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The answer is simple: using two threads on the same
socket is not supported by lwIP.
----- Original Message -----
Sent: Sunday, September 13, 2009 3:05
AM
Subject: [lwip-users] Issue in closing
blocked sockets
Hello,
I have this implementation that uses 2
threads. One is opening a socket and the other will trigger the close
socket.
In the first thread, I call recvfrom, and it is blocking
at some point in the sys_arch_mbox_fetch(). Now, if the other thread
will close(calling lwip_close) the socket, recvfrom() will not be able
to continue since it is blocking. Do you have any idea how to handle
this scenario in lwIP?
The issue is when we call lwip_close;
there is an assertion "Error releasing mutex". What we did is, we see in
the netconn_recv function it is using conn->recvmbox as its object.
So, in lwip_close we call sys_mbox_post(recvmbox, NULL) before
netconn_delete(sock->conn). The operation continues as we expected
but at somepoint our application stops. Maybe this is not right thing to
do? Please advice.
Thanks. |
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