aGrUM  0.18.1
a C++ library for (probabilistic) graphical models
inline.h
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1 
39 #ifndef GUM_INLINE_H
40 #define GUM_INLINE_H
41 
42 #ifndef DOXYGEN_SHOULD_SKIP_THIS
43 
44 # ifndef GUM_NO_INLINE
45 
46 # define INLINE inline
47 
48 // ENFORCED_INLINE is a stronger version of the inline, using forceinline__ on
49 // MSVC, but it still doesn't use GCC's always_inline. This is useful in
50 // (common) situations where MSVC needs forceinline but GCC is still doing fine
51 // with just inline. (from eigen library)
52 # if (defined _MSC_VER) || (defined INTEL_COMPILER__)
53 # define ENFORCED_INLINE __forceinline
54 # else
55 # define ENFORCED_INLINE inline
56 # endif
57 
58 // ALWAYS_INLINE is the strongest, it has the effect of making the function
59 // inline and adding every possible attribute to maximize inlining. This should
60 // only be used when really necessary: in particular, it uses
61 // __attribute__((always_inline)) on GCC, which most of the time is useless and
62 // can severely harm compile times.
63 // @warning with the always_inline attribute, gcc 3.4.x reports the following
64 // compilation error:
65 // Eval.h:91: sorry, unimplemented: inlining failed in call to '...' :
66 // function body not available (from eigen library)
67 # if GNUC_AT_LEAST(4, 0)
68 # define ALWAYS_INLINE __attribute__((always_inline)) inline
69 # else
70 # define ALWAYS_INLINE ENFORCED_INLINE
71 # endif
72 
73 # if (defined __GNUC__)
74 # define NO_INLINE __attribute__((noinline))
75 # elif (defined _MSC_VER)
76 # define NEVER_INLINE declspec__(noinline)
77 # else
78 # define NEVER_INLINE
79 # endif
80 # else // GUM_NO_INLINE
81 # define INLINE
82 # define STRONG_INLINE
83 # define ALWAYS_INLINE
84 # define NEVER_INLINE
85 # endif /* GUM_NO_INLINE */
86 
87 #endif /* DOXYGEN_SHOULD_SKIP_THIS */
88 
89 #endif /* GUM_INLINE_H */