public void CopyToOriginal(LowLevelTransaction tx, bool defragRequired, bool wasModified)
{
if (CalcSizeUsed() < Original.PageMaxSpace)
{
// no need to compress
Original.Lower = (ushort)Constants.Tree.PageHeaderSize;
Original.Upper = (ushort)Original.PageSize;
Original.Flags &= ~PageFlags.Compressed;
for (var i = 0; i < NumberOfEntries; i++)
{
var node = GetNode(i);
using (TreeNodeHeader.ToSlicePtr(tx.Allocator, node, out var slice))
Original.CopyNodeDataToEndOfPage(node, slice);
}
}
else
{
using (LeafPageCompressor.TryGetCompressedTempPage(tx, this, out var compressed, defrag: defragRequired))
{
if (compressed == null)
{
if (wasModified == false)
{
return;
}
ThrowCouldNotCompressDecompressedPage(PageNumber);
}
LeafPageCompressor.CopyToPage(compressed, Original);
}
}
}
public void CopyToOriginal(LowLevelTransaction tx, bool defragRequired)
{
if (CalcSizeUsed() < Original.PageMaxSpace)
{
// no need to compress
Original.Lower = (ushort)Constants.Tree.PageHeaderSize;
Original.Upper = (ushort)Original.PageSize;
Original.Flags &= ~PageFlags.Compressed;
for (var i = 0; i < NumberOfEntries; i++)
{
var node = GetNode(i);
Slice slice;
using (TreeNodeHeader.ToSlicePtr(tx.Allocator, node, out slice))
Original.CopyNodeDataToEndOfPage(node, slice);
}
}
else
{
CompressionResult compressed;
using (LeafPageCompressor.TryGetCompressedTempPage(tx, this, out compressed, defrag: defragRequired))
{
if (compressed == null)
{
throw new InvalidOperationException("Could not compress a page which was already compressed. Should never happen");
}
LeafPageCompressor.CopyToPage(compressed, Original);
}
}
}
public void CopyToOriginal(LowLevelTransaction tx, bool defragRequired, bool wasModified, Tree tree)
{
if (CalcSizeUsed() < Original.PageMaxSpace)
{
// no need to compress
Original.Lower = (ushort)Constants.Tree.PageHeaderSize;
Original.Upper = (ushort)Original.PageSize;
Original.Flags &= ~PageFlags.Compressed;
for (var i = 0; i < NumberOfEntries; i++)
{
var node = GetNode(i);
using (TreeNodeHeader.ToSlicePtr(tx.Allocator, node, out var slice))
Original.CopyNodeDataToEndOfPage(node, slice);
}
tree.DecompressionsCache.Invalidate(PageNumber, DecompressionUsage.Write);
}
else
{
using (LeafPageCompressor.TryGetCompressedTempPage(tx, this, out var compressed, defrag: defragRequired))
{
if (compressed == null)
{
if (wasModified == false)
{
return;
}
if (NumberOfEntries > 0)
{
// we aren't able to compress the page back to 8KB page
// let's split it and try to copy it then
SplitPage(tx, tree);
}
else
{
ThrowCouldNotCompressEmptyDecompressedPage(PageNumber);
}
CopyToOriginal(tx, defragRequired: true, wasModified: true, tree);
return;
}
LeafPageCompressor.CopyToPage(compressed, Original);
}
}
}