[ssc-devel] WAIT-CONDVAR/TIMEOUT is not implementable.

[Marco Monteiro]

The problem is that after the lock is released, we cannot respect the 
timeout because we must re-acquire the lock before returning.

Three possible solutions:
	* drop the function
	* change the semantics so that the lock is not re-acquired before the 
function returns
	* specify that the re-acquiring of the lock has this problem and the 
function cannot be used reliably (although it is still useful in most 
cases.)

POSIX threads has the third behaviour. The second is not the right 
thing(R), but I see uses for it.

Comments, please.

Cheers,

Marco