MT-safe string, part 1

[Nathan Myers]

On Wed, Mar 15, 2000 at 05:55:44PM -0500, George T. Talbot wrote:
> In your patch, I see you changed _M_state from int to uint32_t.
> 
> Sure you meant to do that?  Here's your comparison:
> 
> 	if (exchange_and_add(&_M_state, -1) <= 0)
> 
> Unsigned will never be < 0, right?

Right.  It should be something like

  if (int(exchange_and_add(reinterpret_cast<uint32_t*>(&_M_state), -1)) <= 0)

Better, the direct uses of _M_state should be replaced by 
functions which hide all the casts & similar magic.  I will
prepare a new patch.

Nathan Myers
ncm@nospam.cantrip.org