These functions can be used either by invoking
with a command-line argument of ‘-l time’ or by
inserting ‘@load "time"’ in your script.
This is how you load the extension.
the_time = gettimeofday()
Return the time in seconds that has elapsed since 1970-01-01 UTC as a
floating point value. If the time is unavailable on this platform, return
-1 and set
ERRNO. The returned time should have sub-second
precision, but the actual precision may vary based on the platform.
If the standard C
gettimeofday() system call is available on this
platform, then it simply returns the value. Otherwise, if on Windows,
it tries to use
result = sleep(seconds)
Attempt to sleep for seconds seconds. If seconds is negative,
or the attempt to sleep fails, return -1 and set
Otherwise, return zero after sleeping for the indicated amount of time.
Note that seconds may be a floating-point (non-integral) value.
Implementation details: depending on platform availability, this function
tries to use
select() to implement the delay.