internal void WriteDirect(TransactionHeader* transactionHeader, PageFromScratchBuffer pages)
{
for (int i = 0; i < pages.NumberOfPages; i++)
{
var page = _env.ScratchBufferPool.ReadPage(pages.ScratchFileNumber, pages.PositionInScratchBuffer+i);
int numberOfPages = 1;
if (page.IsOverflow)
{
numberOfPages = (page.OverflowSize / AbstractPager.PageSize) + (page.OverflowSize % AbstractPager.PageSize == 0 ? 0 : 1);
i += numberOfPages;
_overflowPagesInTransaction += (numberOfPages - 1);
}
WritePageDirect(page, numberOfPages);
_state.NextPageNumber = transactionHeader->NextPageNumber;
}
}
private void InitTransactionHeader()
{
var allocation = _env.ScratchBufferPool.Allocate(this, 1);
var page = _env.ScratchBufferPool.ReadPage(allocation.ScratchFileNumber, allocation.PositionInScratchBuffer);
_transactionHeaderPage = allocation;
UnmanagedMemory.Set(page.Base, 0, AbstractPager.PageSize);
_txHeader = (TransactionHeader*)page.Base;
_txHeader->HeaderMarker = Constants.TransactionHeaderMarker;
_txHeader->TransactionId = _id;
_txHeader->NextPageNumber = _state.NextPageNumber;
_txHeader->LastPageNumber = -1;
_txHeader->PageCount = -1;
_txHeader->Crc = 0;
_txHeader->TxMarker = TransactionMarker.None;
_txHeader->Compressed = false;
_txHeader->CompressedSize = 0;
_txHeader->UncompressedSize = 0;
_allocatedPagesInTransaction = 0;
_overflowPagesInTransaction = 0;
_scratchPagesTable.Clear();
}
internal void WriteDirect(TransactionHeader* transactionHeader, PageFromScratchBuffer pages)
{
for (int i = 0; i < pages.NumberOfPages; i++)
{
var page = _env.ScratchBufferPool.ReadPage(pages.ScratchFileNumber, pages.PositionInScratchBuffer+i);
int numberOfPages = 1;
if (page.IsOverflow)
{
numberOfPages = (page.OverflowSize / AbstractPager.PageSize) + (page.OverflowSize % AbstractPager.PageSize == 0 ? 0 : 1);
i += numberOfPages;
_overflowPagesInTransaction += (numberOfPages - 1);
}
var pageFromScratchBuffer = _env.ScratchBufferPool.Allocate(this, numberOfPages);
var dest = _env.ScratchBufferPool.AcquirePagePointer(pageFromScratchBuffer.ScratchFileNumber, pageFromScratchBuffer.PositionInScratchBuffer);
StdLib.memcpy(dest, page.Base, numberOfPages*AbstractPager.PageSize);
_allocatedPagesInTransaction++;
_dirtyPages.Add(page.PageNumber);
page.Dirty = true;
if (numberOfPages > 1)
_dirtyOverflowPages.Add(page.PageNumber + 1, numberOfPages - 1);
_scratchPagesTable[page.PageNumber] = pageFromScratchBuffer;
_transactionPages.Add(pageFromScratchBuffer);
_state.NextPageNumber = transactionHeader->NextPageNumber;
}
}
