public void WriteGather(long position, IntPtr[] pages)
{
if (Disposed)
{
throw new ObjectDisposedException("Win32JournalWriter");
}
EnsureSegmentsSize(pages);
_nativeOverlapped->OffsetLow = (int)(position & 0xffffffff);
_nativeOverlapped->OffsetHigh = (int)(position >> 32);
_nativeOverlapped->EventHandle = IntPtr.Zero; // _manualResetEvent.SafeWaitHandle.DangerousGetHandle();
for (int i = 0; i < pages.Length; i++)
{
if (IntPtr.Size == 4)
{
_segments[i].Alignment = (ulong)pages[i];
}
else
{
_segments[i].Buffer = pages[i];
}
}
_segments[pages.Length].Alignment = 0; // null terminating
var operationCompleted = Win32NativeFileMethods.WriteFileGather(_handle, _segments, (uint)pages.Length * 4096, IntPtr.Zero, _nativeOverlapped);
uint lpNumberOfBytesWritten;
if (operationCompleted)
{
if (Win32NativeFileMethods.GetOverlappedResult(_handle, _nativeOverlapped, out lpNumberOfBytesWritten, true) == false)
{
throw new VoronUnrecoverableErrorException("Could not write to journal " + _filename, new Win32Exception(Marshal.GetLastWin32Error()));
}
return;
}
switch (Marshal.GetLastWin32Error())
{
case Win32NativeFileMethods.ErrorSuccess:
case Win32NativeFileMethods.ErrorIOPending:
if (Win32NativeFileMethods.GetOverlappedResult(_handle, _nativeOverlapped, out lpNumberOfBytesWritten, true) == false)
{
throw new VoronUnrecoverableErrorException("Could not write to journal " + _filename, new Win32Exception(Marshal.GetLastWin32Error()));
}
break;
default:
throw new VoronUnrecoverableErrorException("Could not write to journal " + _filename, new Win32Exception(Marshal.GetLastWin32Error()));
}
}
public void WriteGather(long position, IntPtr[] pages)
{
if (Disposed)
{
throw new ObjectDisposedException("Win32JournalWriter");
}
var physicalPages = EnsureSegmentsSize(pages);
_nativeOverlapped->OffsetLow = (int)(position & 0xffffffff);
_nativeOverlapped->OffsetHigh = (int)(position >> 32);
_nativeOverlapped->EventHandle = IntPtr.Zero;
PreparePagesToWrite(pages);
var sp = Stopwatch.StartNew();
// WriteFileGather will only be able to write x pages of size GetSystemInfo().dwPageSize. Usually that is 4096 (4kb). If you are
// having trouble with this method, ensure that this value havent changed for your environment.
var operationCompleted = Win32NativeFileMethods.WriteFileGather(_handle, _segments, (uint)(physicalPages * PhysicalPageSize), IntPtr.Zero, _nativeOverlapped);
uint lpNumberOfBytesWritten;
var sizeToWrite = physicalPages * PhysicalPageSize;
if (operationCompleted)
{
if (Win32NativeFileMethods.GetOverlappedResult(_handle, _nativeOverlapped, out lpNumberOfBytesWritten, true) == false)
{
throw new VoronUnrecoverableErrorException("Could not write to journal " + _filename, new Win32Exception(Marshal.GetLastWin32Error()));
}
// TODO : Measure IO times (RavenDB-4659) - Wrote {sizeToWrite/1024:#,#} kb in {sp.ElapsedMilliseconds:#,#} ms
return;
}
switch (Marshal.GetLastWin32Error())
{
case Win32NativeFileMethods.ErrorSuccess:
case Win32NativeFileMethods.ErrorIOPending:
if (Win32NativeFileMethods.GetOverlappedResult(_handle, _nativeOverlapped, out lpNumberOfBytesWritten, true) == false)
{
throw new VoronUnrecoverableErrorException("Could not write to journal " + _filename, new Win32Exception(Marshal.GetLastWin32Error()));
}
// TODO : Measure IO times (RavenDB-4659) - Wrote {sizeToWrite/1024:#,#} kb in {sp.ElapsedMilliseconds:#,#} ms
break;
default:
throw new VoronUnrecoverableErrorException("Could not write to journal " + _filename, new Win32Exception(Marshal.GetLastWin32Error()));
}
}
