ReactOS 0.4.17-dev-736-g75e91de
compiler.h
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1#pragma once
2
3/*
4 * Compiler-specific attributes/macros go here. This is the default placeholder
5 * that should work for MSVC/GCC/clang.
6 */
7
8#ifdef UACPI_OVERRIDE_COMPILER
9#include "uacpi_compiler.h"
10#else
11
12#define UACPI_ALIGN(x) __declspec(align(x))
13
14#if defined(__WATCOMC__)
15#define UACPI_STATIC_ASSERT(expr, msg)
16#elif defined(__cplusplus)
17#define UACPI_STATIC_ASSERT static_assert
18#else
19#define UACPI_STATIC_ASSERT _Static_assert
20#endif
21
22#ifdef _MSC_VER
23 #include <intrin.h>
24
25 #define UACPI_ALWAYS_INLINE __forceinline
26
27 #define UACPI_PACKED(decl) \
28 __pragma(pack(push, 1)) \
29 decl; \
30 __pragma(pack(pop))
31#elif defined(__WATCOMC__)
32 #define UACPI_ALWAYS_INLINE inline
33 #define UACPI_PACKED(decl) _Packed decl;
34#else
35 #define UACPI_ALWAYS_INLINE inline __attribute__((always_inline))
36 #define UACPI_PACKED(decl) decl __attribute__((packed));
37#endif
38
39#if defined(__GNUC__) || defined(__clang__)
40 #define uacpi_unlikely(expr) __builtin_expect(!!(expr), 0)
41 #define uacpi_likely(expr) __builtin_expect(!!(expr), 1)
42
43 #ifdef __has_attribute
44 #if __has_attribute(__fallthrough__)
45 #define UACPI_FALLTHROUGH __attribute__((__fallthrough__))
46 #endif
47 #endif
48
49 #define UACPI_MAYBE_UNUSED __attribute__ ((unused))
50
51 #define UACPI_NO_UNUSED_PARAMETER_WARNINGS_BEGIN \
52 _Pragma("GCC diagnostic push") \
53 _Pragma("GCC diagnostic ignored \"-Wunused-parameter\"")
54
55 #define UACPI_NO_UNUSED_PARAMETER_WARNINGS_END \
56 _Pragma("GCC diagnostic pop")
57
58 #ifdef __clang__
59 #define UACPI_PRINTF_DECL(fmt_idx, args_idx) \
60 __attribute__((format(printf, fmt_idx, args_idx)))
61 #else
62 #define UACPI_PRINTF_DECL(fmt_idx, args_idx) \
63 __attribute__((format(gnu_printf, fmt_idx, args_idx)))
64 #endif
65
66 #define UACPI_COMPILER_HAS_BUILTIN_MEMCPY
67 #define UACPI_COMPILER_HAS_BUILTIN_MEMMOVE
68 #define UACPI_COMPILER_HAS_BUILTIN_MEMSET
69 #define UACPI_COMPILER_HAS_BUILTIN_MEMCMP
70#elif defined(__WATCOMC__)
71 #define uacpi_unlikely(expr) expr
72 #define uacpi_likely(expr) expr
73
74 /*
75 * The OpenWatcom documentation suggests this should be done using
76 * _Pragma("off (unreferenced)") and _Pragma("pop (unreferenced)"),
77 * but these pragmas appear to be no-ops. Use inline as the next best thing.
78 * Note that OpenWatcom accepts redundant modifiers without a warning,
79 * so UACPI_MAYBE_UNUSED inline still works.
80 */
81 #define UACPI_MAYBE_UNUSED inline
82
83 #define UACPI_NO_UNUSED_PARAMETER_WARNINGS_BEGIN
84 #define UACPI_NO_UNUSED_PARAMETER_WARNINGS_END
85
86 #define UACPI_PRINTF_DECL(fmt_idx, args_idx)
87#else
88 #define uacpi_unlikely(expr) expr
89 #define uacpi_likely(expr) expr
90
91 #define UACPI_MAYBE_UNUSED
92
93 #define UACPI_NO_UNUSED_PARAMETER_WARNINGS_BEGIN
94 #define UACPI_NO_UNUSED_PARAMETER_WARNINGS_END
95
96 #define UACPI_PRINTF_DECL(fmt_idx, args_idx)
97#endif
98
99#ifndef UACPI_FALLTHROUGH
100 #define UACPI_FALLTHROUGH do {} while (0)
101#endif
102
103#ifndef UACPI_POINTER_SIZE
104 #ifdef _WIN32
105 #ifdef _WIN64
106 #define UACPI_POINTER_SIZE 8
107 #else
108 #define UACPI_POINTER_SIZE 4
109 #endif
110 #elif defined(__GNUC__)
111 #define UACPI_POINTER_SIZE __SIZEOF_POINTER__
112 #elif defined(__WATCOMC__)
113 #ifdef __386__
114 #define UACPI_POINTER_SIZE 4
115 #elif defined(__I86__)
116 #error uACPI does not support 16-bit mode compilation
117 #else
118 #error Unknown target architecture
119 #endif
120 #else
121 #error Failed to detect pointer size
122 #endif
123#endif
124
125#endif