File:  [Qemu by Fabrice Bellard] / qemu / osdep.h
Revision 1.1.1.9 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 19:17:22 2018 UTC (3 years, 1 month ago) by root
Branches: qemu, MAIN
CVS tags: qemu1001, HEAD
qemu 1.0.1

    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: #ifndef glue
   14: #define xglue(x, y) x ## y
   15: #define glue(x, y) xglue(x, y)
   16: #define stringify(s)	tostring(s)
   17: #define tostring(s)	#s
   18: #endif
   19: 
   20: #ifndef likely
   21: #if __GNUC__ < 3
   22: #define __builtin_expect(x, n) (x)
   23: #endif
   24: 
   25: #define likely(x)   __builtin_expect(!!(x), 1)
   26: #define unlikely(x)   __builtin_expect(!!(x), 0)
   27: #endif
   28: 
   29: #ifdef CONFIG_NEED_OFFSETOF
   30: #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
   31: #endif
   32: #ifndef container_of
   33: #define container_of(ptr, type, member) ({                      \
   34:         const typeof(((type *) 0)->member) *__mptr = (ptr);     \
   35:         (type *) ((char *) __mptr - offsetof(type, member));})
   36: #endif
   37: 
   38: /* Convert from a base type to a parent type, with compile time checking.  */
   39: #ifdef __GNUC__
   40: #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
   41:     char __attribute__((unused)) offset_must_be_zero[ \
   42:         -offsetof(type, field)]; \
   43:     container_of(dev, type, field);}))
   44: #else
   45: #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
   46: #endif
   47: 
   48: #define typeof_field(type, field) typeof(((type *)0)->field)
   49: #define type_check(t1,t2) ((t1*)0 - (t2*)0)
   50: 
   51: #ifndef MIN
   52: #define MIN(a, b) (((a) < (b)) ? (a) : (b))
   53: #endif
   54: #ifndef MAX
   55: #define MAX(a, b) (((a) > (b)) ? (a) : (b))
   56: #endif
   57: 
   58: #ifndef DIV_ROUND_UP
   59: #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
   60: #endif
   61: 
   62: #ifndef ARRAY_SIZE
   63: #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
   64: #endif
   65: 
   66: #ifndef always_inline
   67: #if !((__GNUC__ < 3) || defined(__APPLE__))
   68: #ifdef __OPTIMIZE__
   69: #define inline __attribute__ (( always_inline )) __inline__
   70: #endif
   71: #endif
   72: #else
   73: #define inline always_inline
   74: #endif
   75: 
   76: #ifdef __i386__
   77: #define REGPARM __attribute((regparm(3)))
   78: #else
   79: #define REGPARM
   80: #endif
   81: 
   82: #define qemu_printf printf
   83: 
   84: int qemu_daemon(int nochdir, int noclose);
   85: void *qemu_memalign(size_t alignment, size_t size);
   86: void *qemu_vmalloc(size_t size);
   87: void qemu_vfree(void *ptr);
   88: 
   89: #define QEMU_MADV_INVALID -1
   90: 
   91: #if defined(CONFIG_MADVISE)
   92: 
   93: #define QEMU_MADV_WILLNEED  MADV_WILLNEED
   94: #define QEMU_MADV_DONTNEED  MADV_DONTNEED
   95: #ifdef MADV_DONTFORK
   96: #define QEMU_MADV_DONTFORK  MADV_DONTFORK
   97: #else
   98: #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
   99: #endif
  100: #ifdef MADV_MERGEABLE
  101: #define QEMU_MADV_MERGEABLE MADV_MERGEABLE
  102: #else
  103: #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
  104: #endif
  105: 
  106: #elif defined(CONFIG_POSIX_MADVISE)
  107: 
  108: #define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
  109: #define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
  110: #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
  111: #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
  112: 
  113: #else /* no-op */
  114: 
  115: #define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
  116: #define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
  117: #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
  118: #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
  119: 
  120: #endif
  121: 
  122: int qemu_madvise(void *addr, size_t len, int advice);
  123: 
  124: #if defined(__HAIKU__) && defined(__i386__)
  125: #define FMT_pid "%ld"
  126: #elif defined(WIN64)
  127: #define FMT_pid "%" PRId64
  128: #else
  129: #define FMT_pid "%d"
  130: #endif
  131: 
  132: int qemu_create_pidfile(const char *filename);
  133: int qemu_get_thread_id(void);
  134: 
  135: #ifdef _WIN32
  136: static inline void qemu_timersub(const struct timeval *val1,
  137:                                  const struct timeval *val2,
  138:                                  struct timeval *res)
  139: {
  140:     res->tv_sec = val1->tv_sec - val2->tv_sec;
  141:     if (val1->tv_usec < val2->tv_usec) {
  142:         res->tv_sec--;
  143:         res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
  144:     } else {
  145:         res->tv_usec = val1->tv_usec - val2->tv_usec;
  146:     }
  147: }
  148: #else
  149: #define qemu_timersub timersub
  150: #endif
  151: 
  152: #endif

unix.superglobalmegacorp.com