Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/rocksdb/db/write_callback.h b/src/rocksdb/db/write_callback.h
new file mode 100644
index 000000000..106d02041
--- /dev/null
+++ b/src/rocksdb/db/write_callback.h
@@ -0,0 +1,27 @@
+// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#pragma once
+
+#include "rocksdb/status.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+class DB;
+
+class WriteCallback {
+ public:
+  virtual ~WriteCallback() {}
+
+  // Will be called while on the write thread before the write executes.  If
+  // this function returns a non-OK status, the write will be aborted and this
+  // status will be returned to the caller of DB::Write().
+  virtual Status Callback(DB* db) = 0;
+
+  // return true if writes with this callback can be batched with other writes
+  virtual bool AllowWriteBatching() = 0;
+};
+
+}  // namespace ROCKSDB_NAMESPACE