Re: [lwip-users] Uninitialized semaphore in TCP netconn_connect() when LWIP_NETCONN_SEM_PER_THREAD

[Grant Edwards]

On 2022-04-12, Grant Edwards <grant.b.edwards@gmail.com> wrote:

> Where does msg->op_completed_sem get initialized?

I missed the netconn_apimsg() step.  That's where it gets set:

   117  static err_t
   118  netconn_apimsg(tcpip_callback_fn fn, struct api_msg *apimsg)
   119  {
   ...
   127  #if LWIP_NETCONN_SEM_PER_THREAD
   128    apimsg->op_completed_sem = LWIP_NETCONN_THREAD_SEM_GET();
   129  #endif /* LWIP_NETCONN_SEM_PER_THREAD */
   ...
   136  }

So the problem is that LWIP_NETCONN_THREAD_SEM_ALLOC() is never
getting called.

Are user threads that use the netconn API with
LWIP_NETCONN_SEM_PER_THREAD enabled required to call
netconn_thread_init()?

Where are things like this documented?

I've searched for netconn_thread_init in the 2.1.3 docs, and can't
find it.

-- 
Grant