public void Write(long posBy4Kbs, int numberOf4Kbs, byte *source)
{
const int pageSizeTo4KbRatio = (Constants.Storage.PageSize / (4 * Constants.Size.Kilobyte));
var pageNumber = posBy4Kbs / pageSizeTo4KbRatio;
var offsetBy4Kb = posBy4Kbs % pageSizeTo4KbRatio;
var numberOfPages = numberOf4Kbs / pageSizeTo4KbRatio;
if (numberOf4Kbs % pageSizeTo4KbRatio != 0)
{
numberOfPages++;
}
var newPagerState = _abstractPager.EnsureContinuous(pageNumber, numberOfPages);
if (newPagerState != null)
{
_pagerState.Release();
newPagerState.AddRef();
_pagerState = newPagerState;
}
var toWrite = numberOf4Kbs * 4 * Constants.Size.Kilobyte;
byte *destination = _abstractPager.AcquirePagePointer(null, pageNumber, _pagerState)
+ (offsetBy4Kb * 4 * Constants.Size.Kilobyte);
_abstractPager.UnprotectPageRange(destination, (ulong)toWrite);
Memory.Copy(destination, source, toWrite);
_abstractPager.ProtectPageRange(destination, (ulong)toWrite);
}
public void Write(long pageNumber, int numberOfPages, byte *source)
{
var newPagerState = _abstractPager.EnsureContinuous(pageNumber, numberOfPages);
if (newPagerState != null)
{
_pagerState.Release();
newPagerState.AddRef();
_pagerState = newPagerState;
}
var toWrite = numberOfPages * _abstractPager.PageSize;
byte *destination = _abstractPager.AcquirePagePointer(null, pageNumber, _pagerState);
_abstractPager.UnprotectPageRange(destination, (ulong)toWrite);
Memory.BulkCopy(destination, source, toWrite);
_abstractPager.ProtectPageRange(destination, (ulong)toWrite);
}