include/qemu/osdep.h

   1 #ifndef QEMU_OSDEP_H
   2 #define QEMU_OSDEP_H
   3
   4 #include <stdarg.h>
   5 #include <stddef.h>
   6 #include <stdbool.h>
   7 #ifdef __OpenBSD__
   8 #include <sys/types.h>
   9 #include <sys/signal.h>
  10 #endif
  11
  12 #ifndef _WIN32
  13 #include <sys/wait.h>
  14 #else
  15 #define WIFEXITED(x)   1
  16 #define WEXITSTATUS(x) (x)
  17 #endif
  18
  19 #include <sys/time.h>
  20
  21 #if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
  22 /* [u]int_fast*_t not in <sys/int_types.h> */
  23 typedef unsigned char           uint_fast8_t;
  24 typedef unsigned int            uint_fast16_t;
  25 typedef signed int              int_fast16_t;
  26 #endif
  27
  28 #ifndef glue
  29 #define xglue(x, y) x ## y
  30 #define glue(x, y) xglue(x, y)
  31 #define stringify(s)    tostring(s)
  32 #define tostring(s)     #s
  33 #endif
  34
  35 #ifndef likely
  36 #if __GNUC__ < 3
  37 #define __builtin_expect(x, n) (x)
  38 #endif
  39
  40 #define likely(x)   __builtin_expect(!!(x), 1)
  41 #define unlikely(x)   __builtin_expect(!!(x), 0)
  42 #endif
  43
  44 #ifndef container_of
  45 #define container_of(ptr, type, member) ({                      \
  46         const typeof(((type *) 0)->member) *__mptr = (ptr);     \
  47         (type *) ((char *) __mptr - offsetof(type, member));})
  48 #endif
  49
  50 /* Convert from a base type to a parent type, with compile time checking.  */
  51 #ifdef __GNUC__
  52 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
  53     char __attribute__((unused)) offset_must_be_zero[ \
  54         -offsetof(type, field)]; \
  55     container_of(dev, type, field);}))
  56 #else
  57 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
  58 #endif
  59
  60 #define typeof_field(type, field) typeof(((type *)0)->field)
  61 #define type_check(t1,t2) ((t1*)0 - (t2*)0)
  62
  63 #ifndef MIN
  64 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
  65 #endif
  66 #ifndef MAX
  67 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
  68 #endif
  69
  70 #ifndef DIV_ROUND_UP
  71 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
  72 #endif
  73
  74 #ifndef ARRAY_SIZE
  75 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  76 #endif
  77
  78 #ifndef always_inline
  79 #if !((__GNUC__ < 3) || defined(__APPLE__))
  80 #ifdef __OPTIMIZE__
  81 #undef inline
  82 #define inline __attribute__ (( always_inline )) __inline__
  83 #endif
  84 #endif
  85 #else
  86 #undef inline
  87 #define inline always_inline
  88 #endif
  89
  90 #define qemu_printf printf
  91
  92 int qemu_daemon(int nochdir, int noclose);
  93 void *qemu_memalign(size_t alignment, size_t size);
  94 void *qemu_vmalloc(size_t size);
  95 void qemu_vfree(void *ptr);
  96
  97 #define QEMU_MADV_INVALID -1
  98
  99 #if defined(CONFIG_MADVISE)
 100
 101 #define QEMU_MADV_WILLNEED  MADV_WILLNEED
 102 #define QEMU_MADV_DONTNEED  MADV_DONTNEED
 103 #ifdef MADV_DONTFORK
 104 #define QEMU_MADV_DONTFORK  MADV_DONTFORK
 105 #else
 106 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 107 #endif
 108 #ifdef MADV_MERGEABLE
 109 #define QEMU_MADV_MERGEABLE MADV_MERGEABLE
 110 #else
 111 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 112 #endif
 113 #ifdef MADV_DONTDUMP
 114 #define QEMU_MADV_DONTDUMP MADV_DONTDUMP
 115 #else
 116 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 117 #endif
 118 #ifdef MADV_HUGEPAGE
 119 #define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE
 120 #else
 121 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
 122 #endif
 123
 124 #elif defined(CONFIG_POSIX_MADVISE)
 125
 126 #define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
 127 #define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
 128 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 129 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 130 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 131 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
 132
 133 #else /* no-op */
 134
 135 #define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
 136 #define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
 137 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 138 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 139 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 140 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
 141
 142 #endif
 143
 144 int qemu_madvise(void *addr, size_t len, int advice);
 145
 146 int qemu_open(const char *name, int flags, ...);
 147 int qemu_close(int fd);
 148
 149 #if defined(__HAIKU__) && defined(__i386__)
 150 #define FMT_pid "%ld"
 151 #elif defined(WIN64)
 152 #define FMT_pid "%" PRId64
 153 #else
 154 #define FMT_pid "%d"
 155 #endif
 156
 157 int qemu_create_pidfile(const char *filename);
 158 int qemu_get_thread_id(void);
 159
 160 #ifdef _WIN32
 161 static inline void qemu_timersub(const struct timeval *val1,
 162                                  const struct timeval *val2,
 163                                  struct timeval *res)
 164 {
 165     res->tv_sec = val1->tv_sec - val2->tv_sec;
 166     if (val1->tv_usec < val2->tv_usec) {
 167         res->tv_sec--;
 168         res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
 169     } else {
 170         res->tv_usec = val1->tv_usec - val2->tv_usec;
 171     }
 172 }
 173 #else
 174 #define qemu_timersub timersub
 175 #endif
 176
 177 void qemu_set_cloexec(int fd);
 178
 179 void qemu_set_version(const char *);
 180 const char *qemu_get_version(void);
 181
 182 void fips_set_state(bool requested);
 183 bool fips_get_state(void);
 184
 185 #endif