From f3e2e07201c50033bf6c9d0c6a6f068557b4f17f Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Wed, 17 Apr 2013 13:43:52 -0400
Subject: runtime: converting runtime core to gr namespace, gnuradio include
dir.
---
gnuradio-runtime/include/gnuradio/msg_queue.h | 95 +++++++++++++++++++++++++++
1 file changed, 95 insertions(+)
create mode 100644 gnuradio-runtime/include/gnuradio/msg_queue.h
(limited to 'gnuradio-runtime/include/gnuradio/msg_queue.h')
diff --git a/gnuradio-runtime/include/gnuradio/msg_queue.h b/gnuradio-runtime/include/gnuradio/msg_queue.h
new file mode 100644
index 0000000000..3326cf9a7f
--- /dev/null
+++ b/gnuradio-runtime/include/gnuradio/msg_queue.h
@@ -0,0 +1,95 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2009 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.
+ */
+
+#ifndef INCLUDED_GR_MSG_QUEUE_H
+#define INCLUDED_GR_MSG_QUEUE_H
+
+#include <gnuradio/api.h>
+#include <gnuradio/msg_handler.h>
+#include <gnuradio/thread/thread.h>
+
+namespace gr {
+
+ /*!
+ * \brief thread-safe message queue
+ * \ingroup misc
+ */
+ class GR_RUNTIME_API msg_queue : public msg_handler
+ {
+ gr::thread::mutex d_mutex;
+ gr::thread::condition_variable d_not_empty;
+ gr::thread::condition_variable d_not_full;
+ message::sptr d_head;
+ message::sptr d_tail;
+ unsigned int d_count; // # of messages in queue.
+ unsigned int d_limit; // max # of messages in queue. 0 -> unbounded
+
+ public:
+ typedef boost::shared_ptr<msg_queue> sptr;
+
+ static sptr make(unsigned int limit=0);
+
+ msg_queue(unsigned int limit);
+ ~msg_queue();
+
+ //! Generic msg_handler method: insert the message.
+ void handle(message::sptr msg) { insert_tail (msg); }
+
+ /*!
+ * \brief Insert message at tail of queue.
+ * \param msg message
+ *
+ * Block if queue if full.
+ */
+ void insert_tail(message::sptr msg);
+
+ /*!
+ * \brief Delete message from head of queue and return it.
+ * Block if no message is available.
+ */
+ message::sptr delete_head();
+
+ /*!
+ * \brief If there's a message in the q, delete it and return it.
+ * If no message is available, return 0.
+ */
+ message::sptr delete_head_nowait();
+
+ //! Delete all messages from the queue
+ void flush();
+
+ //! is the queue empty?
+ bool empty_p() const { return d_count == 0; }
+
+ //! is the queue full?
+ bool full_p() const { return d_limit != 0 && d_count >= d_limit; }
+
+ //! return number of messages in queue
+ unsigned int count() const { return d_count; }
+
+ //! return limit on number of message in queue. 0 -> unbounded
+ unsigned int limit() const { return d_limit; }
+ };
+
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_MSG_QUEUE_H */
--
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