include/qemu/osdep.h

   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 <stdint.h>
   9 #include <sys/types.h>
  10 #ifdef __OpenBSD__
  11 #include <sys/signal.h>
  12 #endif
  13
  14 #ifndef _WIN32
  15 #include <sys/wait.h>
  16 #else
  17 #define WIFEXITED(x)   1
  18 #define WEXITSTATUS(x) (x)
  19 #endif
  20
  21 #include <sys/time.h>
  22
  23 #if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
  24 /* [u]int_fast*_t not in <sys/int_types.h> */
  25 typedef unsigned char           uint_fast8_t;
  26 typedef unsigned int            uint_fast16_t;
  27 typedef signed int              int_fast16_t;
  28 #endif
  29
  30 #ifndef glue
  31 #define xglue(x, y) x ## y
  32 #define glue(x, y) xglue(x, y)
  33 #define stringify(s)    tostring(s)
  34 #define tostring(s)     #s
  35 #endif
  36
  37 #ifndef likely
  38 #if __GNUC__ < 3
  39 #define __builtin_expect(x, n) (x)
  40 #endif
  41
  42 #define likely(x)   __builtin_expect(!!(x), 1)
  43 #define unlikely(x)   __builtin_expect(!!(x), 0)
  44 #endif
  45
  46 #ifndef container_of
  47 #define container_of(ptr, type, member) ({                      \
  48         const typeof(((type *) 0)->member) *__mptr = (ptr);     \
  49         (type *) ((char *) __mptr - offsetof(type, member));})
  50 #endif
  51
  52 /* Convert from a base type to a parent type, with compile time checking.  */
  53 #ifdef __GNUC__
  54 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
  55     char __attribute__((unused)) offset_must_be_zero[ \
  56         -offsetof(type, field)]; \
  57     container_of(dev, type, field);}))
  58 #else
  59 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
  60 #endif
  61
  62 #define typeof_field(type, field) typeof(((type *)0)->field)
  63 #define type_check(t1,t2) ((t1*)0 - (t2*)0)
  64
  65 #ifndef MIN
  66 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
  67 #endif
  68 #ifndef MAX
  69 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
  70 #endif
  71
  72 /* Minimum function that returns zero only iff both values are zero.
  73  * Intended for use with unsigned values only. */
  74 #ifndef MIN_NON_ZERO
  75 #define MIN_NON_ZERO(a, b) (((a) != 0 && (a) < (b)) ? (a) : (b))
  76 #endif
  77
  78 #ifndef ROUND_UP
  79 #define ROUND_UP(n,d) (((n) + (d) - 1) & -(d))
  80 #endif
  81
  82 #ifndef DIV_ROUND_UP
  83 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
  84 #endif
  85
  86 #ifndef ARRAY_SIZE
  87 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  88 #endif
  89
  90 #ifndef always_inline
  91 #if !((__GNUC__ < 3) || defined(__APPLE__))
  92 #ifdef __OPTIMIZE__
  93 #undef inline
  94 #define inline __attribute__ (( always_inline )) __inline__
  95 #endif
  96 #endif
  97 #else
  98 #undef inline
  99 #define inline always_inline
 100 #endif
 101
 102 #define qemu_printf printf
 103
 104 int qemu_daemon(int nochdir, int noclose);
 105 void *qemu_try_memalign(size_t alignment, size_t size);
 106 void *qemu_memalign(size_t alignment, size_t size);
 107 void *qemu_anon_ram_alloc(size_t size, uint64_t *align);
 108 void qemu_vfree(void *ptr);
 109 void qemu_anon_ram_free(void *ptr, size_t size);
 110
 111 #define QEMU_MADV_INVALID -1
 112
 113 #if defined(CONFIG_MADVISE)
 114
 115 #define QEMU_MADV_WILLNEED  MADV_WILLNEED
 116 #define QEMU_MADV_DONTNEED  MADV_DONTNEED
 117 #ifdef MADV_DONTFORK
 118 #define QEMU_MADV_DONTFORK  MADV_DONTFORK
 119 #else
 120 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 121 #endif
 122 #ifdef MADV_MERGEABLE
 123 #define QEMU_MADV_MERGEABLE MADV_MERGEABLE
 124 #else
 125 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 126 #endif
 127 #ifdef MADV_UNMERGEABLE
 128 #define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE
 129 #else
 130 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
 131 #endif
 132 #ifdef MADV_DODUMP
 133 #define QEMU_MADV_DODUMP MADV_DODUMP
 134 #else
 135 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 136 #endif
 137 #ifdef MADV_DONTDUMP
 138 #define QEMU_MADV_DONTDUMP MADV_DONTDUMP
 139 #else
