[zeromq-dev] C++ - Poll multiple sockets in different classes

[Piero Cornice]

  On 06/10/10 12:21, Pieter Hintjens wrote:
> Piero,
>
> What version or branch of 0MQ are you using?
>
> -Pieter

I've tried Linux versions 2.0.7, 2.0.9 and development (cloned 
yesterday's zeromq2 repo).

There may be something wrong with my code, but can't see what.

> On Wed, Oct 6, 2010 at 11:10 AM, Piero Cornice
> <piero.cornice at provision-comm.com> wrote:
>> Hi everyone,
>>
>> I'm writing a TCP server to which I can "plug" multiple TCP sockets at
>> runtime.
>>
>> The structure is pretty simple. There's a "MultiServer" class (the actual
>> server) and a "TCPListener" class, which contains a TCP socket. The 
>> Server
>> creates a ZMQ context, passes it to a Listener [setup()] and then 
>> polls all
>> listeners' [receive()].
>>
>> The problem is that I'm getting a segmentation fault on the poll(), see
>> below for GDB output.
>> Here's a snippet demonstrating my problem: http://pastebin.com/tckkL1FW.
>>
>> Any hint will be much appreciated, thank you.
>>
>> --- GDB output ---
>>
>> [Thread debugging using libthread_db enabled]
>> [New Thread 0x7ffff7d8a710 (LWP 20509)]
>> [TCP] Binding to tcp://*:25000
>> [+] Added TCPListener ffffdd30 (socket: 6063a0)
>> [ ] Polling 1 listener(s)...
>> [0] { 6063a0 | 0 | 1 | 0 }
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> zmq::signaler_t::get_fd (this=0x30) at signaler.cpp:38
>> 38    {
>> (gdb) bt
>> #0  zmq::signaler_t::get_fd (this=0x30) at signaler.cpp:38
>> #1  0x00007ffff7dc0935 in zmq_poll (items_=0x7fffffffdc60,
>>     nitems_=<value optimized out>, timeout_=-1) at zmq.cpp:421
>> #2  0x00000000004022eb in zmq::poll(zmq_pollitem_t*, int, long) ()
>> #3  0x0000000000401eeb in MultiServer::receive(long) ()
>> #4  0x0000000000402034 in main ()
>>
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