/// <summary>
/// Finish transaction, release lock and call done action
/// </summary>
private void Done()
{
ENSURE(_disposed == false, "transaction must be active before call Done");
_disposed = true;
_locker.ExitTransaction();
_reader.Dispose();
// call done callback
_done(_transactionID);
}
/// <summary>
/// Dispose
/// </summary>
public void Dispose()
{
ENSURE(_state != TransactionState.Disposed, "transaction must be active before call Done");
// clean snapshots if there is no commit/rollback
if (_state == TransactionState.Active && _snapshots.Count > 0)
{
// release writable snapshots
foreach (var snapshot in _snapshots.Values.Where(x => x.Mode == LockMode.Write))
{
// discard all dirty pages
_disk.DiscardDirtyPages(snapshot.GetWritablePages(true, true).Select(x => x.Buffer));
// discard all clean pages
_disk.DiscardCleanPages(snapshot.GetWritablePages(false, true).Select(x => x.Buffer));
}
// release buffers in read-only snaphosts
foreach (var snapshot in _snapshots.Values.Where(x => x.Mode == LockMode.Read))
{
foreach (var page in snapshot.LocalPages)
{
page.Buffer.Release();
}
snapshot.CollectionPage?.Buffer.Release();
}
}
_reader.Dispose();
_state = TransactionState.Disposed;
}
// Protected implementation of Dispose pattern.
protected virtual void Dispose(bool dispose)
{
if (_state == TransactionState.Disposed)
{
return;
}
ENSURE(_state != TransactionState.Disposed, "transaction must be active before call Done");
// clean snapshots if there is no commit/rollback
if (_state == TransactionState.Active && _snapshots.Count > 0)
{
// release writable snapshots
foreach (var snapshot in _snapshots.Values.Where(x => x.Mode == LockMode.Write))
{
// discard all dirty pages
_disk.Cache.DiscardDirtyPages(snapshot.GetWritablePages(true, true).Select(x => x.Buffer));
// discard all clean pages
_disk.Cache.DiscardCleanPages(snapshot.GetWritablePages(false, true).Select(x => x.Buffer));
}
// release buffers in read-only snaphosts
foreach (var snapshot in _snapshots.Values.Where(x => x.Mode == LockMode.Read))
{
foreach (var page in snapshot.LocalPages)
{
page.Buffer.Release();
}
snapshot.CollectionPage?.Buffer.Release();
}
}
_reader.Dispose();
_state = TransactionState.Disposed;
if (!dispose)
{
// Remove transaction monitor's dictionary
_monitor.ReleaseTransaction(this);
}
}