 140 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 141 #endif
 142 #ifdef MADV_HUGEPAGE
 143 #define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE
 144 #else
 145 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
 146 #endif
 147
 148 #elif defined(CONFIG_POSIX_MADVISE)
 149
 150 #define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
 151 #define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
 152 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 153 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 154 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
 155 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 156 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 157 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
 158
 159 #else /* no-op */
 160
 161 #define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
 162 #define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
 163 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 164 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 165 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
 166 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 167 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 168 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
 169
 170 #endif
 171
 172 int qemu_madvise(void *addr, size_t len, int advice);
 173
 174 int qemu_open(const char *name, int flags, ...);
 175 int qemu_close(int fd);
 176
 177 #if defined(__HAIKU__) && defined(__i386__)
 178 #define FMT_pid "%ld"
 179 #elif defined(WIN64)
 180 #define FMT_pid "%" PRId64
 181 #else
 182 #define FMT_pid "%d"
 183 #endif
 184
 185 int qemu_create_pidfile(const char *filename);
 186 int qemu_get_thread_id(void);
 187
 188 #ifndef CONFIG_IOVEC
 189 struct iovec {
 190     void *iov_base;
 191     size_t iov_len;
 192 };
 193 /*
 194  * Use the same value as Linux for now.
 195  */
 196 #define IOV_MAX 1024
 197
 198 ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
 199 ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);
 200 #else
 201 #include <sys/uio.h>
 202 #endif
 203
 204 #ifdef _WIN32
 205 static inline void qemu_timersub(const struct timeval *val1,
 206                                  const struct timeval *val2,
 207                                  struct timeval *res)
 208 {
 209     res->tv_sec = val1->tv_sec - val2->tv_sec;
 210     if (val1->tv_usec < val2->tv_usec) {
 211         res->tv_sec--;
 212         res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
 213     } else {
 214         res->tv_usec = val1->tv_usec - val2->tv_usec;
 215     }
 216 }
 217 #else
 218 #define qemu_timersub timersub
 219 #endif
 220
 221 void qemu_set_cloexec(int fd);
 222
 223 void qemu_set_version(const char *);
 224 const char *qemu_get_version(void);
 225
 226 void fips_set_state(bool requested);
 227 bool fips_get_state(void);
 228
 229 /* Return a dynamically allocated pathname denoting a file or directory that is
 230  * appropriate for storing local state.
 231  *
 232  * @relative_pathname need not start with a directory separator; one will be
 233  * added automatically.
 234  *
 235  * The caller is responsible for releasing the value returned with g_free()
 236  * after use.
 237  */
 238 char *qemu_get_local_state_pathname(const char *relative_pathname);
 239
 240 /* Find program directory, and save it for later usage with
 241  * qemu_get_exec_dir().
 242  * Try OS specific API first, if not working, parse from argv0. */
 243 void qemu_init_exec_dir(const char *argv0);
 244
 245 /* Get the saved exec dir.
 246  * Caller needs to release the returned string by g_free() */
 247 char *qemu_get_exec_dir(void);
 248
 249 /**
 250  * qemu_getauxval:
 251  * @type: the auxiliary vector key to lookup
 252  *
 253  * Search the auxiliary vector for @type, returning the value
 254  * or 0 if @type is not present.
 255  */
 256 unsigned long qemu_getauxval(unsigned long type);
 257
 258 void qemu_set_tty_echo(int fd, bool echo);
 259
 260 void os_mem_prealloc(int fd, char *area, size_t sz);
 261
 262 #endif