[Click] Patch for nanosecond scheduling precision in ns-3-click

[Eddie Kohler]

Hi Lalith,

This change looks generally good, but surely ns defines some version 
variables that we can use to detect whether "cursimnode->curtime" is a 
timespec or a timeval. If it doesn't, then please add one: #define 
NS_CURTIME_IS_TIMESPEC 1. Then Click can be made to work cleanly with 
either, for instance:

#if NS_CURTIME_IS_TIMESPEC
   *ts = cursimnode->curtime;
#else
   ts->tv_sec = cursimnode->curtime.tv_sec;
   ts->tv_nsec = cursimnode->curtime.tv_usec * 1000;
#endif

The timer scheduling code in routerthread.cc would also need a fork: #if 
CLICK_NS && NS_CURTIME_IS_TIMESPEC /timespec-code/ #elif CLICK_NS 
/timeval-code/ #endif.

Make sense?

Sascha, did you end up trying this?
Eddie


On 12/31/11 7:46 AM, Lalith Suresh wrote:
> Hello all,
>
> After Sascha raised this issue on the ns-3-users list [1], I tried
> making a quick patch to make Click's NS code use timespec, and make
> the corresponding changes on the ns-3 side as well.
>
> I've pushed the changes to my ns-3-click [2] and Click [3]
> repositories. Kindly review. I'll push to ns-3-dev once the Click side
> changes are applied. Note that this will probably break the ns-2
> patches for nsclick.
>
>
> [1] http://groups.google.com/group/ns-3-users/browse_thread/thread/2be8d60531bd82a8
> [2] http://code.nsnam.org/lalith/ns-3-click-dev
> [3] https://github.com/lalithsuresh/click
>