Line data    Source code

       1             : // Copyright 2023 The LevelDB-Go and Pebble Authors. All rights reserved. Use
       2             : // of this source code is governed by a BSD-style license that can be found in
       3             : // the LICENSE file.
       4             : 
       5             : package objstorage
       6             : 
       7             : import "context"
       8             : 
       9             : // NoopReadHandle can be used by Readable implementations that don't
      10             : // support read-ahead.
      11             : type NoopReadHandle struct {
      12             :         readable Readable
      13             : }
      14             : 
      15             : // MakeNoopReadHandle initializes a NoopReadHandle.
      16           1 : func MakeNoopReadHandle(r Readable) NoopReadHandle {
      17           1 :         return NoopReadHandle{readable: r}
      18           1 : }
      19             : 
      20             : var _ ReadHandle = (*NoopReadHandle)(nil)
      21             : 
      22             : // ReadAt is part of the ReadHandle interface.
      23           1 : func (h *NoopReadHandle) ReadAt(ctx context.Context, p []byte, off int64) error {
      24           1 :         return h.readable.ReadAt(ctx, p, off)
      25           1 : }
      26             : 
      27             : // Close is part of the ReadHandle interface.
      28           1 : func (*NoopReadHandle) Close() error { return nil }
      29             : 
      30             : // SetupForCompaction is part of the ReadHandle interface.
      31           1 : func (*NoopReadHandle) SetupForCompaction() {}
      32             : 
      33             : // RecordCacheHit is part of the ReadHandle interface.
      34           1 : func (*NoopReadHandle) RecordCacheHit(_ context.Context, offset, size int64) {}