Add delay before reconnecting

So far ZMQ_RECONNECT_IVL delay was used only when TCP connect
failed. Now it is used even if connect succeeds and the peer
closes the connection afterwards.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

src/config.hpp

@@ -65,9 +65,6 @@ namespace zmq
         //  Maximum number of events the I/O thread can process in one go.
         max_io_events = 256,
 
-        //  Should initial connection attempts be delayed?
-        wait_before_connect = false,
-
         //  Maximal delay to process command in API thread (in CPU ticks).
         //  3,000,000 ticks equals to 1 - 2 milliseconds on current CPUs.
         //  Note that delay is only applied when there is continuous stream of

src/connect_session.cpp

@@ -38,10 +38,10 @@ zmq::connect_session_t::~connect_session_t ()
 void zmq::connect_session_t::process_plug ()
 {
     //  Start connection process immediately.
-    start_connecting ();
+    start_connecting (false);
 }
 
-void zmq::connect_session_t::start_connecting ()
+void zmq::connect_session_t::start_connecting (bool wait_)
 {
     //  Choose I/O thread to run connecter in. Given that we are already
     //  running in an I/O thread, there must be at least one available.
@@ -54,7 +54,8 @@ void zmq::connect_session_t::start_connecting ()
     if (protocol == "tcp" || protocol == "ipc") {
 
         zmq_connecter_t *connecter = new (std::nothrow) zmq_connecter_t (
-            io_thread, this, options, protocol.c_str (), address.c_str ());
+            io_thread, this, options, protocol.c_str (), address.c_str (),
+            wait_);
         zmq_assert (connecter);
         launch_child (connecter);
         return;
@@ -112,6 +113,6 @@ void zmq::connect_session_t::attached (const blob_t &peer_identity_)
 void zmq::connect_session_t::detached ()
 {
     //  Reconnect.
-    start_connecting ();
+    start_connecting (true);
 }
 

src/connect_session.hpp

@@ -46,7 +46,7 @@ namespace zmq
         void detached ();
 
         //  Start the connection process.
-        void start_connecting ();
+        void start_connecting (bool wait_);
 
         //  Command handlers.
         void process_plug ();

src/zmq_connecter.cpp

@@ -35,11 +35,11 @@
 
 zmq::zmq_connecter_t::zmq_connecter_t (class io_thread_t *io_thread_,
       class session_t *session_, const options_t &options_,
-      const char *protocol_, const char *address_) :
+      const char *protocol_, const char *address_, bool wait_) :
     own_t (io_thread_, options_),
     io_object_t (io_thread_),
     handle_valid (false),
-    wait (wait_before_connect),
+    wait (wait_),
     session (session_),
     current_reconnect_ivl(options.reconnect_ivl)
 {

src/zmq_connecter.hpp

@@ -36,7 +36,7 @@ namespace zmq
         //  connection process.
         zmq_connecter_t (class io_thread_t *io_thread_,
             class session_t *session_, const options_t &options_,
-            const char *protocol_, const char *address_);
+            const char *protocol_, const char *address_, bool delay_);
         ~zmq_connecter_t ();
 
     private: