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Commit | Line | Data |
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5c026320 LC |
1 | /* public domain */ |
2 | ||
3 | #ifndef COMPILER_H | |
4 | #define COMPILER_H | |
5 | ||
8bff06a0 PB |
6 | #if defined __clang_analyzer__ || defined __COVERITY__ |
7 | #define QEMU_STATIC_ANALYSIS 1 | |
8 | #endif | |
5c026320 | 9 | |
f8b72754 SW |
10 | /*---------------------------------------------------------------------------- |
11 | | The macro QEMU_GNUC_PREREQ tests for minimum version of the GNU C compiler. | |
12 | | The code is a copy of SOFTFLOAT_GNUC_PREREQ, see softfloat-macros.h. | |
13 | *----------------------------------------------------------------------------*/ | |
14 | #if defined(__GNUC__) && defined(__GNUC_MINOR__) | |
15 | # define QEMU_GNUC_PREREQ(maj, min) \ | |
16 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | |
17 | #else | |
18 | # define QEMU_GNUC_PREREQ(maj, min) 0 | |
19 | #endif | |
20 | ||
5c026320 | 21 | #define QEMU_NORETURN __attribute__ ((__noreturn__)) |
f8b72754 | 22 | |
87751797 | 23 | #if QEMU_GNUC_PREREQ(3, 4) |
5c026320 LC |
24 | #define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result)) |
25 | #else | |
26 | #define QEMU_WARN_UNUSED_RESULT | |
27 | #endif | |
28 | ||
a31bdae5 DB |
29 | #if QEMU_GNUC_PREREQ(4, 0) |
30 | #define QEMU_SENTINEL __attribute__((sentinel)) | |
31 | #else | |
32 | #define QEMU_SENTINEL | |
33 | #endif | |
34 | ||
58099c80 RH |
35 | #if QEMU_GNUC_PREREQ(4, 3) |
36 | #define QEMU_ARTIFICIAL __attribute__((always_inline, artificial)) | |
37 | #else | |
38 | #define QEMU_ARTIFICIAL | |
39 | #endif | |
40 | ||
0f7fdd34 SW |
41 | #if defined(_WIN32) |
42 | # define QEMU_PACKED __attribute__((gcc_struct, packed)) | |
43 | #else | |
44 | # define QEMU_PACKED __attribute__((packed)) | |
45 | #endif | |
46 | ||
911a4d22 EC |
47 | #define QEMU_ALIGNED(X) __attribute__((aligned(X))) |
48 | ||
49120868 PM |
49 | #ifndef glue |
50 | #define xglue(x, y) x ## y | |
51 | #define glue(x, y) xglue(x, y) | |
52 | #define stringify(s) tostring(s) | |
53 | #define tostring(s) #s | |
54 | #endif | |
55 | ||
56 | #ifndef likely | |
57 | #if __GNUC__ < 3 | |
58 | #define __builtin_expect(x, n) (x) | |
59 | #endif | |
60 | ||
61 | #define likely(x) __builtin_expect(!!(x), 1) | |
62 | #define unlikely(x) __builtin_expect(!!(x), 0) | |
63 | #endif | |
64 | ||
65 | #ifndef container_of | |
66 | #define container_of(ptr, type, member) ({ \ | |
67 | const typeof(((type *) 0)->member) *__mptr = (ptr); \ | |
68 | (type *) ((char *) __mptr - offsetof(type, member));}) | |
69 | #endif | |
70 | ||
71 | /* Convert from a base type to a parent type, with compile time checking. */ | |
72 | #ifdef __GNUC__ | |
73 | #define DO_UPCAST(type, field, dev) ( __extension__ ( { \ | |
74 | char __attribute__((unused)) offset_must_be_zero[ \ | |
75 | -offsetof(type, field)]; \ | |
76 | container_of(dev, type, field);})) | |
77 | #else | |
78 | #define DO_UPCAST(type, field, dev) container_of(dev, type, field) | |
79 | #endif | |
80 | ||
81 | #define typeof_field(type, field) typeof(((type *)0)->field) | |
82 | #define type_check(t1,t2) ((t1*)0 - (t2*)0) | |
83 | ||
5c026320 | 84 | #define QEMU_BUILD_BUG_ON(x) \ |
24134c4e | 85 | typedef char glue(qemu_build_bug_on__,__LINE__)[(x)?-1:1] __attribute__((unused)); |
5c026320 LC |
86 | |
87 | #if defined __GNUC__ | |
f8b72754 | 88 | # if !QEMU_GNUC_PREREQ(4, 4) |
5c026320 | 89 | /* gcc versions before 4.4.x don't support gnu_printf, so use printf. */ |
5c026320 LC |
90 | # define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m))) |
91 | # else | |
92 | /* Use gnu_printf when supported (qemu uses standard format strings). */ | |
5c026320 | 93 | # define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m))) |
95df51a4 SW |
94 | # if defined(_WIN32) |
95 | /* Map __printf__ to __gnu_printf__ because we want standard format strings | |
96 | * even when MinGW or GLib include files use __printf__. */ | |
97 | # define __printf__ __gnu_printf__ | |
98 | # endif | |
5c026320 LC |
99 | # endif |
100 | #else | |
5c026320 LC |
101 | #define GCC_FMT_ATTR(n, m) |
102 | #endif | |
103 | ||
104 | #endif /* COMPILER_H */ |