[lwip-devel] [bug #44490] conn->op_completed which signal by do_recv() may be taken by netconn_write_partly() or lost

[wangyu]

URL:
  <http://savannah.nongnu.org/bugs/?44490>

                 Summary: conn->op_completed which signal by do_recv() may be
taken by netconn_write_partly() or lost
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: honghongbuqi
            Submitted on: Mon Mar  9 05:58:40 2015
                Category: TCP
                Severity: 3 - Normal
              Item Group: Feature Request
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: 1.4.1

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Details:

hi:
  I'm sorry to disturb you. there is Some things I am not quite understand.
  Every time a new connection established， the netconn_alloc() must Creating
a signal. (sys_sem_new(&conn->op_completed, 0)). the conn->op_completed while
be signal by do_recv() or do_writemore(), and be taken by
netconn_write_partly() or netconn_recved().
 NOW， Receive and transmit at the same time， do_recv() signal the
conn->op_completed and do_writemore() signal the conn->op_completed too.
following, the netconn_write_partly() take signal conn->op_completed, but the
netconn_recved() take signal is not successed. 

  Why not two signals, one for transmit and one for receive???




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