1 files changed, 26 insertions, 0 deletions
diff --git a/src/rocksdb/util/hash128.h b/src/rocksdb/util/hash128.h
new file mode 100644
index 000000000..305caa14a
--- /dev/null
+++ b/src/rocksdb/util/hash128.h
@@ -0,0 +1,26 @@
+//  Copyright (c) Facebook, Inc. and its affiliates. 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
+
+// 128-bit hash gets it own header so that more popular hash.h doesn't
+// depend on math128.h
+
+#include "rocksdb/slice.h"
+#include "util/math128.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+// Stable/persistent 128-bit hash for non-cryptographic applications.
+Unsigned128 Hash128(const char* data, size_t n, uint64_t seed);
+
+// Specific optimization without seed (same as seed = 0)
+Unsigned128 Hash128(const char* data, size_t n);
+
+inline Unsigned128 GetSliceHash128(const Slice& key) {
+  return Hash128(key.data(), key.size());
+}
+
+}  // namespace ROCKSDB_NAMESPACE