From d14be62499478f31cf641399982ecdf4f6f158c4 Mon Sep 17 00:00:00 2001
From: Steven McCoy <steven.mccoy@miru.hk>
Date: Tue, 28 Sep 2010 22:46:56 +0200
Subject: more fixes to (e)pgm transport

---
 src/pgm_sender.cpp | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

(limited to 'src/pgm_sender.cpp')

diff --git a/src/pgm_sender.cpp b/src/pgm_sender.cpp
index 5c9020d..82a37ab 100644
--- a/src/pgm_sender.cpp
+++ b/src/pgm_sender.cpp
@@ -123,8 +123,19 @@ zmq::pgm_sender_t::~pgm_sender_t ()
 
 void zmq::pgm_sender_t::in_event ()
 {
+    if (has_rx_timer) {
+        cancel_timer (rx_timer_id);
+        has_rx_timer = false;
+    }
+
     //  In event on sender side means NAK or SPMR receiving from some peer.
     pgm_socket.process_upstream ();
+    const int last_errno = errno;
+    if (last_errno == ENOMEM || last_errno == EBUSY) {
+        const long timeout = pgm_socket.get_rx_timeout ();
+        add_timer (timeout, rx_timer_id);
+        has_rx_timer = true;
+    }
 }
 
 void zmq::pgm_sender_t::out_event ()
@@ -152,14 +163,36 @@ void zmq::pgm_sender_t::out_event ()
         put_uint16 (out_buffer, offset == -1 ? 0xffff : (uint16_t) offset);
     }
 
+    if (has_rx_timer) {
+        cancel_timer (rx_timer_id);
+        has_rx_timer = false;
+    }
+
     //  Send the data.
     size_t nbytes = pgm_socket.send (out_buffer, write_size);
 
     //  We can write either all data or 0 which means rate limit reached.
-    if (nbytes == write_size)
+    if (nbytes == write_size) {
         write_size = 0;
-    else
+    } else {
         zmq_assert (nbytes == 0);
+
+        if (errno == ENOMEM) {
+            const long timeout = pgm_socket.get_tx_timeout ();
+            add_timer (timeout, tx_timer_id);
+            has_tx_timer = true;
+        } else
+            zmq_assert (errno == EBUSY);
+    }
+}
+
+void zmq::pgm_sender_t::timer_event (int token)
+{
+    if (token == rx_timer_id)
+        in_event ();
+
+    zmq_assert (token == tx_timer_id);
+    out_event ();
 }
 
 #endif
-- 
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