Thrill  0.1
likely.hpp
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1 /*******************************************************************************
2  * tlx/define/likely.hpp
3  *
4  * Part of tlx - http://panthema.net/tlx
5  *
6  * Copyright (C) 2015-2017 Timo Bingmann <[email protected]>
7  *
8  * All rights reserved. Published under the Boost Software License, Version 1.0
9  ******************************************************************************/
10 
11 #ifndef TLX_DEFINE_LIKELY_HEADER
12 #define TLX_DEFINE_LIKELY_HEADER
13 
14 namespace tlx {
15 
16 //! \addtogroup tlx_define
17 //! \{
18 
19 #if defined(__GNUC__) || defined(__clang__)
20 #define TLX_LIKELY(c) __builtin_expect((c), 1)
21 #define TLX_UNLIKELY(c) __builtin_expect((c), 0)
22 #else
23 #define TLX_LIKELY(c) c
24 #define TLX_UNLIKELY(c) c
25 #endif
26 
27 //! \}
28 
29 } // namespace tlx
30 
31 #endif // !TLX_DEFINE_LIKELY_HEADER
32 
33 /******************************************************************************/