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

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• Hash : 8fb59b8f
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  Date : 2017-07-06T01:10:39
  

  doc: Update for MSVC 14.
  
  * doc/posix-headers/*.texi: Add info about MSVC 14.
  * doc/posix-functions/*.texi: Likewise.
  * doc/pastposix-functions/*.texi: Likewise.
  * doc/glibc-headers/*.texi: Likewise.
  * doc/glibc-functions/*.texi: Likewise.
  

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• doc/posix-functions/gettimeofday.texi

• @node gettimeofday
  @section @code{gettimeofday}
  @findex gettimeofday
  
  POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/gettimeofday.html}
  
  Gnulib module: gettimeofday
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function is missing on some platforms:
  MSVC 14.
  @item
  This function is declared with a nonstandard function prototype (only one
  argument, or ``...'' after the first argument) on some platforms.
  @item
  On some platforms, the second argument has type @code{struct
  timezone*} rather than @code{void *}, making it an error to redeclare
  the function with the POSIX signature:
  glibc.
  However, rather than penalize these systems with a replacement
  function, gnulib defines @code{GETTIMEOFDAY_TIMEZONE} to the
  appropriate type for use in avoiding a compiler warning if assigning
  @code{gettimeofday} to a function pointer.
  @item
  On some platforms, @code{gettimeofday} clobbers the buffer in which
  @code{localtime} returns its result:
  Mac OS X 10.0.
  @item
  This function has only a precision of 15.6 milliseconds on some platforms:
  mingw.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  Behavior is non-portable if the second argument to @code{gettimeofday}
  is not @code{NULL}.
  @end itemize
  

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