)
{
if ((handle >> 30) == 0 && handleId != 0 && index < _size)
{
KHandleEntry entry = _table[index];
if (entry.HandleId == handleId && entry.Obj is T obj)
{
return(obj);
}
}
}
return(default);
public void Destroy()
{
lock (_table)
{
for (int index = 0; index < _size; index++)
{
KHandleEntry entry = _table[index];
if (entry.Obj != null)
{
if (entry.Obj is IDisposable disposableObj)
{
disposableObj.Dispose();
}
entry.Obj = null;
entry.Next = _nextFreeEntry;
_nextFreeEntry = entry;
}
}
}
}
public KernelResult Initialize(int size)
{
if ((uint)size > 1024)
{
return(KernelResult.OutOfMemory);
}
if (size < 1)
{
size = 1024;
}
_size = size;
_idCounter = 1;
_table = new KHandleEntry[size];
_tableHead = new KHandleEntry(0);
KHandleEntry entry = _tableHead;
for (int index = 0; index < size; index++)
{
_table[index] = entry;
entry.Next = new KHandleEntry(index + 1);
entry = entry.Next;
}
_table[size - 1].Next = null;
_nextFreeEntry = _tableHead;
return(KernelResult.Success);
}
