RE: [ECOS] Network programming for eCos under linux

["Trenton D. Adams" <tadams at theone dot dnsalias dot com>]

  > 
  > > So, how would one go about making a buffer word aligned or DWORD
  > aligned
  > > just to be safe?
  > 
  > something along the lines of:
  > 
  > char buffer[1024];
  > #define ALIGNMENT 8
  > #define ALIGNUP(_x_) (((char *)(_x_) + ALIGN-1) & ~(ALIGN-1))
  > int *foo = ALIGNUP(buffer);
  > 
  > You could also use __alignof(int) to give the alignment but that's
  > obviously a GNU C-ism.
  > 

First of all, I assume your ALIGN is actually supposed to be ALIGNMENT!

I don't understand your macro.  Let's say _x_ happens to be memory
address 0x201 the macro formula would go like this

= (0x201 + 7) & ~(7)
= 0x208 & 0xfffffff8
= 0x208

So, now foo is pointing to an integer that is not at the beginning of
the buffer.  This would mean that I couldn't put anything at the
beginning of the buffer, correct?