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 void Dispose(bool disposing)
{
if (CloseHandle)
{
FsClient.CloseFile(Handle);
}
}
private Result ReadFile(out byte[] data)
{
Debug.Assert(FsClient != null);
Debug.Assert(!string.IsNullOrWhiteSpace(FileName));
data = default;
Result rc = FsClient.OpenFile(out FileHandle handle, FileName, OpenMode.Read);
if (rc.IsFailure())
{
return(rc);
}
rc = FsClient.GetFileSize(out long fileSize, handle);
if (rc.IsSuccess())
{
data = new byte[fileSize];
rc = FsClient.ReadFile(handle, 0, data);
}
FsClient.CloseFile(handle);
return(rc);
}
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();
}
}
}
