public void UpdateFileHeaderAfterDataFileSync(JournalFile file, long maxTransactionId)
{
var txHeaders = stackalloc TransactionHeader[2];
var readTxHeader = &txHeaders[0];
var lastReadTxHeader = txHeaders[1];
var txPos = 0;
while (true)
{
if (file.ReadTransaction(txPos, readTxHeader) == false)
{
break;
}
if (readTxHeader->HeaderMarker != Constants.TransactionHeaderMarker)
{
break;
}
if (readTxHeader->TransactionId > maxTransactionId)
{
break;
}
lastReadTxHeader = *readTxHeader;
var compressedPages = (readTxHeader->CompressedSize / AbstractPager.PageSize) + (readTxHeader->CompressedSize % AbstractPager.PageSize == 0 ? 0 : 1);
txPos += compressedPages + 1;
}
Debug.Assert(_lastSyncedJournal != -1);
Debug.Assert(_lastSyncedTransactionId != -1);
_waj._headerAccessor.Modify(header =>
{
header->TransactionId = lastReadTxHeader.TransactionId;
header->LastPageNumber = lastReadTxHeader.LastPageNumber;
header->Journal.LastSyncedJournal = _lastSyncedJournal;
header->Journal.LastSyncedTransactionId = _lastSyncedTransactionId;
header->Root = lastReadTxHeader.Root;
header->FreeSpace = lastReadTxHeader.FreeSpace;
header->PreviousTransactionCrc = _waj.Shipper.PreviousTransactionCrc;
_waj._updateLogInfo(header);
});
}
public void UpdateFileHeaderAfterDataFileSync(JournalFile file, long oldestActiveTransaction)
{
var txHeaders = stackalloc TransactionHeader[2];
var readTxHeader = &txHeaders[0];
var lastReadTxHeader = txHeaders[1];
var txPos = 0;
while (true)
{
if (file.ReadTransaction(txPos, readTxHeader) == false)
{
break;
}
if (readTxHeader->HeaderMarker != Constants.TransactionHeaderMarker)
{
break;
}
if (readTxHeader->TransactionId + 1 == oldestActiveTransaction)
{
break;
}
lastReadTxHeader = *readTxHeader;
int totalSize = readTxHeader->CompressedSize + sizeof(TransactionHeader);
int compressedPages = (totalSize / _waj._env.Options.PageSize) + (totalSize % _waj._env.Options.PageSize == 0 ? 0 : 1);
// We skip to the next transaction header.
txPos += compressedPages;
}
Debug.Assert(_lastSyncedJournal != -1);
Debug.Assert(_lastSyncedTransactionId != -1);
_waj._headerAccessor.Modify(header =>
{
header->TransactionId = lastReadTxHeader.TransactionId;
header->LastPageNumber = lastReadTxHeader.LastPageNumber;
header->Journal.LastSyncedJournal = _lastSyncedJournal;
header->Journal.LastSyncedTransactionId = _lastSyncedTransactionId;
header->Root = lastReadTxHeader.Root;
_waj._updateLogInfo(header);
});
}