[lwip-users] sys_msleep

[Tyrel Newton]

In sys.h, there is a #ifndef guard around the sys_msleep declaration. 
Presumably, this is so that a sys_arch.h implementation could provide a 
macro for sys_msleep, i.e. a macro against a similarly named "task 
delay" function. If this indeed the case, there should be a similar 
#ifndef guard in sys.c so the built-in function is only defined if it 
needs to be. Otherwise, it might be prudent to just ditch the sys.c file 
altogether since I think most operating systems provide "sleep" 
functions if they also provide semaphore waiting functions. Then you 
wouldn't need the somewhat kludgy implementation of sys_msleep in sys.c.

Tyrel