Re: strange bug in gettimeofday function

[Christopher Faylor <cgf-use-the-mailinglist-please at cygwin dot com>]

On Sun, Feb 11, 2007 at 07:20:14PM +0300, Andrew Makhorin wrote:
>Hi,
>
>I detected a strange bug in the standard function gettimeofday.
>It *sometimes* reports the time which being expressed as the integer
>number of milliseconds is *less* than the time obtained *earlier* with
>the same function.
>
>The expression 1000000 * tv.tv_sec + tv.tv_usec is calculated in
>64-bit arithmetic, so overflow cannot happen. The negative difference
>in the time values on two successive calls is about 100 milliseconds.
>
>cygcheck.out is attached.

In cases like this a simple test case is really required.  If this is
really true then calling gettimeofday in a loop should be enough to
demonstrate the problem.

cgf

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