Document poll() problem

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2025 42af7a65-404d-4744-a932-0658087f49c3

TODO

-NuttX TODO List (Last updated August 8, 2009)
+NuttX TODO List (Last updated August 16, 2009)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
   (5)  Task/Scheduler (sched/)
@@ -234,6 +234,14 @@ o Network (net/, netutils/)
   Status:      Open, depends on UDP read-ahead support
   Priority:    Medium
 
+  Description: poll()/select() only works for availability of buffered TCP
+               read data (when read-ahead is enabled).  The way writing is
+               handled in uIP, all sockets must wait when send and cannot
+               be notifiied when they can send without waiting.
+  Status:      Open, probably will not be fixed.
+  Priority:    Medium... this does effect porting of applications that expect
+               different behavior from poll()/select()
+
   Description: sockets do not support all modes except for O_NONBLOCK. Sockets
                support only (1) TCP/IP non-blocking read operations when read-ahead
 	       buffering is enabled, and (2) TCP/IP accept() operations when TCP/IP