likely.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
 
/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
// $Id$
 
 
#ifndef ATHCONTAINERS_LIKELY_H
#define ATHCONTAINERS_LIKELY_H
 
 
#if __GNUC__ >= 4 || defined(__clang__)
# define ATHCONTAINERS_LIKELY(x)       __builtin_expect(!!(x), 1)
# define ATHCONTAINERS_UNLIKELY(x)     __builtin_expect(!!(x), 0)
#else
# define ATHCONTAINERS_LIKELY(x)   (x)
# define ATHCONTAINERS_UNLIKELY(x) (x)
#endif
 
 
#endif // not ATHCONTAINERS_LIKELY_H