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      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 #ifndef _WIN32
     12 #include <sys/time.h>
     13 #endif
     14 
     15 #ifndef glue
     16 #define xglue(x, y) x ## y
     17 #define glue(x, y) xglue(x, y)
     18 #define stringify(s)	tostring(s)
     19 #define tostring(s)	#s
     20 #endif
     21 
     22 #ifndef likely
     23 #if __GNUC__ < 3
     24 #define __builtin_expect(x, n) (x)
     25 #endif
     26 
     27 #define likely(x)   __builtin_expect(!!(x), 1)
     28 #define unlikely(x)   __builtin_expect(!!(x), 0)
     29 #endif
     30 
     31 #ifndef offsetof
     32 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
     33 #endif
     34 #ifndef container_of
     35 #define container_of(ptr, type, member) ({                      \
     36         const typeof(((type *) 0)->member) *__mptr = (ptr);     \
     37         (type *) ((char *) __mptr - offsetof(type, member));})
     38 #endif
     39 
     40 /* Convert from a base type to a parent type, with compile time checking.  */
     41 #ifdef __GNUC__
     42 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
     43     char __attribute__((unused)) offset_must_be_zero[ \
     44         -offsetof(type, field)]; \
     45     container_of(dev, type, field);}))
     46 #else
     47 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
     48 #endif
     49 
     50 #define typeof_field(type, field) typeof(((type *)0)->field)
     51 #define type_check(t1,t2) ((t1*)0 - (t2*)0)
     52 
     53 #ifndef MIN
     54 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
     55 #endif
     56 #ifndef MAX
     57 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
     58 #endif
     59 
     60 #ifndef ARRAY_SIZE
     61 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
     62 #endif
     63 
     64 #ifndef always_inline
     65 #if !((__GNUC__ < 3) || defined(__APPLE__))
     66 #ifdef __OPTIMIZE__
     67 #define inline __attribute__ (( always_inline )) __inline__
     68 #endif
     69 #endif
     70 #else
     71 #define inline always_inline
     72 #endif
     73 
     74 #ifdef __i386__
     75 #define REGPARM __attribute((regparm(3)))
     76 #else
     77 #define REGPARM
     78 #endif
     79 
     80 #define qemu_printf printf
     81 
     82 #if defined (__GNUC__) && defined (__GNUC_MINOR__)
     83 # define QEMU_GNUC_PREREQ(maj, min) \
     84          ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
     85 #else
     86 # define QEMU_GNUC_PREREQ(maj, min) 0
     87 #endif
     88 
     89 void *qemu_memalign(size_t alignment, size_t size);
     90 void *qemu_vmalloc(size_t size);
     91 void qemu_vfree(void *ptr);
     92 
     93 int qemu_create_pidfile(const char *filename);
     94 
     95 #ifdef _WIN32
     96 int ffs(int i);
     97 
     98 typedef struct {
     99     long tv_sec;
    100     long tv_usec;
    101 } qemu_timeval;
    102 int qemu_gettimeofday(qemu_timeval *tp);
    103 #else
    104 typedef struct timeval qemu_timeval;
    105 #define qemu_gettimeofday(tp) gettimeofday(tp, NULL);
    106 #endif /* !_WIN32 */
    107 
    108 #endif
    109