> Always check return codes. gettimeofday() *can* fail (most likely, > tv1 and/or tv2 are bum pointers that don't point where you think). As a matter of fact, no, it can not, at least as long as its second argument is NULL: # RETURN VALUE # # The gettimeofday() function shall return 0 and no value shall be # reserved to indicate an error. (Single Unix version 3) If the provided buffer is invalid, the error will be reported through a signal (SIGSEGV or maybe SIGBUS if it is an alignment problem).
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