public BBDataCache(ByteBuffer buffer, int id)
{
Checker.Assert(buffer != null && id != 0);
_bBData = new BBData <T>(buffer.id, id);
_buffer = buffer;
_version = buffer.version;
_headerPtrCache = buffer.FindHeaderPtrWithID(id);
_dataPtrCache = buffer.GetData <T>(_headerPtrCache);
}
internal BBDataCache(ByteBuffer buffer, BBDataHeader *headerPtr, T *dataPtr)
{
Checker.Assert(buffer != null && buffer.isValid && headerPtr != null && dataPtr != null);
_bBData = new BBData <T>(buffer.id, headerPtr->id);
_buffer = buffer;
_version = buffer.version;
_headerPtrCache = headerPtr;
_dataPtrCache = dataPtr;
}
private void CheckVersion()
{
if (_buffer == null)
{
_buffer = ByteBuffer.Get(_bBData.bbId);
}
else if (_version == _buffer.version)
{
return;
}
Checker.Assert(isValid);
//版本发生变化，重新缓存指针
_headerPtrCache = _buffer.FindHeaderPtrWithID(_bBData.id);
_dataPtrCache = _buffer.GetData <T>(_headerPtrCache);
_version = _buffer.version;
}
