..Again, in pseudocode, this would work: 
sub threadwork(){
    lock(MUTEX);
    do{ 
         the work;
    }
}

$t = new threadpool(42 threads);
$t->do( &threadwork() );

lock(MUTEX);
loop{
    ct = timestamp();
    sleep(0.9 seconds); # do a blocking select with timeout in perl fo
+r microsecond timings
    loop {nop;} while (ct==timestamp()); # the spinloop 
         #or, for a interval of 5 seconds: while ( ct+5>timestamp() );
    unlock(MUTEX);
}

[download]

Hope that helps

In reply to Re^5: The most precise second (timer) by misc
in thread The most precise second (timer) by tukusejssirs

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