LXR qemu/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 <stdint.h>
   9#include <sys/types.h>
  10#ifdef __OpenBSD__
  11#include <sys/signal.h>
  12#endif
  13
  14#ifndef _WIN32
  15#include <sys/wait.h>
  16#else
  17#define WIFEXITED(x)   1
  18#define WEXITSTATUS(x) (x)
  19#endif
  20
  21#include <sys/time.h>
  22
  23#if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
  24/* [u]int_fast*_t not in <sys/int_types.h> */
  25typedef unsigned char           uint_fast8_t;
  26typedef unsigned int            uint_fast16_t;
  27typedef signed int              int_fast16_t;
  28#endif
  29
  30#ifndef glue
  31#define xglue(x, y) x ## y
  32#define glue(x, y) xglue(x, y)
  33#define stringify(s)    tostring(s)
  34#define tostring(s)     #s
  35#endif
  36
  37#ifndef likely
  38#if __GNUC__ < 3
  39#define __builtin_expect(x, n) (x)
  40#endif
  41
  42#define likely(x)   __builtin_expect(!!(x), 1)
  43#define unlikely(x)   __builtin_expect(!!(x), 0)
  44#endif
  45
  46#ifndef container_of
  47#define container_of(ptr, type, member) ({                      \
  48        const typeof(((type *) 0)->member) *__mptr = (ptr);     \
  49        (type *) ((char *) __mptr - offsetof(type, member));})
  50#endif
  51
  52/* Convert from a base type to a parent type, with compile time checking.  */
  53#ifdef __GNUC__
  54#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
  55    char __attribute__((unused)) offset_must_be_zero[ \
  56        -offsetof(type, field)]; \
  57    container_of(dev, type, field);}))
  58#else
  59#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
  60#endif
  61
  62#define typeof_field(type, field) typeof(((type *)0)->field)
  63#define type_check(t1,t2) ((t1*)0 - (t2*)0)
  64
  65#ifndef MIN
  66#define MIN(a, b) (((a) < (b)) ? (a) : (b))
  67#endif
  68#ifndef MAX
  69#define MAX(a, b) (((a) > (b)) ? (a) : (b))
  70#endif
  71
  72/* Minimum function that returns zero only iff both values are zero.
  73 * Intended for use with unsigned values only. */
  74#ifndef MIN_NON_ZERO
  75#define MIN_NON_ZERO(a, b) (((a) != 0 && (a) < (b)) ? (a) : (b))
  76#endif
  77
  78#ifndef ROUND_UP
  79#define ROUND_UP(n,d) (((n) + (d) - 1) & -(d))
  80#endif
  81
  82#ifndef DIV_ROUND_UP
  83#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
  84#endif
  85
  86#ifndef ARRAY_SIZE
  87#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  88#endif
  89
  90#ifndef always_inline
  91#if !((__GNUC__ < 3) || defined(__APPLE__))
  92#ifdef __OPTIMIZE__
  93#undef inline
  94#define inline __attribute__ (( always_inline )) __inline__
  95#endif
  96#endif
  97#else
  98#undef inline
  99#define inline always_inline
 100#endif
 101
 102#define qemu_printf printf
 103
 104int qemu_daemon(int nochdir, int noclose);
 105void *qemu_try_memalign(size_t alignment, size_t size);
 106void *qemu_memalign(size_t alignment, size_t size);
 107void *qemu_anon_ram_alloc(size_t size, uint64_t *align);
 108void qemu_vfree(void *ptr);
 109void qemu_anon_ram_free(void *ptr, size_t size);
 110
 111#define QEMU_MADV_INVALID -1
 112
 113#if defined(CONFIG_MADVISE)
 114
 115#define QEMU_MADV_WILLNEED  MADV_WILLNEED
 116#define QEMU_MADV_DONTNEED  MADV_DONTNEED
 117#ifdef MADV_DONTFORK
 118#define QEMU_MADV_DONTFORK  MADV_DONTFORK
 119#else
 120#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 121#endif
 122#ifdef MADV_MERGEABLE
 123#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
 124#else
 125#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 126#endif
 127#ifdef MADV_UNMERGEABLE
 128#define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE
 129#else
 130#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
 131#endif
 132#ifdef MADV_DODUMP
 133#define QEMU_MADV_DODUMP MADV_DODUMP
 134#else
 135#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 136#endif
 137#ifdef MADV_DONTDUMP
 138#define QEMU_MADV_DONTDUMP MADV_DONTDUMP
 139#else
 140#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 141#endif
