private Result WriteFile(ReadOnlySpan <byte> data)
{
Debug.Assert(FsClient != null);
Debug.Assert(!string.IsNullOrWhiteSpace(FileName));
FsClient.DeleteFile(FileName);
Result rc = FsClient.CreateFile(FileName, data.Length);
if (rc.IsFailure())
{
return(rc);
}
rc = FsClient.OpenFile(out FileHandle handle, FileName, OpenMode.Write);
if (rc.IsFailure())
{
return(rc);
}
rc = FsClient.WriteFile(handle, 0, data, WriteOption.Flush);
FsClient.CloseFile(handle);
return(rc);
}
protected override Result DoWrite(long offset, ReadOnlySpan <byte> source)
{
lock (_locker)
{
if (source.Length == 0)
{
return(Result.Success);
}
Result rc = UpdateSize();
if (rc.IsFailure())
{
return(rc);
}
if (!IsRangeValid(offset, source.Length, FileSize))
{
return(ResultFs.OutOfRange.Log());
}
return(FsClient.WriteFile(Handle, offset, source));
}
}
public Result Commit()
{
lock (Locker)
{
Result rc = Initialize();
if (rc.IsFailure())
{
return(rc);
}
rc = EnsureKvDatabaseLoaded(false);
if (rc.IsFailure())
{
return(rc);
}
var mount = new Mounter();
try
{
rc = mount.Initialize(FsClient, MountName, SpaceId, SaveDataId);
if (rc.IsFailure())
{
return(rc);
}
rc = KvDatabase.WriteDatabaseToFile();
if (rc.IsFailure())
{
return(rc);
}
string idFilePath = $"{MountName}:/{LastIdFileName}";
rc = FsClient.OpenFile(out FileHandle handle, idFilePath, OpenMode.Write);
if (rc.IsFailure())
{
return(rc);
}
bool fileAlreadyClosed = false;
try
{
ulong lastId = LastPublishedId;
rc = FsClient.WriteFile(handle, 0, SpanHelpers.AsByteSpan(ref lastId), WriteOption.None);
if (rc.IsFailure())
{
return(rc);
}
rc = FsClient.FlushFile(handle);
if (rc.IsFailure())
{
return(rc);
}
FsClient.CloseFile(handle);
fileAlreadyClosed = true;
return(FsClient.Commit(MountName));
}
finally
{
if (!fileAlreadyClosed)
{
FsClient.CloseFile(handle);
}
}
}
finally
{
mount.Dispose();
}
}
}