From f74d3dae8f2ec423c61932b4ad0359f98b996a51 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Fri, 29 Mar 2013 17:31:06 -0400
Subject: gruel: moved gruel into subdirs of gnuradio-runtime.
PMTs are handled slightly different and are installed into their own module and include dir.
---
gnuradio-runtime/lib/messages/msg_queue.cc | 105 +++++++++++++++++++++++++++++
1 file changed, 105 insertions(+)
create mode 100644 gnuradio-runtime/lib/messages/msg_queue.cc
(limited to 'gnuradio-runtime/lib/messages/msg_queue.cc')
diff --git a/gnuradio-runtime/lib/messages/msg_queue.cc b/gnuradio-runtime/lib/messages/msg_queue.cc
new file mode 100644
index 0000000000..0d460dc05c
--- /dev/null
+++ b/gnuradio-runtime/lib/messages/msg_queue.cc
@@ -0,0 +1,105 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2009,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <messages/msg_queue.h>
+#include <stdexcept>
+
+using namespace pmt;
+
+namespace gr {
+ namespace messages {
+
+ msg_queue_sptr
+ make_msg_queue(unsigned int limit)
+ {
+ return msg_queue_sptr(new msg_queue(limit));
+ }
+
+ msg_queue::msg_queue(unsigned int limit)
+ : d_limit(limit)
+ {
+ }
+
+ msg_queue::~msg_queue()
+ {
+ flush();
+ }
+
+ void
+ msg_queue::insert_tail(pmt_t msg)
+ {
+ gr::thread::scoped_lock guard(d_mutex);
+
+ while(full_p())
+ d_not_full.wait(guard);
+
+ d_msgs.push_back(msg);
+ d_not_empty.notify_one();
+ }
+
+ pmt_t
+ msg_queue::delete_head()
+ {
+ gr::thread::scoped_lock guard(d_mutex);
+
+ while(empty_p())
+ d_not_empty.wait(guard);
+
+ pmt_t m(d_msgs.front());
+ d_msgs.pop_front();
+
+ if(d_limit > 0) // Unlimited length queues never block on write
+ d_not_full.notify_one();
+
+ return m;
+ }
+
+ pmt_t
+ msg_queue::delete_head_nowait()
+ {
+ gr::thread::scoped_lock guard(d_mutex);
+
+ if(empty_p())
+ return pmt_t();
+
+ pmt_t m(d_msgs.front());
+ d_msgs.pop_front();
+
+ if(d_limit > 0) // Unlimited length queues never block on write
+ d_not_full.notify_one();
+
+ return m;
+ }
+
+ void
+ msg_queue::flush()
+ {
+ while(delete_head_nowait() != pmt_t())
+ ;
+ }
+
+ } /* namespace messages */
+} /* namespace gr */
--
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