C++ TIMESPEC_TO_TIMEVAL函数代码示例

int
set_utimes(const char *file, struct stat *fs)
{
    static struct timeval tv[2];

#ifndef BSD
    tv[0].tv_sec = fs->st_atime;
    tv[0].tv_usec = 0;
    tv[1].tv_sec = fs->st_mtime;
    tv[1].tv_usec = 0;

    if (utimes(file, tv)) {
        warn("utimes: %s", file);
        return 1;
    }
#else
    TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
    TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);

    if (lutimes(file, tv)) {
    warn("lutimes: %s", file);
    return (1);
    }
#endif
    return (0);
}

static void
setfile(const char *name, struct stat *fs)
{
	static struct timeval tv[2];

	fs->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;

	TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atim);
	TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtim);
	if (utimes(name, tv))
		cwarn("utimes: %s", name);

	/*
	 * Changing the ownership probably won't succeed, unless we're root
	 * or POSIX_CHOWN_RESTRICTED is not set.  Set uid/gid before setting
	 * the mode; current BSD behavior is to remove all setuid bits on
	 * chown.  If chown fails, lose setuid/setgid bits.
	 */
	if (chown(name, fs->st_uid, fs->st_gid)) {
		if (errno != EPERM)
			cwarn("chown: %s", name);
		fs->st_mode &= ~(S_ISUID|S_ISGID);
	}
	if (chmod(name, fs->st_mode) && errno != EOPNOTSUPP)
		cwarn("chmod: %s", name);

	if (chflags(name, fs->st_flags) && errno != EOPNOTSUPP)
		cwarn("chflags: %s", name);
}

/*
 * set attributes to what is specified.  XXX: no rollback in case of failure
 */
static int
processvattr(const char *path, const struct vattr *va, int regular)
{
	struct timeval tv[2];

	/* XXX: -1 == PUFFS_VNOVAL, but shouldn't trust that */
	if (va->va_uid != (unsigned)-1 || va->va_gid != (unsigned)-1)
		if (lchown(path, va->va_uid, va->va_gid) == -1)
			return errno;

	if (va->va_mode != (u_short)PUFFS_VNOVAL)
		if (lchmod(path, va->va_mode) == -1)
			return errno;

	/* sloppy */
	if (va->va_atime.tv_sec != (time_t)PUFFS_VNOVAL
	    || va->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) {
		TIMESPEC_TO_TIMEVAL(&tv[0], &va->va_atime);
		TIMESPEC_TO_TIMEVAL(&tv[1], &va->va_mtime);

		if (lutimes(path, tv) == -1)
			return errno;
	}

	if (regular && va->va_size != (u_quad_t)PUFFS_VNOVAL)
		if (truncate(path, (off_t)va->va_size) == -1)
			return errno;

	return 0;
}

int usbi_cond_timedwait(usbi_cond_t *cond,
						usbi_mutex_t *mutex,
						const struct timespec *abstime) {
	FILETIME filetime;
	ULARGE_INTEGER rtime;
	struct timeval targ_time, cur_time, delta_time;
	struct timespec cur_time_ns;
	DWORD millis;

	// GetSystemTimeAsFileTime() is not available on CE
	SYSTEMTIME st;
	GetSystemTime(&st);
	SystemTimeToFileTime(&st, &filetime);
	rtime.LowPart   = filetime.dwLowDateTime;
	rtime.HighPart  = filetime.dwHighDateTime;
	rtime.QuadPart -= epoch_time;
	cur_time_ns.tv_sec = (long)(rtime.QuadPart / 10000000);
	cur_time_ns.tv_nsec = (long)((rtime.QuadPart % 10000000)*100);
	TIMESPEC_TO_TIMEVAL(&cur_time, &cur_time_ns);

