public ReservedRegion(ulong maxSize, ulong granularity = 0)
{
if (granularity == 0)
{
granularity = DefaultGranularity;
}
Pointer = MemoryManagement.Reserve(maxSize);
_maxSize = maxSize;
_sizeGranularity = granularity;
_currentSize = 0;
}
public void ExpandIfNeeded(ulong desiredSize)
{
if (desiredSize > _maxSize)
{
throw new OutOfMemoryException();
}
if (desiredSize > _currentSize)
{
// Lock, and then check again. We only want to commit once.
lock (this)
{
if (desiredSize >= _currentSize)
{
ulong overflowBytes = desiredSize - _currentSize;
ulong moreToCommit = (((_sizeGranularity - 1) + overflowBytes) / _sizeGranularity) * _sizeGranularity; // Round up.
MemoryManagement.Commit(new IntPtr((long)Pointer + (long)_currentSize), moreToCommit);
_currentSize += moreToCommit;
}
}
}
}
