Avoid duplicate creation of pipes for a single session

When a session is being closed down its inbound and outbound
pipe pointers are set to null. If (re) connection happens at
that time, session may try to reinistantiate the pipes which
is wrong. This patch allows session to attach pipes only once
in its lifetime.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/session.hpp b/src/session.hpp
index d4b6ad9..7e528de 100644
--- a/src/session.hpp
+++ b/src/session.hpp
@@ -117,6 +117,9 @@ namespace zmq
         //  the engines into the same thread.
         class io_thread_t *io_thread;
 
+        //  If true, pipes were already attached to this session.
+        bool pipes_attached;
+
         //  If true, delimiter was already read from the inbound pipe.
         bool delimiter_processed;