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Diffstat (limited to 'src/rocksdb/port/likely.h')
| -rw-r--r-- | src/rocksdb/port/likely.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/rocksdb/port/likely.h b/src/rocksdb/port/likely.h new file mode 100644 index 000000000..0bd90d701 --- /dev/null +++ b/src/rocksdb/port/likely.h @@ -0,0 +1,18 @@ +// 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). +// +// Copyright (c) 2011 The LevelDB Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. See the AUTHORS file for names of contributors. + +#pragma once + +#if defined(__GNUC__) && __GNUC__ >= 4 +#define LIKELY(x) (__builtin_expect((x), 1)) +#define UNLIKELY(x) (__builtin_expect((x), 0)) +#else +#define LIKELY(x) (x) +#define UNLIKELY(x) (x) +#endif |