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