1#ifndef QEMU_OSDEP_H
2#define QEMU_OSDEP_H
3
4#include "config-host.h"
5#include <stdarg.h>
6#include <stddef.h>
7#include <stdbool.h>
8#include <sys/types.h>
9#ifdef __OpenBSD__
10#include <sys/signal.h>
11#endif
12
13#ifndef _WIN32
14#include <sys/wait.h>
15#else
16#define WIFEXITED(x)   1
17#define WEXITSTATUS(x) (x)
18#endif
19
20#include <sys/time.h>
21
22#if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
23/* [u]int_fast*_t not in <sys/int_types.h> */
24typedef unsigned char           uint_fast8_t;
25typedef unsigned int            uint_fast16_t;
26typedef signed int              int_fast16_t;
27#endif
28
29#ifndef glue
30#define xglue(x, y) x ## y
31#define glue(x, y) xglue(x, y)
32#define stringify(s)	tostring(s)
33#define tostring(s)	#s
34#endif
35
36#ifndef likely
37#if __GNUC__ < 3
38#define __builtin_expect(x, n) (x)
39#endif
40
41#define likely(x)   __builtin_expect(!!(x), 1)
42#define unlikely(x)   __builtin_expect(!!(x), 0)
43#endif
44
45#ifndef container_of
46#define container_of(ptr, type, member) ({                      \
47        const typeof(((type *) 0)->member) *__mptr = (ptr);     \
48        (type *) ((char *) __mptr - offsetof(type, member));})
49#endif
50
51/* Convert from a base type to a parent type, with compile time checking.  */
52#ifdef __GNUC__
53#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
54    char __attribute__((unused)) offset_must_be_zero[ \
55        -offsetof(type, field)]; \
56    container_of(dev, type, field);}))
57#else
58#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
59#endif
60
61#define typeof_field(type, field) typeof(((type *)0)->field)
62#define type_check(t1,t2) ((t1*)0 - (t2*)0)
63
64#ifndef MIN
65#define MIN(a, b) (((a) < (b)) ? (a) : (b))
66#endif
67#ifndef MAX
68#define MAX(a, b) (((a) > (b)) ? (a) : (b))
69#endif
70
71#ifndef ROUND_UP
72#define ROUND_UP(n,d) (((n) + (d) - 1) & -(d))
73#endif
74
75#ifndef DIV_ROUND_UP
76#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
77#endif
78
79#ifndef ARRAY_SIZE
80#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
81#endif
82
83#ifndef always_inline
84#if !((__GNUC__ < 3) || defined(__APPLE__))
85#ifdef __OPTIMIZE__
86#undef inline
87#define inline __attribute__ (( always_inline )) __inline__
88#endif
89#endif
90#else
91#undef inline
92#define inline always_inline
93#endif
94
95#define qemu_printf printf
96
97int qemu_daemon(int nochdir, int noclose);
98void *qemu_memalign(size_t alignment, size_t size);
99void *qemu_vmalloc(size_t size);
100void *qemu_anon_ram_alloc(size_t size);
101void qemu_vfree(void *ptr);
102void qemu_anon_ram_free(void *ptr, size_t size);
103
104#define QEMU_MADV_INVALID -1
105
106#if defined(CONFIG_MADVISE)
107
108#define QEMU_MADV_WILLNEED  MADV_WILLNEED
109#define QEMU_MADV_DONTNEED  MADV_DONTNEED
110#ifdef MADV_DONTFORK
111#define QEMU_MADV_DONTFORK  MADV_DONTFORK
112#else
113#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
114#endif
115#ifdef MADV_MERGEABLE
116#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
117#else
118#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
119#endif
120#ifdef MADV_DONTDUMP
121#define QEMU_MADV_DONTDUMP MADV_DONTDUMP
122#else
123#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
124#endif
125#ifdef MADV_HUGEPAGE
126#define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE
127#else
128#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
129#endif
130
131#elif defined(CONFIG_POSIX_MADVISE)
132
133#define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
134#define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
135#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
136#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
137#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
138#define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
139
140#else /* no-op */
141
142#define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
143#define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
144#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
145#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
146#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
147#define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
148
149#endif
150
151int qemu_madvise(void *addr, size_t len, int advice);
152
153int qemu_open(const char *name, int flags, ...);
154int qemu_close(int fd);
155
156#if defined(__HAIKU__) && defined(__i386__)
157#define FMT_pid "%ld"
158#elif defined(WIN64)
159#define FMT_pid "%" PRId64
160#else
161#define FMT_pid "%d"
162#endif
163
164int qemu_create_pidfile(const char *filename);
165int qemu_get_thread_id(void);
166
167#ifndef CONFIG_IOVEC
168struct iovec {
169    void *iov_base;
170    size_t iov_len;
171};
172/*
173 * Use the same value as Linux for now.
174 */
175#define IOV_MAX 1024
176
177ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
178ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);
179#else
180#include <sys/uio.h>
181#endif
182
183#ifdef _WIN32
184static inline void qemu_timersub(const struct timeval *val1,
185                                 const struct timeval *val2,
186                                 struct timeval *res)
187{
188    res->tv_sec = val1->tv_sec - val2->tv_sec;
189    if (val1->tv_usec < val2->tv_usec) {
190        res->tv_sec--;
191        res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
192    } else {
193        res->tv_usec = val1->tv_usec - val2->tv_usec;
194    }
195}
196#else
197#define qemu_timersub timersub
198#define ffs __builtin_ffs
199#endif
200
201void qemu_set_cloexec(int fd);
202
203void qemu_set_version(const char *);
204const char *qemu_get_version(void);
205
206void fips_set_state(bool requested);
207bool fips_get_state(void);
208
209/* Return a dynamically allocated pathname denoting a file or directory that is
210 * appropriate for storing local state.
211 *
212 * @relative_pathname need not start with a directory separator; one will be
213 * added automatically.
214 *
215 * The caller is responsible for releasing the value returned with g_free()
216 * after use.
217 */
218char *qemu_get_local_state_pathname(const char *relative_pathname);
219
220/**
221 * qemu_getauxval:
222 * @type: the auxiliary vector key to lookup
223 *
224 * Search the auxiliary vector for @type, returning the value
225 * or 0 if @type is not present.
226 */
227#if defined(CONFIG_GETAUXVAL) || defined(__linux__)
228unsigned long qemu_getauxval(unsigned long type);
229#else
230static inline unsigned long qemu_getauxval(unsigned long type) { return 0; }
231#endif
232
233/**
234 * qemu_init_auxval:
235 * @envp: the third argument to main
236 *
237 * If supported and required, locate the auxiliary vector at program startup.
238 */
239#if defined(CONFIG_GETAUXVAL) || !defined(__linux__)
240static inline void qemu_init_auxval(char **envp) { }
241#else
242void qemu_init_auxval(char **envp);
243#endif
244
245#endif
246