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UV_EXTERN uv_os_fd_t uv_get_osfhandle(int fd);
UV_EXTERN int uv_open_osfhandle(uv_os_fd_t os_fd);

typedef struct {
  long tv_sec;
  long tv_usec;
} uv_timeval_t;

typedef struct {
  int64_t tv_sec;
  int32_t tv_usec;
} uv_timeval64_t;

typedef struct {
   uv_timeval_t ru_utime; /* user CPU time used */
   uv_timeval_t ru_stime; /* system CPU time used */
   uint64_t ru_maxrss;    /* maximum resident set size */
   uint64_t ru_ixrss;     /* integral shared memory size */
   uint64_t ru_idrss;     /* integral unshared data size */
   uint64_t ru_isrss;     /* integral unshared stack size */
   uint64_t ru_minflt;    /* page reclaims (soft page faults) */
   uint64_t ru_majflt;    /* page faults (hard page faults) */
   uint64_t ru_nswap;     /* swaps */
   uint64_t ru_inblock;   /* block input operations */
   uint64_t ru_oublock;   /* block output operations */
   uint64_t ru_msgsnd;    /* IPC messages sent */
   uint64_t ru_msgrcv;    /* IPC messages received */
   uint64_t ru_nsignals;  /* signals received */
   uint64_t ru_nvcsw;     /* voluntary context switches */
   uint64_t ru_nivcsw;    /* involuntary context switches */
} uv_rusage_t;

UV_EXTERN int uv_getrusage(uv_rusage_t* rusage);

UV_EXTERN int uv_os_homedir(char* buffer, size_t* size);
UV_EXTERN int uv_os_tmpdir(char* buffer, size_t* size);
UV_EXTERN int uv_os_get_passwd(uv_passwd_t* pwd);
UV_EXTERN void uv_os_free_passwd(uv_passwd_t* pwd);
UV_EXTERN uv_pid_t uv_os_getpid(void);
UV_EXTERN uv_pid_t uv_os_getppid(void);

#define UV_PRIORITY_LOW 19
#define UV_PRIORITY_BELOW_NORMAL 10
#define UV_PRIORITY_NORMAL 0
#define UV_PRIORITY_ABOVE_NORMAL -7
#define UV_PRIORITY_HIGH -14
#define UV_PRIORITY_HIGHEST -20

UV_EXTERN int uv_os_getpriority(uv_pid_t pid, int* priority);
UV_EXTERN int uv_os_setpriority(uv_pid_t pid, int priority);

UV_EXTERN int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count);
UV_EXTERN void uv_free_cpu_info(uv_cpu_info_t* cpu_infos, int count);

UV_EXTERN int uv_interface_addresses(uv_interface_address_t** addresses,
                                     int* count);
UV_EXTERN void uv_free_interface_addresses(uv_interface_address_t* addresses,
                                           int count);

UV_EXTERN int uv_os_getenv(const char* name, char* buffer, size_t* size);
UV_EXTERN int uv_os_setenv(const char* name, const char* value);
UV_EXTERN int uv_os_unsetenv(const char* name);

#ifdef MAXHOSTNAMELEN
# define UV_MAXHOSTNAMESIZE (MAXHOSTNAMELEN + 1)
#else
  /*
    Fallback for the maximum hostname size, including the null terminator. The
    Windows gethostname() documentation states that 256 bytes will always be
    large enough to hold the null-terminated hostname.
  */
# define UV_MAXHOSTNAMESIZE 256
#endif

UV_EXTERN int uv_os_gethostname(char* buffer, size_t* size);

UV_EXTERN int uv_os_uname(uv_utsname_t* buffer);


typedef enum {
  UV_FS_UNKNOWN = -1,
  UV_FS_CUSTOM,
  UV_FS_OPEN,
  UV_FS_CLOSE,
  UV_FS_READ,
  UV_FS_WRITE,
  UV_FS_SENDFILE,
  UV_FS_STAT,
  UV_FS_LSTAT,
  UV_FS_FSTAT,
  UV_FS_FTRUNCATE,
  UV_FS_UTIME,
  UV_FS_FUTIME,
  UV_FS_ACCESS,
  UV_FS_CHMOD,
  UV_FS_FCHMOD,
  UV_FS_FSYNC,
  UV_FS_FDATASYNC,
  UV_FS_UNLINK,
  UV_FS_RMDIR,
  UV_FS_MKDIR,
  UV_FS_MKDTEMP,
  UV_FS_RENAME,
  UV_FS_SCANDIR,
  UV_FS_LINK,
  UV_FS_SYMLINK,
  UV_FS_READLINK,
  UV_FS_CHOWN,
  UV_FS_FCHOWN,
  UV_FS_REALPATH,
  UV_FS_COPYFILE,
  UV_FS_LCHOWN,
  UV_FS_OPENDIR,
  UV_FS_READDIR,
  UV_FS_CLOSEDIR
} uv_fs_type;

struct uv_dir_s {
  uv_dirent_t* dirents;
  size_t nentries;
  void* reserved[4];
  UV_DIR_PRIVATE_FIELDS