UCX
1.6
Unified Communication X
Main Page
Related Pages
Programming Interface
Data Structures
Examples
compiler_def.h
1
9
#ifndef UCS_COMPILER_DEF_H
10
#define UCS_COMPILER_DEF_H
11
12
/* Note: Place "@file <file name>.h" after BEGIN_C_DECS
13
* to avoid bugs in a documentation */
14
#ifdef __cplusplus
15
# define BEGIN_C_DECLS extern "C" {
16
# define END_C_DECLS }
17
#else
18
# define BEGIN_C_DECLS
19
# define END_C_DECLS
20
#endif
21
22
/*
23
* Assertions which are checked in compile-time
24
*
25
* Usage: UCS_STATIC_ASSERT(condition)
26
*/
27
#define UCS_STATIC_ASSERT(_cond) \
28
switch(0) {case 0:case (_cond):;}
29
30
/* Aliasing structure */
31
#define UCS_S_MAY_ALIAS __attribute__((may_alias))
32
33
/* A function without side effects */
34
#define UCS_F_PURE __attribute__((pure))
35
36
/* A function which does not return */
37
#define UCS_F_NORETURN __attribute__((noreturn))
38
39
/* Packed structure */
40
#define UCS_S_PACKED __attribute__((packed))
41
42
/* Avoid inlining the function */
43
#define UCS_F_NOINLINE __attribute__ ((noinline))
44
45
/* Shared library constructor and destructor */
46
#define UCS_F_CTOR __attribute__((constructor))
47
#define UCS_F_DTOR __attribute__((destructor))
48
49
/* Silence "defined but not used" error for static function */
50
#define UCS_F_MAYBE_UNUSED __attribute__((used))
51
52
/* Always inline the function */
53
#ifdef __GNUC__
54
#define UCS_F_ALWAYS_INLINE inline __attribute__ ((always_inline))
55
#else
56
#define UCS_F_ALWAYS_INLINE inline
57
#endif
58
59
/* Silence "uninitialized variable" for stupid compilers (gcc 4.1)
60
* which can't optimize properly.
61
*/
62
#if (((__GNUC__ == 4) && (__GNUC_MINOR__ == 1)) || !defined(__OPTIMIZE__))
63
# define UCS_V_INITIALIZED(_v) (_v = (typeof(_v))0)
64
#else
65
# define UCS_V_INITIALIZED(_v) ((void)0)
66
#endif
67
68
/* The i-th bit */
69
#define UCS_BIT(i) (1ul << (i))
70
71
/* Mask of bits 0..i-1 */
72
#define UCS_MASK(i) (UCS_BIT(i) - 1)
73
74
/*
75
* Enable compiler checks for printf-like formatting.
76
*
77
* @param fmtargN number of formatting argument
78
* @param vargN number of variadic argument
79
*/
80
#define UCS_F_PRINTF(fmtargN, vargN) __attribute__((format(printf, fmtargN, vargN)))
81
82
/* Unused variable */
83
#define UCS_V_UNUSED __attribute__((unused))
84
85
/* Aligned variable */
86
#define UCS_V_ALIGNED(_align) __attribute__((aligned(_align)))
87
88
/* Used for labels */
89
#define UCS_EMPTY_STATEMENT {}
90
91
/* Helper macro for address arithmetic in bytes */
92
#define UCS_PTR_BYTE_OFFSET(_ptr, _offset) \
93
((void *)((uintptr_t)(_ptr) + (_offset)))
94
98
#define ucs_static_array_size(_array) \
99
({ \
100
UCS_STATIC_ASSERT((void*)&(_array) == (void*)&((_array)[0])); \
101
( sizeof(_array) / sizeof((_array)[0]) ); \
102
})
103
107
#define ucs_offsetof(_type, _member) \
108
((unsigned long)&( ((_type*)0)->_member ))
109
119
#define ucs_container_of(_ptr, _type, _member) \
120
( (_type*)( (char*)(void*)(_ptr) - ucs_offsetof(_type, _member) ) )
121
122
128
#define ucs_derived_of(_ptr, _type) \
129
({\
130
UCS_STATIC_ASSERT(offsetof(_type, super) == 0) \
131
ucs_container_of(_ptr, _type, super); \
132
})
133
137
#define ucs_field_sizeof(_type, _field) \
138
sizeof(((_type*)0)->_field)
139
143
#define ucs_compiler_fence() asm volatile(""::: "memory")
144
148
#define ucs_prefetch(p) __builtin_prefetch(p)
149
150
/* Branch prediction */
151
#define ucs_likely(x) __builtin_expect(x, 1)
152
#define ucs_unlikely(x) __builtin_expect(x, 0)
153
154
/* Check if an expression is a compile-time constant */
155
#define ucs_is_constant(expr) __builtin_constant_p(expr)
156
157
#endif
/* UCS_COMPILER_DEF_H */
src
ucs
sys
compiler_def.h
Generated on Thu Jul 18 2019 11:16:37 for UCX by
1.8.10