Re: Measuring time differences

coder1024 wrote:
Flash Gordon wrote:

.... snip ... 

The point is you have ABSOLUTELY NO CLUE as to what might be
helpful to the OP and your suggestion of gettimeofday I can say
quite categorically is of ABSOLUTELY NO HELP and so a COMPLETE
waste of everyone's time. Hence, if you actually know the
platform you can point the poster in the right direction AND
tell them to go to a more appropriate group (suggesting a
solution without redirecting them is inappropriate), but if you
don't know the platform the ONLY thing you can sensibly do is
>> tell them to go to a more appropriate group. 

gettimeofday() will work very well if available in the OP's
development environment.  the OP didn't provide specifics as to
their environment. I do know the platform.  I've developed SW on
Windows using cygwin and gcc and successfully used
gettimeofday() when in a similar situation which is why I
suggested it.  I've also developed using Visual C++.  I don't
know about other environments (Borland C++, etc.).  Anyway, the
OP can take 2 minutes to try and call the function and will
> immediately know if it isn't there. This is more helpful than 
your ranting.  I mean, really, did you just get out of bed on
the wrong side this morning?  Dare I say... relax? :-)

Regardless, there's also the APR which will almost certainly be
available on the OP's platform if they want to put in the effort
to add a product to their environment and dependencies list.

To illustrate Flashs point, the following is perfectly valid implementation of gettimeofday():

   unsigned long gettimeofday(void) {
      return 1234;
   }

If it "isn't there" simply add it to your system library, etc. Then it will be there. However, it is somewhat doubtful that it will do what you really want. The reason is that its action, calling parameters, return values, side effects, etc. are totally undefined, because IT IS NOT STANDARDIZED. In this newsgroup we deal ONLY with the standardized C language, as defined by the various ISO standards (C89, C90, C99) and their predecessor (K&R C). This means we have a reasonable chance of knowing what we are talking about. This also means that when someone asks about a non-standard item, we send him to a newsgroup dealing with his particular system, where someone may have appropriate knowledge and where invalid answers are fairly likely to be so flagged.

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