Introduces bi-directional pipes

So far, there was a pair of unidirectional pipes between a socket
and a session (or an inproc peer). This resulted in complex
problems with half-closed states and tracking which inpipe
corresponds to which outpipe.

This patch doesn't add any functionality in itself, but is
essential for further work on features like subscription
forwarding.

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

1 files changed, 20 insertions, 6 deletions

diff --git a/src/push.cpp b/src/push.cpp
index d6ee399..12fc8d2 100644
--- a/src/push.cpp
+++ b/src/push.cpp
@@ -28,19 +28,33 @@ zmq::push_t::push_t (class ctx_t *parent_, uint32_t tid_) :
     lb (this)
 {
     options.type = ZMQ_PUSH;
-    options.requires_in = false;
-    options.requires_out = true;
 }
 
 zmq::push_t::~push_t ()
 {
 }
 
-void zmq::push_t::xattach_pipes (class reader_t *inpipe_,
-    class writer_t *outpipe_, const blob_t &peer_identity_)
+void zmq::push_t::xattach_pipe (pipe_t *pipe_, const blob_t &peer_identity_)
 {
-    zmq_assert (!inpipe_ && outpipe_);
-    lb.attach (outpipe_);
+    zmq_assert (pipe_);
+    pipe_->set_event_sink (this);
+    lb.attach (pipe_);
+}
+
+void zmq::push_t::read_activated (pipe_t *pipe_)
+{
+    //  There are no inbound messages in push socket. This should never happen.
+    zmq_assert (false);
+}
+
+void zmq::push_t::write_activated (pipe_t *pipe_)
+{
+    lb.activated (pipe_);
+}
+
+void zmq::push_t::terminated (pipe_t *pipe_)
+{
+    lb.terminated (pipe_);
 }
 
 void zmq::push_t::process_term (int linger_)