Initial commit

vendor/github.com/cockroachdb/pebble/objstorage/noop_readahead.go

@@ -0,0 +1,34 @@
+// Copyright 2023 The LevelDB-Go and Pebble Authors. All rights reserved. Use
+// of this source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+package objstorage
+
+import "context"
+
+// NoopReadHandle can be used by Readable implementations that don't
+// support read-ahead.
+type NoopReadHandle struct {
+	readable Readable
+}
+
+// MakeNoopReadHandle initializes a NoopReadHandle.
+func MakeNoopReadHandle(r Readable) NoopReadHandle {
+	return NoopReadHandle{readable: r}
+}
+
+var _ ReadHandle = (*NoopReadHandle)(nil)
+
+// ReadAt is part of the ReadHandle interface.
+func (h *NoopReadHandle) ReadAt(ctx context.Context, p []byte, off int64) error {
+	return h.readable.ReadAt(ctx, p, off)
+}
+
+// Close is part of the ReadHandle interface.
+func (*NoopReadHandle) Close() error { return nil }
+
+// SetupForCompaction is part of the ReadHandle interface.
+func (*NoopReadHandle) SetupForCompaction() {}
+
+// RecordCacheHit is part of the ReadHandle interface.
+func (*NoopReadHandle) RecordCacheHit(_ context.Context, offset, size int64) {}