kc3-lang/gnulib/doc/posix-functions/clock_getres.texi

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• Hash : d45d1618
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  Date : 2021-12-28T12:03:37
  

  clock_getres: document portability issues better
  
  * doc/posix-functions/clock_getres.texi:
  * doc/posix-functions/timespec_getres.texi:
  Document problems with timestamp resolution.
  

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• doc/posix-functions/clock_getres.texi

• @node clock_getres
  @section @code{clock_getres}
  @findex clock_getres
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/clock_getres.html}
  
  Gnulib module: ---
  
  Portability problems fixed by Gnulib:
  @itemize
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  This function is missing on some platforms:
  Mac OS X 10.11, Minix 3.1.8, mingw, MSVC 14.
  
  @item
  On many platforms, this function returns a value other than the clock
  resolution of @code{clock_gettime}, i.e., the minimum distance between
  differing timestamps.  For example, on AIX 7.2 it returns 10
  milliseconds even though the clock resolution is 1 microsecond.
  Conversely, on GNU/Linux it typically returns 1 nanosecond even
  though the clock resolution may be greater.
  @end itemize
  
  The Gnulib module @code{gettime-res} is a partial substitute; it implements
  the @code{CLOCK_REALTIME} functionality of @code{clock_getres},
  and fixes the too-high resolution bug of platforms like AIX 7.2.
  

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