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 #if defined (__GNUC__) && defined (__GNUC_MINOR__) 85 # define QEMU_GNUC_PREREQ(maj, min) \ 86 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) 87 #else 88 # define QEMU_GNUC_PREREQ(maj, min) 0 89 #endif 90 91 void *qemu_memalign(size_t alignment, size_t size); 92 void *qemu_vmalloc(size_t size); 93 void qemu_vfree(void *ptr); 94 95 #define QEMU_MADV_INVALID -1 96 97 #if defined(CONFIG_MADVISE) 98 99 #define QEMU_MADV_WILLNEED MADV_WILLNEED 100 #define QEMU_MADV_DONTNEED MADV_DONTNEED 101 #ifdef MADV_DONTFORK 102 #define QEMU_MADV_DONTFORK MADV_DONTFORK 103 #else 104 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID 105 #endif 106 #ifdef MADV_MERGEABLE 107 #define QEMU_MADV_MERGEABLE MADV_MERGEABLE 108 #else 109 #define QEMU_MADV_MERGEABLE 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 118 119 #else /* no-op */ 120 121 #define QEMU_MADV_WILLNEED QEMU_MADV_INVALID 122 #define QEMU_MADV_DONTNEED QEMU_MADV_INVALID 123 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID 124 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID 125 126 #endif 127 128 int qemu_madvise(void *addr, size_t len, int advice); 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 #define ffs __builtin_ffs 149 #endif 150 151 #endif 152
