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git.proxmox.com Git - mirror_qemu.git/blob - include/qemu/compiler.h
6 #if defined __clang_analyzer__ || defined __COVERITY__
7 #define QEMU_STATIC_ANALYSIS 1
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))
18 # define QEMU_GNUC_PREREQ(maj, min) 0
21 #define QEMU_NORETURN __attribute__ ((__noreturn__))
23 #if QEMU_GNUC_PREREQ(3, 4)
24 #define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
26 #define QEMU_WARN_UNUSED_RESULT
29 #if QEMU_GNUC_PREREQ(4, 0)
30 #define QEMU_SENTINEL __attribute__((sentinel))
35 #if QEMU_GNUC_PREREQ(4, 3)
36 #define QEMU_ARTIFICIAL __attribute__((always_inline, artificial))
38 #define QEMU_ARTIFICIAL
42 # define QEMU_PACKED __attribute__((gcc_struct, packed))
44 # define QEMU_PACKED __attribute__((packed))
47 #define QEMU_ALIGNED(X) __attribute__((aligned(X)))
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
58 #define __builtin_expect(x, n) (x)
61 #define likely(x) __builtin_expect(!!(x), 1)
62 #define unlikely(x) __builtin_expect(!!(x), 0)
66 #define container_of(ptr, type, member) ({ \
67 const typeof(((type *) 0)->member) *__mptr = (ptr); \
68 (type *) ((char *) __mptr - offsetof(type, member));})
71 /* Convert from a base type to a parent type, with compile time checking. */
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);}))
78 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
81 #define typeof_field(type, field) typeof(((type *)0)->field)
82 #define type_check(t1,t2) ((t1*)0 - (t2*)0)
84 #define QEMU_BUILD_BUG_ON(x) \
85 typedef char glue(qemu_build_bug_on__,__LINE__)[(x)?-1:1] __attribute__((unused));
88 # if !QEMU_GNUC_PREREQ(4, 4)
89 /* gcc versions before 4.4.x don't support gnu_printf, so use printf. */
90 # define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))
92 /* Use gnu_printf when supported (qemu uses standard format strings). */
93 # define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
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__
101 #define GCC_FMT_ATTR(n, m)
104 #endif /* COMPILER_H */