	TIMESPEC_TO_TIMEVAL(&targ_time, abstime);
	timersub(&targ_time, &cur_time, &delta_time);
	if(delta_time.tv_sec < 0) // abstime already passed?
		millis = 0;
	else {
		millis  = delta_time.tv_usec/1000;
		millis += delta_time.tv_sec *1000;
		if (delta_time.tv_usec % 1000) // round up to next millisecond
			millis++;
	}

	return usbi_cond_intwait(cond, mutex, millis);
}

int usbi_cond_timedwait(usbi_cond_t *cond,
						usbi_mutex_t *mutex,
						const struct timespec *abstime) {
	FILETIME filetime;
	ULARGE_INTEGER rtime;
	struct timeval targ_time, cur_time, delta_time;
	struct timespec cur_time_ns;
	DWORD millis;
	extern const uint64_t epoch_time;

	GetSystemTimeAsFileTime(&filetime);
	rtime.LowPart   = filetime.dwLowDateTime;
	rtime.HighPart  = filetime.dwHighDateTime;
	rtime.QuadPart -= epoch_time;
	cur_time_ns.tv_sec = (long)(rtime.QuadPart / 10000000);
	cur_time_ns.tv_nsec = (long)((rtime.QuadPart % 10000000)*100);
	TIMESPEC_TO_TIMEVAL(&cur_time, &cur_time_ns);

	TIMESPEC_TO_TIMEVAL(&targ_time, abstime);
	timersub(&targ_time, &cur_time, &delta_time);
	if(delta_time.tv_sec < 0) 
		millis = 0;
	else {
		millis  = delta_time.tv_usec/1000;
		millis += delta_time.tv_sec *1000;
		if (delta_time.tv_usec % 1000) 
			millis++;
	}

	return usbi_cond_intwait(cond, mutex, millis);
}

void
stime_file(char *fname, struct timeval *tvp)
{
	struct stat sb;

	if (stat(fname, &sb))
		err(1, "%s", fname);
	TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec);
	TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec);
}

int
set_utimes(const char *file, struct stat *fs)
{
    static struct timeval tv[2];

    TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
    TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);

    if (lutimes(file, tv)) {
	warn("lutimes: %s", file);
	return (1);
    }
    return (0);
}

static long
watchdog_check_dogfunction_time(struct timespec *tp_start,
    struct timespec *tp_end)
{
	struct timeval tv_start, tv_end, tv_now, tv;
	const char *cmd_prefix, *cmd;
	struct timespec tp_now;
	int sec;

	if (!do_timedog)
		return (0);

	TIMESPEC_TO_TIMEVAL(&tv_start, tp_start);
	TIMESPEC_TO_TIMEVAL(&tv_end, tp_end);
	timersub(&tv_end, &tv_start, &tv);
	sec = tv.tv_sec;
	if (sec < carp_thresh_seconds)
		return (sec);

	if (test_cmd) {
		cmd_prefix = "Watchdog program";
		cmd = test_cmd;
	} else {
		cmd_prefix = "Watchdog operation";
		cmd = "stat(\"/etc\", &sb)";
	}
	if (do_syslog)
		syslog(LOG_CRIT, "%s: '%s' took too long: "
		    "%d.%06ld seconds >= %d seconds threshold",
		    cmd_prefix, cmd, sec, (long)tv.tv_usec,
		    carp_thresh_seconds);
	else
		warnx("%s: '%s' took too long: "
		    "%d.%06ld seconds >= %d seconds threshold",
		    cmd_prefix, cmd, sec, (long)tv.tv_usec,
		    carp_thresh_seconds);

	/*
	 * Adjust the sleep interval again in case syslog(3) took a non-trivial
	 * amount of time to run.
	 */
	if (watchdog_getuptime(&tp_now))
		return (sec);
	TIMESPEC_TO_TIMEVAL(&tv_now, &tp_now);
	timersub(&tv_now, &tv_start, &tv);
	sec = tv.tv_sec;

	return (sec);
}

int
setfile(struct stat *fs, int fd)
{
	static struct timeval tv[2];
	int rval;

	rval = 0;
	fs->st_mode &= S_ISTXT | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;

	TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
	TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);
	if (utimes(to.p_path, tv)) {
		warn("utimes: %s", to.p_path);
		rval = 1;
	}
	/*
	 * Changing the ownership probably won't succeed, unless we're root
	 * or POSIX_CHOWN_RESTRICTED is not set.  Set uid/gid before setting
	 * the mode; current BSD behavior is to remove all setuid bits on
	 * chown.  If chown fails, lose setuid/setgid bits.
	 */
	if (fd ? fchown(fd, fs->st_uid, fs->st_gid) :
	    chown(to.p_path, fs->st_uid, fs->st_gid)) {
		if (errno != EPERM) {
			warn("chown: %s", to.p_path);
			rval = 1;
		}
		fs->st_mode &= ~(S_ISTXT | S_ISUID | S_ISGID);
	}
	if (fd ? fchmod(fd, fs->st_mode) : chmod(to.p_path, fs->st_mode)) {
		warn("chmod: %s", to.p_path);
		rval = 1;
	}

	/*
	 * XXX
	 * NFS doesn't support chflags; ignore errors unless there's reason
	 * to believe we're losing bits.  (Note, this still won't be right
	 * if the server supports flags and we were trying to *remove* flags
	 * on a file that we copied, i.e., that we didn't create.)
	 */
	errno = 0;
	if (fd ? fchflags(fd, fs->st_flags) : chflags(to.p_path, fs->st_flags))
		if (errno != EOPNOTSUPP || fs->st_flags != 0) {
			warn("chflags: %s", to.p_path);
			rval = 1;
		}
	return (rval);
}

void
set_ftime(char *fnm, time_t mtime, time_t atime, int frc, int slk)
{
	struct timeval tv[2];
	struct stat sb;

	tv[0].tv_sec = atime;
	tv[0].tv_usec = 0;
	tv[1].tv_sec = mtime;
	tv[1].tv_usec = 0;
	if (!frc && (!patime || !pmtime)) {
		/*
		 * if we are not forcing, only set those times the user wants
		 * set. We get the current values of the times if we need them.
		 */
		if (lstat(fnm, &sb) == 0) {
#if BSD4_4 && !HAVE_NBTOOL_CONFIG_H
			if (!patime)
				TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec);
			if (!pmtime)
				TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
#else
			if (!patime)
				tv[0].tv_sec = sb.st_atime;
			if (!pmtime)
				tv[1].tv_sec = sb.st_mtime;
#endif
		} else
			syswarn(0, errno, "Cannot obtain file stats %s", fnm);
	}

	/*
	 * set the times
	 */
#if HAVE_LUTIMES
	if (lutimes(fnm, tv) == 0)
		return;
	if (errno != ENOSYS)	/* XXX linux: lutimes is per-FS */
		goto bad;
#endif
	if (slk)
		return;
	if (utimes(fnm, tv) == -1)
		goto bad;
	return;
bad:
	syswarn(1, errno, "Access/modification time set failed on: %s", fnm);
}

int get_boot_time(struct timeval *boot_time)
{
#ifdef CLOCK_BOOTTIME
	struct timespec hires_uptime;
	struct timeval lores_uptime;
#endif
	struct timeval now;
	struct sysinfo info;

	if (gettimeofday(&now, NULL) != 0) {
		warn(_("gettimeofday failed"));
		return -errno;
	}
#ifdef CLOCK_BOOTTIME
	if (clock_gettime(CLOCK_BOOTTIME, &hires_uptime) == 0) {
		TIMESPEC_TO_TIMEVAL(&lores_uptime, &hires_uptime);
		timersub(&now, &lores_uptime, boot_time);
		return 0;
	}
#endif
	/* fallback */
	if (sysinfo(&info) != 0)
		warn(_("sysinfo failed"));

	boot_time->tv_sec = now.tv_sec - info.uptime;
	boot_time->tv_usec = 0;
	return 0;
}

void 
ioport_sleep(const struct timespec UNUSED(nap))
{
#ifdef HAVE_IOPERM
    uint32_t usec;
    struct timeval nap_for;
    time_t i;

