block: implement is_allocated for raw
[qemu.git] / osdep.h
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 #include <sys/time.h>
12
13 #if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
14 /* [u]int_fast*_t not in <sys/int_types.h> */
15 typedef unsigned char uint_fast8_t;
16 typedef unsigned int uint_fast16_t;
17 typedef signed int int_fast16_t;
18 #endif
19
20 #ifndef glue
21 #define xglue(x, y) x ## y
22 #define glue(x, y) xglue(x, y)
23 #define stringify(s) tostring(s)
24 #define tostring(s) #s
25 #endif
26
27 #ifndef likely
28 #if __GNUC__ < 3
29 #define __builtin_expect(x, n) (x)
30 #endif
31
32 #define likely(x) __builtin_expect(!!(x), 1)
33 #define unlikely(x) __builtin_expect(!!(x), 0)
34 #endif
35
36 #ifndef container_of
37 #define container_of(ptr, type, member) ({ \
38 const typeof(((type *) 0)->member) *__mptr = (ptr); \
39 (type *) ((char *) __mptr - offsetof(type, member));})
40 #endif
41
42 /* Convert from a base type to a parent type, with compile time checking. */
43 #ifdef __GNUC__
44 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
45 char __attribute__((unused)) offset_must_be_zero[ \
46 -offsetof(type, field)]; \
47 container_of(dev, type, field);}))
48 #else
49 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
50 #endif
51
52 #define typeof_field(type, field) typeof(((type *)0)->field)
53 #define type_check(t1,t2) ((t1*)0 - (t2*)0)
54
55 #ifndef MIN
56 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
57 #endif
58 #ifndef MAX
59 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
60 #endif
61
62 #ifndef DIV_ROUND_UP
63 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
64 #endif
65
66 #ifndef ARRAY_SIZE
67 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
68 #endif
69
70 #ifndef always_inline
71 #if !((__GNUC__ < 3) || defined(__APPLE__))
72 #ifdef __OPTIMIZE__
73 #define inline __attribute__ (( always_inline )) __inline__
74 #endif
75 #endif
76 #else
77 #define inline always_inline
78 #endif
79
80 #define qemu_printf printf
81
82 int qemu_daemon(int nochdir, int noclose);
83 void *qemu_memalign(size_t alignment, size_t size);
84 void *qemu_vmalloc(size_t size);
85 void qemu_vfree(void *ptr);
86
87 #define QEMU_MADV_INVALID -1
88
89 #if defined(CONFIG_MADVISE)
90
91 #define QEMU_MADV_WILLNEED MADV_WILLNEED
92 #define QEMU_MADV_DONTNEED MADV_DONTNEED
93 #ifdef MADV_DONTFORK
94 #define QEMU_MADV_DONTFORK MADV_DONTFORK
95 #else
96 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
97 #endif
98 #ifdef MADV_MERGEABLE
99 #define QEMU_MADV_MERGEABLE MADV_MERGEABLE
100 #else
101 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
102 #endif
103
104 #elif defined(CONFIG_POSIX_MADVISE)
105
106 #define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED
107 #define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED
108 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
109 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
110
111 #else /* no-op */
112
113 #define QEMU_MADV_WILLNEED QEMU_MADV_INVALID
114 #define QEMU_MADV_DONTNEED QEMU_MADV_INVALID
115 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
116 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
117
118 #endif
119
120 int qemu_madvise(void *addr, size_t len, int advice);
121
122 #if defined(__HAIKU__) && defined(__i386__)
123 #define FMT_pid "%ld"
124 #elif defined(WIN64)
125 #define FMT_pid "%" PRId64
126 #else
127 #define FMT_pid "%d"
128 #endif
129
130 int qemu_create_pidfile(const char *filename);
131 int qemu_get_thread_id(void);
132
133 #ifdef _WIN32
134 static inline void qemu_timersub(const struct timeval *val1,
135 const struct timeval *val2,
136 struct timeval *res)
137 {
138 res->tv_sec = val1->tv_sec - val2->tv_sec;
139 if (val1->tv_usec < val2->tv_usec) {
140 res->tv_sec--;
141 res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
142 } else {
143 res->tv_usec = val1->tv_usec - val2->tv_usec;
144 }
145 }
146 #else
147 #define qemu_timersub timersub
148 #endif
149
150 void qemu_set_cloexec(int fd);
151
152 #endif