public bool IsRegionModified(long position, long size, NvGpuBufferType bufferType)
{
long va = position;
long pa = _memory.GetPhysicalAddress(va);
long endAddr = (va + size + PageMask) & ~PageMask;
long addrTruncated = va & ~PageMask;
bool modified = _memory.IsRegionModified(addrTruncated, endAddr - addrTruncated);
int newBuffMask = 1 << (int)bufferType;
long cachedPagesCount = 0;
while (va < endAddr)
{
long page = _memory.GetPhysicalAddress(va) >> PageBits;
ConcurrentDictionary <long, int> dictionary = _cachedPages[page];
if (dictionary == null)
{
dictionary = new ConcurrentDictionary <long, int>();
_cachedPages[page] = dictionary;
}
else if (modified)
{
_cachedPages[page].Clear();
}
if (dictionary.TryGetValue(pa, out int currBuffMask))
{
if ((currBuffMask & newBuffMask) != 0)
{
cachedPagesCount++;
}
else
{
dictionary[pa] |= newBuffMask;
}
}
else
{
dictionary[pa] = newBuffMask;
}
va += PageSize;
}
return(cachedPagesCount != (endAddr - addrTruncated) >> PageBits);
}