/// <summary>
/// IOCompletion callback for page flush
/// </summary>
/// <param name="errorCode"></param>
/// <param name="numBytes"></param>
/// <param name="overlap"></param>
private void AsyncFlushPageToDeviceCallback(uint errorCode, uint numBytes, NativeOverlapped *overlap)
{
if (errorCode != 0)
{
Trace.TraceError("OverlappedStream GetQueuedCompletionStatus error: {0}", errorCode);
}
PageAsyncFlushResult <Empty> result = (PageAsyncFlushResult <Empty>)Overlapped.Unpack(overlap).AsyncResult;
if (Interlocked.Decrement(ref result.count) == 0)
{
result.Free();
}
Overlapped.Free(overlap);
}
/// <summary>
/// IOCompletion callback for page flush
/// </summary>
/// <param name="errorCode"></param>
/// <param name="numBytes"></param>
/// <param name="overlap"></param>
private void AsyncFlushPageCallback(uint errorCode, uint numBytes, NativeOverlapped *overlap)
{
if (errorCode != 0)
{
Trace.TraceError("OverlappedStream GetQueuedCompletionStatus error: {0}", errorCode);
}
// Set the page status to flushed
PageAsyncFlushResult <Empty> result = (PageAsyncFlushResult <Empty>)Overlapped.Unpack(overlap).AsyncResult;
if (Interlocked.Decrement(ref result.count) == 0)
{
PageStatusIndicator[result.page % BufferSize].LastFlushedUntilAddress = result.untilAddress;
if (!result.partial)
{
while (true)
{
var oldStatus = PageStatusIndicator[result.page % BufferSize].PageFlushCloseStatus;
if (oldStatus.PageCloseStatus == CloseStatus.Closed)
{
ClearPage((int)(result.page % BufferSize), result.page == 0);
}
var newStatus = oldStatus;
newStatus.PageFlushStatus = FlushStatus.Flushed;
if (oldStatus.value == Interlocked.CompareExchange(ref PageStatusIndicator[result.page % BufferSize].PageFlushCloseStatus.value, newStatus.value, oldStatus.value))
{
break;
}
}
}
ShiftFlushedUntilAddress();
result.Free();
}
Overlapped.Free(overlap);
}
