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> */ 24 typedef unsigned char uint_fast8_t; 25 typedef unsigned int uint_fast16_t; 26 typedef 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 97 int qemu_daemon(int nochdir, int noclose); 98 void *qemu_memalign(size_t alignment, size_t size); 99 void *qemu_vmalloc(size_t size); 100 void *qemu_anon_ram_alloc(size_t size); 101 void qemu_vfree(void *ptr); 102 void 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 150 151 int qemu_madvise(void *addr, size_t len, int advice); 152 153 int qemu_open(const char *name, int flags, ...); 154 int 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 163 164 int qemu_create_pidfile(const char *filename); 165 int qemu_get_thread_id(void); 166 167 #ifndef CONFIG_IOVEC 168 struct 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 176 177 ssize_t readv(int fd, const struct iovec *iov, int iov_cnt); 178 ssize_t writev(int fd, const struct iovec *iov, int iov_cnt); 179 #else 180 #include <sys/uio.h> 181 #endif 182 183 #ifdef _WIN32 184 static 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 200 201 void qemu_set_cloexec(int fd); 202 203 void qemu_set_version(const char *); 204 const char *qemu_get_version(void); 205 206 void fips_set_state(bool requested); 207 bool 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 */ 218 char *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__) 228 unsigned long qemu_getauxval(unsigned long type); 229 #else 230 static 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__) 240 static inline void qemu_init_auxval(char **envp) { } 241 #else 242 void qemu_init_auxval(char **envp); 243 #endif 244 245 #endif 246
