Re: [naviserver-devel] UIO_MAXIOV

[Zoran V. <zv...@ar...>]

Am 20.02.2007 um 15:23 schrieb Zoran Vasiljevic:

> Hi!
>
> I haven't updated the sources for quite a long time!
> We don't compile on anything else but Linux :-(
>
> Anyways, the UIO_MAXIOV seems to be defined only for
> Linux. Neither Mac OSX nor Sun Solaris (not to mention
> the Windows) define such constant. By looking arround
> I see people can not find a peace of mind with it.
> It varies between 16 and 1024 on different platforms etc.
> I will be conservative and define that to 16 on all
> systems that have no UIO_MAXIOV unless somebody has a
> better idea.
>

Now, look at that.... Isn't that nice :-(

34 	#ifndef UIO_MAXIOV
35 	# if defined(__FreeBSD__) || defined(__APPLE__) || defined 
(__NetBSD__)
36 	/* FreeBSD 4.7 defines it in sys/uio.h only if _KERNEL is  
specified */
37 	#  define UIO_MAXIOV 1024
38 	# elif defined(__sgi)
39 	/* IRIX 6.5 has sysconf(_SC_IOV_MAX) which might return 512 or  
bigger */
40 	#  define UIO_MAXIOV 512
41 	# elif defined(__sun)
42 	/* Solaris (and SunOS?) defines IOV_MAX instead */
43 	#  ifndef IOV_MAX
44 	#   define UIO_MAXIOV 16
45 	#  else
46 	#   define UIO_MAXIOV IOV_MAX
47 	#  endif
48 	# elif defined(IOV_MAX)
49 	#  define UIO_MAXIOV IOV_MAX
50 	# else
51 	#  error UIO_MAXIOV nor IOV_MAX are defined
52 	# endif
53 	#endif
54