    TIMESPEC_TO_TIMEVAL(&nap_for, &nap);

    /* 
     * process the seconds, we do this in a loop so we don't have to 
     * use slower 64bit integers or worry about integer overflows.
     */
    for (i = 0; i < nap_for.tv_sec; i ++) {
        usec = SEC_TO_MICROSEC(nap_for.tv_sec);
        while (usec > 0) {
            usec --;
            outb(ioport_sleep_value, 0x80);
        }
    }

    /* process the usec */
    usec = nap.tv_nsec / 1000;
    usec --; /* fudge factor for all the above */
    while (usec > 0) {
        usec --;
        outb(ioport_sleep_value, 0x80);
    }
#else
    err(-1, "Platform does not support IO Port for timing");
#endif
}

int
__select(int nfds, fd_set *readfds,
         fd_set *writefds, fd_set *exceptfds,
         struct timeval *timeout)
{
  int result;
  struct timespec ts, *tsp = NULL;

  if (timeout)
    {
      TIMEVAL_TO_TIMESPEC (timeout, &ts);
      tsp = &ts;
    }

  result = SYSCALL_CANCEL (pselect6, nfds, readfds, writefds, exceptfds, tsp,
			   NULL);

  if (timeout)
    {
      /* Linux by default will update the timeout after a pselect6 syscall
         (though the pselect() glibc call suppresses this behavior).
         Since select() on Linux has the same behavior as the pselect6
         syscall, we update the timeout here.  */
      TIMESPEC_TO_TIMEVAL (timeout, &ts);
    }

  return result;
}

int nanosleep(const struct timespec *req, struct timespec *rem)
{
	int rc, saverrno;
	extern int errno;
	struct timeval tstart, tstop, tremain, time2wait;

	TIMESPEC_TO_TIMEVAL(&time2wait, req)
	(void) gettimeofday(&tstart, NULL);
	rc = select(0, NULL, NULL, NULL, &time2wait);
	if (rc == -1) {
		saverrno = errno;
		(void) gettimeofday (&tstop, NULL);
		errno = saverrno;
		tremain.tv_sec = time2wait.tv_sec - 
			(tstop.tv_sec - tstart.tv_sec);
		tremain.tv_usec = time2wait.tv_usec - 
			(tstop.tv_usec - tstart.tv_usec);
		tremain.tv_sec += tremain.tv_usec / 1000000L;
		tremain.tv_usec %= 1000000L;
	} else {
		tremain.tv_sec = 0;
		tremain.tv_usec = 0;
	}
	TIMEVAL_TO_TIMESPEC(&tremain, rem)

	return(rc);
}

/* Check the first NFDS descriptors each in READFDS (if not NULL) for read
   readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS
   (if not NULL) for exceptional conditions.  If TIMEOUT is not NULL, time out
   after waiting the interval specified therein.  Additionally set the sigmask
   SIGMASK for this call.  Returns the number of ready descriptors, or -1 for
   errors.  */
int
pselect (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
	   const struct timespec *timeout, const sigset_t *sigmask)
{
  struct timeval tval;
  int retval;
  sigset_t savemask;

  /* Change nanosecond number to microseconds.  This might mean losing
     precision and therefore the `pselect` should be available.  But
     for now it is hardly found.  */
  if (timeout != NULL)
    TIMESPEC_TO_TIMEVAL (&tval, timeout);

  /* The setting and restoring of the signal mask and the select call
     should be an atomic operation.  This can't be done without kernel
     help.  */
  if (sigmask != NULL)
    sigprocmask (SIG_SETMASK, sigmask, &savemask);

  /* Note the pselect() is a cancellation point.  But since we call
     select() which itself is a cancellation point we do not have
     to do anything here.  */
  retval = select (nfds, readfds, writefds, exceptfds,
		     timeout != NULL ? &tval : NULL);

  if (sigmask != NULL)
    sigprocmask (SIG_SETMASK, &savemask, NULL);

  return retval;
}