 142#ifdef MADV_HUGEPAGE
 143#define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE
 144#else
 145#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
 146#endif
 147
 148#elif defined(CONFIG_POSIX_MADVISE)
 149
 150#define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
 151#define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
 152#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 153#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 154#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
 155#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 156#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 157#define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
 158
 159#else /* no-op */
 160
 161#define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
 162#define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
 163#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
 164#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
 165#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
 166#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 167#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 168#define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
 169
 170#endif
 171
 172int qemu_madvise(void *addr, size_t len, int advice);
 173
 174int qemu_open(const char *name, int flags, ...);
 175int qemu_close(int fd);
 176
 177#if defined(__HAIKU__) && defined(__i386__)
 178#define FMT_pid "%ld"
 179#elif defined(WIN64)
 180#define FMT_pid "%" PRId64
 181#else
 182#define FMT_pid "%d"
 183#endif
 184
 185int qemu_create_pidfile(const char *filename);
 186int qemu_get_thread_id(void);
 187
 188#ifndef CONFIG_IOVEC
 189struct iovec {
 190    void *iov_base;
 191    size_t iov_len;
 192};
 193/*
 194 * Use the same value as Linux for now.
 195 */
 196#define IOV_MAX 1024
 197
 198ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
 199ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);
 200#else
 201#include <sys/uio.h>
 202#endif
 203
 204#ifdef _WIN32
 205static inline void qemu_timersub(const struct timeval *val1,
 206                                 const struct timeval *val2,
 207                                 struct timeval *res)
 208{
 209    res->tv_sec = val1->tv_sec - val2->tv_sec;
 210    if (val1->tv_usec < val2->tv_usec) {
 211        res->tv_sec--;
 212        res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
 213    } else {
 214        res->tv_usec = val1->tv_usec - val2->tv_usec;
 215    }
 216}
 217#else
 218#define qemu_timersub timersub
 219#endif
 220
 221void qemu_set_cloexec(int fd);
 222
 223void qemu_set_version(const char *);
 224const char *qemu_get_version(void);
 225
 226void fips_set_state(bool requested);
 227bool fips_get_state(void);
 228
 229/* Return a dynamically allocated pathname denoting a file or directory that is
 230 * appropriate for storing local state.
 231 *
 232 * @relative_pathname need not start with a directory separator; one will be
 233 * added automatically.
 234 *
 235 * The caller is responsible for releasing the value returned with g_free()
 236 * after use.
 237 */
 238char *qemu_get_local_state_pathname(const char *relative_pathname);
 239
 240/* Find program directory, and save it for later usage with
 241 * qemu_get_exec_dir().
 242 * Try OS specific API first, if not working, parse from argv0. */
 243void qemu_init_exec_dir(const char *argv0);
 244
 245/* Get the saved exec dir.
 246 * Caller needs to release the returned string by g_free() */
 247char *qemu_get_exec_dir(void);
 248
 249/**
 250 * qemu_getauxval:
 251 * @type: the auxiliary vector key to lookup
 252 *
 253 * Search the auxiliary vector for @type, returning the value
 254 * or 0 if @type is not present.
 255 */
 256unsigned long qemu_getauxval(unsigned long type);
 257
 258void qemu_set_tty_echo(int fd, bool echo);
 259
 260void os_mem_prealloc(int fd, char *area, size_t sz);
 261
 262int qemu_read_password(char *buf, int buf_size);
 263
 264#endif
 265