From 4ed70a930202b103e7e80b8dc925e0aaa4622595 Mon Sep 17 00:00:00 2001
From: Martin Sustrik <sustrik@fastmq.commkdir>
Date: Wed, 29 Jul 2009 12:07:54 +0200
Subject: initial commit

---
 src/pipe_writer.cpp | 120 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 src/pipe_writer.cpp

(limited to 'src/pipe_writer.cpp')

diff --git a/src/pipe_writer.cpp b/src/pipe_writer.cpp
new file mode 100644
index 0000000..173cf97
--- /dev/null
+++ b/src/pipe_writer.cpp
@@ -0,0 +1,120 @@
+/*
+    Copyright (c) 2007-2009 FastMQ Inc.
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the Lesser GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    Lesser GNU General Public License for more details.
+
+    You should have received a copy of the Lesser GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "../include/zs.h"
+
+#include "pipe_writer.hpp"
+#include "pipe.hpp"
+#include "i_demux.hpp"
+
+zs::pipe_writer_t::pipe_writer_t (object_t *parent_, pipe_t *pipe_,
+      object_t *peer_, uint64_t hwm_, uint64_t lwm_) :
+    object_t (parent_),
+    pipe (pipe_),
+    peer (peer_),
+    demux (NULL),
+    index (-1),
+    hwm (hwm_),
+    lwm (lwm_),
+    head (0),
+    tail (0)
+{
+}
+
+zs::pipe_writer_t::~pipe_writer_t ()
+{
+}
+
+void zs::pipe_writer_t::set_demux (i_demux *demux_)
+{
+    demux = demux_;
+}
+
+void zs::pipe_writer_t::set_index (int index_)
+{
+    index = index_;
+}
+
+int zs::pipe_writer_t::get_index ()
+{
+    return index;
+}
+
+bool zs::pipe_writer_t::write (zs_msg *msg_)
+{
+    size_t msg_size = zs_msg_size (msg_);
+
+    //  If message won't fit into the in-memory pipe, there's no way
+    //  to pass it further.
+    //  TODO: It should be discarded and 'oversized' notification should be
+    //        placed into the pipe.
+    zs_assert (!hwm || msg_size <= hwm);
+
+    //  If there's not enough space in the pipe at the moment, return false.
+    if (hwm && tail + msg_size - head > hwm)
+        return false;
+
+    //  Write the message to the pipe and adjust tail position.
+    pipe->write (*msg_);
+    flush ();
+    tail += msg_size;
+
+    return true;
+}
+
+void zs::pipe_writer_t::flush ()
+{
+    if (!pipe->flush ())
+        send_tail (peer, tail);
+}
+
+void zs::pipe_writer_t::process_head (uint64_t bytes_)
+{
+    head = bytes_;
+}
+
+void zs::pipe_writer_t::terminate ()
+{
+    //  Disconnect from the associated demux.
+    if (demux) {
+        demux->detach_pipe (this);
+        demux = NULL;
+    }
+
+    //  Push the delimiter to the pipe. Delimiter is a notification for pipe
+    //  reader that there will be no more messages in the pipe.
+    zs_msg delimiter;
+    delimiter.content = (zs_msg_content*) ZS_DELIMITER;
+    delimiter.shared = false;
+    delimiter.vsm_size = 0;
+    pipe->write (delimiter);
+    flush ();
+}
+
+void zs::pipe_writer_t::process_terminate ()
+{
+    //  Disconnect from the associated demux.
+    if (demux) {
+        demux->detach_pipe (this);
+        demux = NULL;
+    }
+
+    //  Send termination acknowledgement to the pipe reader.
+    send_terminate_ack (peer);
+}
-- 
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