From 8888b73e160520e5b15e168998013f4a5f6e64c0 Mon Sep 17 00:00:00 2001
From: jgoppert <james.goppert@gmail.com>
Date: Sun, 6 Jan 2013 15:41:23 -0500
Subject: Added control library.

---
 apps/systemlib/control/block/UOrbPublication.hpp | 118 +++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 apps/systemlib/control/block/UOrbPublication.hpp

(limited to 'apps/systemlib/control/block/UOrbPublication.hpp')

diff --git a/apps/systemlib/control/block/UOrbPublication.hpp b/apps/systemlib/control/block/UOrbPublication.hpp
new file mode 100644
index 000000000..a36f4429f
--- /dev/null
+++ b/apps/systemlib/control/block/UOrbPublication.hpp
@@ -0,0 +1,118 @@
+/****************************************************************************
+ *
+ *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name PX4 nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/**
+ * @file UOrbPublication.h
+ *
+ */
+
+#pragma once
+
+#include <uORB/uORB.h>
+#include "Block.hpp"
+#include "List.hpp"
+
+
+namespace control
+{
+
+class Block;
+
+/**
+ * Base publication warapper class, used in list traversal
+ * of various publications.
+ */
+class __EXPORT UOrbPublicationBase : public ListNode<control::UOrbPublicationBase *>
+{
+public:
+
+	UOrbPublicationBase(
+		List<UOrbPublicationBase *> * list,
+		const struct orb_metadata *meta) :
+		_meta(meta),
+		_handle() {
+		if (list != NULL) list->add(this);
+	}
+	void update() {
+		orb_publish(getMeta(), getHandle(), getDataVoidPtr());
+	}
+	virtual void *getDataVoidPtr() = 0;
+	virtual ~UOrbPublicationBase() {
+		orb_unsubscribe(getHandle());
+	}
+	const struct orb_metadata *getMeta() { return _meta; }
+	int getHandle() { return _handle; }
+protected:
+	void setHandle(orb_advert_t handle) { _handle = handle; }
+	const struct orb_metadata *_meta;
+	orb_advert_t _handle;
+};
+
+/**
+ * UOrb Publication wrapper class
+ */
+template<class T>
+class UOrbPublication :
+	public T, // this must be first!
+	public UOrbPublicationBase
+{
+public:
+	/**
+	 * Constructor
+	 *
+	 * @param list      A list interface for adding to list during construction
+	 * @param meta		The uORB metadata (usually from the ORB_ID() macro)
+	 *			for the topic.
+	 */
+	UOrbPublication(
+		List<UOrbPublicationBase *> * list,
+		const struct orb_metadata *meta) :
+		T(), // initialize data structure to zero
+		UOrbPublicationBase(list, meta) {
+		// It is important that we call T()
+		// before we publish the data, so we
+		// call this here instead of the base class
+		setHandle(orb_advertise(getMeta(), getDataVoidPtr()));
+	}
+	virtual ~UOrbPublication() {}
+	/*
+	 * XXX
+	 * This function gets the T struct, assuming
+	 * the struct is the first base class, this
+	 * should use dynamic cast, but doesn't
+	 * seem to be available
+	 */
+	void *getDataVoidPtr() { return (void *)(T *)(this); }
+};
+
+} // namespace control
-- 
cgit v1.2.3