[zeromq-dev] rc == 0 (./zmq/mutex.hpp:94)

Aamir M aamirjvm at gmail.com
Mon Jul 13 20:57:55 CEST 2009

Hi Martin & Martin,

I've come up with some stand-alone code that I think reproduces the
mutex error I was describing (please see attached C++ code). If you
compile and run this code (requires Linux, 0MQ 1.0.0), you should
eventually see this output:

Invalid argument (./zmq/mutex.hpp:97)
Invalid argument (./zmq/mutex.hpp:97)

The offending line of code appears to be zmq_mutex_error.cpp:50:

zmq::message_t msg_out( 64 );

If I comment out this line and instead uncomment line 45 (which simply
moves the declaration of msg_out to outside of the while loop) then
the mutex error does not occur. I'm a little hazy on why this is
happening and what the proper 0MQ library usage should be in this


On Mon, Jul 13, 2009 at 11:34 AM, Martin Sustrik<sustrik at fastmq.com> wrote:
> Martin Hurton wrote:
>> Hi Aamir,
>> Please apply the attached patch to 0.6.1 tree and let us know what's
>> printed when the assertion fails.
> Actually, I've applied similar patch to v1.0.0, so you may alternatively use
> version 1.0.0 instead of 0.6.1.
> Martin
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