include/qemu/osdep.h

   1 #ifndef QEMU_OSDEP_H
   2 #define QEMU_OSDEP_H
   3
   4 #include "config-host.h"
   5 #include <stdarg.h>
   6 #include <stddef.h>
   7 #include <stdbool.h>
   8 #include <sys/types.h>
   9 #ifdef __OpenBSD__
  10 #include <sys/signal.h>
  11 #endif
  12
  13 #ifndef _WIN32
  14 #include <sys/wait.h>
  15 #else
  16 #define WIFEXITED(x)   1
  17 #define WEXITSTATUS(x) (x)
  18 #endif
  19
  20 #include <sys/time.h>
  21
  22 #if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
  23 /* [u]int_fast*_t not in <sys/int_types.h> */
  24 typedef unsigned char           uint_fast8_t;
  25 typedef unsigned int            uint_fast16_t;
  26 typedef signed int              int_fast16_t;
  27 #endif
  28
  29 #ifndef glue
  30 #define xglue(x, y) x ## y
  31 #define glue(x, y) xglue(x, y)
  32 #define stringify(s)    tostring(s)
  33 #define tostring(s)     #s
  34 #endif
  35
  36 #ifndef likely
  37 #if __GNUC__ < 3
  38 #define __builtin_expect(x, n) (x)
  39 #endif
  40
  41 #define likely(x)   __builtin_expect(!!(x), 1)
  42 #define unlikely(x)   __builtin_expect(!!(x), 0)
  43 #endif
  44
  45 #ifndef container_of
  46 #define container_of(ptr, type, member) ({                      \
  47         const typeof(((type *) 0)->member) *__mptr = (ptr);     \
  48         (type *) ((char *) __mptr - offsetof(type, member));})
  49 #endif
  50
  51 /* Convert from a base type to a parent type, with compile time checking.  */
  52 #ifdef __GNUC__
  53 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
  54     char __attribute__((unused)) offset_must_be_zero[ \
  55         -offsetof(type, field)]; \
  56     container_of(dev, type, field);}))
  57 #else
  58 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
  59 #endif
  60
  61 #define typeof_field(type, field) typeof(((type *)0)->field)
  62 #define type_check(t1,t2) ((t1*)0 - (t2*)0)
  63
  64 #ifndef MIN
  65 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
  66 #endif
  67 #ifndef MAX
  68 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
  69 #endif
  70
  71 #ifndef ROUND_UP
  72 #define ROUND_UP(n,d) (((n) + (d) - 1) & -(d))
  73 #endif
  74
  75 #ifndef DIV_ROUND_UP
  76 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
  77 #endif
  78
  79 #ifndef ARRAY_SIZE
  80 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  81 #endif
  82
  83 #ifndef always_inline
  84 #if !((__GNUC__ < 3) || defined(__APPLE__))
  85 #ifdef __OPTIMIZE__
  86 #undef inline
  87 #define inline __attribute__ (( always_inline )) __inline__
  88 #endif
  89 #endif
  90 #else
  91 #undef inline
  92 #define inline always_inline
  93 #endif
  94
  95 #define qemu_printf printf
  96
  97 int qemu_daemon(int nochdir, int noclose);
  98 void *qemu_memalign(size_t alignment, size_t size);
  99 void *qemu_vmalloc(size_t size);
 100 void qemu_vfree(void *ptr);
 101
 102 #define QEMU_MADV_INVALID -1
 103
 104 #if defined(CONFIG_MADVISE)
 105
 106 #define QEMU_MADV_WILLNEED  MADV_WILLNEED
 107 #define QEMU_MADV_DONTNEED  MADV_DONTNEED
 108 #ifdef MADV_DONTFORK
 109 #define QEMU_MADV_DONTFORK  MADV_DONTFORK
 110 #else
 111 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 112 #endif
 113 #ifdef MADV_MERGEABLE
 114 #define QEMU_MADV_MERGEABLE MADV_MERGEABLE
 115 #else
 116 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 117 #endif
 118 #ifdef MADV_DONTDUMP
 119 #define QEMU_MADV_DONTDUMP MADV_DONTDUMP
 120 #else
 121 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 122 #endif
 123 #ifdef MADV_HUGEPAGE
 124 #define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE
 125 #else
 126 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
 127 #endif
 128
 129 #elif defined(CONFIG_POSIX_MADVISE)
 130
 131 #define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
 132 #define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
 133 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 134 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 135 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 136 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
 137
 138 #else /* no-op */
 139
 140 #define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
 141 #define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
 142 #define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 143 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 144 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 145 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
 146
 147 #endif
 148
 149 int qemu_madvise(void *addr, size_t len, int advice);
 150
 151 int qemu_open(const char *name, int flags, ...);
 152 int qemu_close(int fd);
 153
 154 #if defined(__HAIKU__) && defined(__i386__)
 155 #define FMT_pid "%ld"
 156 #elif defined(WIN64)
 157 #define FMT_pid "%" PRId64
 158 #else
 159 #define FMT_pid "%d"
 160 #endif
 161
 162 int qemu_create_pidfile(const char *filename);
 163 int qemu_get_thread_id(void);
 164
 165 #ifndef CONFIG_IOVEC
 166 struct iovec {
 167     void *iov_base;
 168     size_t iov_len;
 169 };
 170 /*
 171  * Use the same value as Linux for now.
 172  */
 173 #define IOV_MAX 1024
 174
 175 ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
 176 ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);
 177 #else
 178 #include <sys/uio.h>
 179 #endif
 180
 181 #ifdef _WIN32
 182 static inline void qemu_timersub(const struct timeval *val1,
 183                                  const struct timeval *val2,
 184                                  struct timeval *res)
 185 {
 186     res->tv_sec = val1->tv_sec - val2->tv_sec;
 187     if (val1->tv_usec < val2->tv_usec) {
 188         res->tv_sec--;
 189         res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
 190     } else {
 191         res->tv_usec = val1->tv_usec - val2->tv_usec;
 192     }
 193 }
 194 #else
 195 #define qemu_timersub timersub
 196 #endif
 197
 198 void qemu_set_cloexec(int fd);
 199
 200 void qemu_set_version(const char *);
 201 const char *qemu_get_version(void);
 202
 203 void fips_set_state(bool requested);
 204 bool fips_get_state(void);
 205
 206 #endif