The ftime() function shall set the time and millitm members
of the timeb structure pointed to by tp to contain the seconds
and milliseconds portions, respectively, of the current time in seconds since
the Epoch. The contents of the timezone and dstflag members of
tp after a call to ftime() are unspecified.
The system clock need not have millisecond granularity. Depending on any
granularity (particularly a granularity of one) renders code non-portable.
The following example shows how to get the current system time values using the
ftime() function. The timeb structure pointed to by tp is
filled with the current system time values for time and millitm.
struct timeb tp;
status = ftime(&tp);
For applications portability, the time() function should be used to
determine the current time instead of ftime(). Realtime applications
should use clock_gettime() to determine the current time instead of
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html