64324e329e
Summary: As you know, almost all compilers support "pragma once" keyword instead of using include guards. To be keep consistency between header files, all header files are edited. Besides this, try to fix some warnings about loss of data. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4339 Differential Revision: D9654990 Pulled By: ajkr fbshipit-source-id: c2cf3d2d03a599847684bed81378c401920ca848
19 lines
690 B
C
19 lines
690 B
C
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once
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#if defined(__GNUC__) && __GNUC__ >= 4
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#define LIKELY(x) (__builtin_expect((x), 1))
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#define UNLIKELY(x) (__builtin_expect((x), 0))
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#else
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#define LIKELY(x) (x)
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#define UNLIKELY(x) (x)
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#endif
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