[zeromq-dev] Event zmq-signaler-port-sync leaking

Pieter Hintjens ph at imatix.com
Sat Dec 22 12:14:29 CET 2012

When I run the same code in C, with valgrind, I don't see any memory
leaks. Does the C++ runtime not use the heap?

#include <czmq.h>

int main (void)
    zctx_t *ctx = zctx_new ();
    int i;
    for (i = 0; i < 1000; ++i) {
        void *front = zsocket_new (ctx, ZMQ_PAIR);
        void *back  = zsocket_new (ctx, ZMQ_PAIR);
        zsocket_bind (front, "inproc://test%d", i);
        zsocket_connect (back, "inproc://test%d", i);
    zctx_destroy (&ctx);
    return 0;


On Thu, Dec 20, 2012 at 1:50 PM, Felipe Farinon
<felipe.farinon at powersyslab.com> wrote:
> I'm using version 3.2.2 of ZeroMQ, running on a Windows 7, compiled with
> a MSVC 10.
> The following piece of code reproduces the problem:
> http://pastebin.com/6p2sLaEM
> It seems that if we create lots of PAIR sockets in Windows, we get an
> event leak. The event leak is shown by this image, taken at the end of
> the loop execution:
> https://dl.dropbox.com/u/2612634/leak.png
> The error is in signaler.cpp method zmq::signaler_t::make_fdpair, which
> creates the events but never releases them.
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