osdep.h

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