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#ifndef glue
14#define xglue(x, y) x ## y
15#define glue(x, y) xglue(x, y)
16#define stringify(s)	tostring(s)
17#define tostring(s)	#s
18#endif
19
20#ifndef likely
21#if __GNUC__ < 3
22#define __builtin_expect(x, n) (x)
23#endif
24
25#define likely(x)   __builtin_expect(!!(x), 1)
26#define unlikely(x)   __builtin_expect(!!(x), 0)
27#endif
28
29#ifdef CONFIG_NEED_OFFSETOF
30#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
31#endif
32#ifndef container_of
33#define container_of(ptr, type, member) ({                      \
34        const typeof(((type *) 0)->member) *__mptr = (ptr);     \
35        (type *) ((char *) __mptr - offsetof(type, member));})
36#endif
37
38/* Convert from a base type to a parent type, with compile time checking.  */
39#ifdef __GNUC__
40#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
41    char __attribute__((unused)) offset_must_be_zero[ \
42        -offsetof(type, field)]; \
43    container_of(dev, type, field);}))
44#else
45#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
46#endif
47
48#define typeof_field(type, field) typeof(((type *)0)->field)
49#define type_check(t1,t2) ((t1*)0 - (t2*)0)
50
51#ifndef MIN
52#define MIN(a, b) (((a) < (b)) ? (a) : (b))
53#endif
54#ifndef MAX
55#define MAX(a, b) (((a) > (b)) ? (a) : (b))
56#endif
57
58#ifndef DIV_ROUND_UP
59#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
60#endif
61
62#ifndef ARRAY_SIZE
63#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
64#endif
65
66#ifndef always_inline
67#if !((__GNUC__ < 3) || defined(__APPLE__))
68#ifdef __OPTIMIZE__
69#define inline __attribute__ (( always_inline )) __inline__
70#endif
71#endif
72#else
73#define inline always_inline
74#endif
75
76#ifdef __i386__
77#define REGPARM __attribute((regparm(3)))
78#else
79#define REGPARM
80#endif
81
82#define qemu_printf printf
83
84#if defined (__GNUC__) && defined (__GNUC_MINOR__)
85# define QEMU_GNUC_PREREQ(maj, min) \
86         ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
87#else
88# define QEMU_GNUC_PREREQ(maj, min) 0
89#endif
90
91void *qemu_memalign(size_t alignment, size_t size);
92void *qemu_vmalloc(size_t size);
93void qemu_vfree(void *ptr);
94
95#define QEMU_MADV_INVALID -1
96
97#if defined(CONFIG_MADVISE)
98
99#define QEMU_MADV_WILLNEED  MADV_WILLNEED
100#define QEMU_MADV_DONTNEED  MADV_DONTNEED
101#ifdef MADV_DONTFORK
102#define QEMU_MADV_DONTFORK  MADV_DONTFORK
103#else
104#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
105#endif
106#ifdef MADV_MERGEABLE
107#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
108#else
109#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
110#endif
111
112#elif defined(CONFIG_POSIX_MADVISE)
113
114#define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
115#define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
116#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
117#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
118
119#else /* no-op */
120
121#define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
122#define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
123#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
124#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
125
126#endif
127
128int qemu_madvise(void *addr, size_t len, int advice);
129
130int qemu_create_pidfile(const char *filename);
131int qemu_get_thread_id(void);
132
133#ifdef _WIN32
134static 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#define ffs __builtin_ffs
149#endif
150
151#endif
152