public override void Sync(long totalUnsynced)
{
if (DisposeOnceRunner.Disposed)
{
ThrowAlreadyDisposedException();
}
if ((_fileAttributes & Win32NativeFileAttributes.Temporary) == Win32NativeFileAttributes.Temporary ||
(_fileAttributes & Win32NativeFileAttributes.DeleteOnClose) == Win32NativeFileAttributes.DeleteOnClose)
{
return;
}
using (var metric = Options.IoMetrics.MeterIoRate(FileName.FullPath, IoMetrics.MeterType.DataSync, 0))
{
metric.IncrementSize(totalUnsynced);
metric.SetFileSize(_totalAllocationSize);
if (Win32MemoryMapNativeMethods.FlushFileBuffers(_handle) == false)
{
var lastWin32Error = Marshal.GetLastWin32Error();
throw new Win32Exception($"Unable to flush file buffers on {FileName}",
new Win32Exception(lastWin32Error));
}
}
}
protected override void Dispose(bool disposing)
{
if (stream != null)
{
stream.Dispose();
}
GC.SuppressFinalize(this);
if (isOriginal == false)
{
return;
}
cts.Cancel();
if (basePtr != null)
{
Win32MemoryMapNativeMethods.UnmapViewOfFile(basePtr);
}
if (mmf != IntPtr.Zero)
{
Win32NativeMethods.CloseHandle(mmf);
}
if (fileHandle != null)
{
fileHandle.Close();
}
}
public override void Sync()
{
if (Win32MemoryMapNativeMethods.FlushFileBuffers(_handle) == false)
{
throw new Win32Exception();
}
}
public CodecIndexInput(FileInfo file, Func <Stream, Stream> applyCodecs)
{
try
{
this.file = file;
this.applyCodecs = applyCodecs;
if (file.Length == 0)
{
stream = applyCodecs(Stream.Null);
return;
}
fileHandle = Win32NativeFileMethods.CreateFile(file.FullName,
Win32NativeFileAccess.GenericRead,
Win32NativeFileShare.Read | Win32NativeFileShare.Write | Win32NativeFileShare.Delete,
IntPtr.Zero,
Win32NativeFileCreationDisposition.OpenExisting,
Win32NativeFileAttributes.RandomAccess,
IntPtr.Zero);
if (fileHandle.IsInvalid)
{
const int ERROR_FILE_NOT_FOUND = 2;
if (Marshal.GetLastWin32Error() == ERROR_FILE_NOT_FOUND)
{
throw new FileNotFoundException(file.FullName);
}
throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not open file " + file.FullName);
}
mmf = Win32MemoryMapNativeMethods.CreateFileMapping(fileHandle.DangerousGetHandle(), IntPtr.Zero, Win32MemoryMapNativeMethods.FileMapProtection.PageReadonly,
0, 0, null);
if (mmf == IntPtr.Zero)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not create file mapping for " + file.FullName);
}
basePtr = Win32MemoryMapNativeMethods.MapViewOfFileEx(mmf,
Win32MemoryMapNativeMethods.NativeFileMapAccessType.Read,
0, 0, UIntPtr.Zero, null);
if (basePtr == null)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not map file " + file.FullName);
}
stream = applyCodecs(new MmapStream(file.FullName, basePtr, file.Length));
}
catch (Exception)
{
Dispose(false);
throw;
}
}
