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 91void *qemu_memalign(size_t alignment, size_t size); 92void *qemu_vmalloc(size_t size); 93void 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 128int qemu_madvise(void *addr, size_t len, int advice); 129 130int qemu_create_pidfile(const char *filename); 131int qemu_get_thread_id(void); 132 133#ifdef _WIN32 134static 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