aboutsummaryrefslogtreecommitdiffstats
path: root/osdep.h
blob: d6d81104c142929f535fd3dab91859a47ff75bcd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
#ifndef QEMU_OSDEP_H
#define QEMU_OSDEP_H

#include <stdarg.h>
#include <stddef.h>
#ifdef __OpenBSD__
#include <sys/types.h>
#include <sys/signal.h>
#endif

#include <sys/time.h>

#ifndef glue
#define xglue(x, y) x ## y
#define glue(x, y) xglue(x, y)
#define stringify(s)	tostring(s)
#define tostring(s)	#s
#endif

#ifndef likely
#if __GNUC__ < 3
#define __builtin_expect(x, n) (x)
#endif

#define likely(x)   __builtin_expect(!!(x), 1)
#define unlikely(x)   __builtin_expect(!!(x), 0)
#endif

#ifdef CONFIG_NEED_OFFSETOF
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
#endif
#ifndef container_of
#define container_of(ptr, type, member) ({                      \
        const typeof(((type *) 0)->member) *__mptr = (ptr);     \
        (type *) ((char *) __mptr - offsetof(type, member));})
#endif

/* Convert from a base type to a parent type, with compile time checking.  */
#ifdef __GNUC__
#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
    char __attribute__((unused)) offset_must_be_zero[ \
        -offsetof(type, field)]; \
    container_of(dev, type, field);}))
#else
#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
#endif

#define typeof_field(type, field) typeof(((type *)0)->field)
#define type_check(t1,t2) ((t1*)0 - (t2*)0)

#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif

#ifndef DIV_ROUND_UP
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
#endif

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif

#ifndef always_inline
#if !((__GNUC__ < 3) || defined(__APPLE__))
#ifdef __OPTIMIZE__
#define inline __attribute__ (( always_inline )) __inline__
#endif
#endif
#else
#define inline always_inline
#endif

#ifdef __i386__
#define REGPARM __attribute((regparm(3)))
#else
#define REGPARM
#endif

#define qemu_printf printf

#if defined (__GNUC__) && defined (__GNUC_MINOR__)
# define QEMU_GNUC_PREREQ(maj, min) \
         ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
# define QEMU_GNUC_PREREQ(maj, min) 0
#endif

void *qemu_memalign(size_t alignment, size_t size);
void *qemu_vmalloc(size_t size);
void qemu_vfree(void *ptr);

#define QEMU_MADV_INVALID -1

#if defined(CONFIG_MADVISE)

#define QEMU_MADV_WILLNEED  MADV_WILLNEED
#define QEMU_MADV_DONTNEED  MADV_DONTNEED
#ifdef MADV_DONTFORK
#define QEMU_MADV_DONTFORK  MADV_DONTFORK
#else
#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
#endif
#ifdef MADV_MERGEABLE
#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
#else
#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
#endif

#elif defined(CONFIG_POSIX_MADVISE)

#define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
#define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID

#else /* no-op */

#define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
#define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID

#endif

int qemu_madvise(void *addr, size_t len, int advice);

int qemu_create_pidfile(const char *filename);
int qemu_get_thread_id(void);

#ifdef _WIN32
static inline void qemu_timersub(const struct timeval *val1,
                                 const struct timeval *val2,
                                 struct timeval *res)
{
    res->tv_sec = val1->tv_sec - val2->tv_sec;
    if (val1->tv_usec < val2->tv_usec) {
        res->tv_sec--;
        res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
    } else {
        res->tv_usec = val1->tv_usec - val2->tv_usec;
    }
}
#else
#define qemu_timersub timersub
#define ffs __builtin_ffs
#endif

#endif