xref: /illumos-kvm-cmd/osdep.h (revision 68396ea9)
1 #ifndef QEMU_OSDEP_H
2 #define QEMU_OSDEP_H
3 
4 #include <stdarg.h>
5 #include <stddef.h>
6 #ifdef __OpenBSD__
7 #include <sys/types.h>
8 #include <sys/signal.h>
9 #endif
10 
11 #ifndef _WIN32
12 #include <sys/time.h>
13 #endif
14 
15 #ifndef glue
16 #define xglue(x, y) x ## y
17 #define glue(x, y) xglue(x, y)
18 #define stringify(s)	tostring(s)
19 #define tostring(s)	#s
20 #endif
21 
22 #ifndef likely
23 #if __GNUC__ < 3
24 #define __builtin_expect(x, n) (x)
25 #endif
26 
27 #define likely(x)   __builtin_expect(!!(x), 1)
28 #define unlikely(x)   __builtin_expect(!!(x), 0)
29 #endif
30 
31 #ifdef CONFIG_NEED_OFFSETOF
32 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
33 #endif
34 #ifndef container_of
35 #define container_of(ptr, type, member) ({                      \
36         const typeof(((type *) 0)->member) *__mptr = (ptr);     \
37         (type *) ((char *) __mptr - offsetof(type, member));})
38 #endif
39 
40 /* Convert from a base type to a parent type, with compile time checking.  */
41 #ifdef __GNUC__
42 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
43     char __attribute__((unused)) offset_must_be_zero[ \
44         -offsetof(type, field)]; \
45     container_of(dev, type, field);}))
46 #else
47 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
48 #endif
49 
50 #define typeof_field(type, field) typeof(((type *)0)->field)
51 #define type_check(t1,t2) ((t1*)0 - (t2*)0)
52 
53 #ifndef MIN
54 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
55 #endif
56 #ifndef MAX
57 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
58 #endif
59 
60 #ifndef ARRAY_SIZE
61 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
62 #endif
63 
64 #ifndef always_inline
65 #if !((__GNUC__ < 3) || defined(__APPLE__))
66 #ifdef __OPTIMIZE__
67 #define inline __attribute__ (( always_inline )) __inline__
68 #endif
69 #endif
70 #else
71 #define inline always_inline
72 #endif
73 
74 #ifdef __i386__
75 #define REGPARM __attribute((regparm(3)))
76 #else
77 #define REGPARM
78 #endif
79 
80 #define qemu_printf printf
81 
82 #if defined (__GNUC__) && defined (__GNUC_MINOR__)
83 # define QEMU_GNUC_PREREQ(maj, min) \
84          ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
85 #else
86 # define QEMU_GNUC_PREREQ(maj, min) 0
87 #endif
88 
89 void *qemu_memalign(size_t alignment, size_t size);
90 void *qemu_vmalloc(size_t size);
91 void qemu_vfree(void *ptr);
92 
93 #define QEMU_MADV_INVALID -1
94 
95 #if defined(CONFIG_MADVISE)
96 
97 #define QEMU_MADV_WILLNEED  MADV_WILLNEED
98 #define QEMU_MADV_DONTNEED  MADV_DONTNEED
99 #ifdef MADV_DONTFORK
100 #define QEMU_MADV_DONTFORK  MADV_DONTFORK
101 #else
102 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
103 #endif
104 #ifdef MADV_MERGEABLE
105 #define QEMU_MADV_MERGEABLE MADV_MERGEABLE
106 #else
107 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
108 #endif
109 
110 #elif defined(CONFIG_POSIX_MADVISE)
111 
112 #define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
113 #define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
114 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
115 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
116 
117 #else /* no-op */
118 
119 #define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
120 #define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
121 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
122 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
123 
124 #endif
125 
126 int qemu_madvise(void *addr, size_t len, int advice);
127 
128 int qemu_create_pidfile(const char *filename);
129 
130 #endif
131