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authorJames Goppert <james.goppert@gmail.com>2013-07-28 01:35:43 -0400
committerJames Goppert <james.goppert@gmail.com>2013-07-28 01:35:43 -0400
commit1980d9dd63e29390f7c3ba9b31be576c07706f73 (patch)
tree22b8cebc3474bc897555db19c2810e1e102a9f15 /src/modules/controllib/block/UOrbSubscription.hpp
parent95aa82f586a8c44c53ae48517efdeb5e5673b7b5 (diff)
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Working on segway controller, restructure of fixedwing.
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-/****************************************************************************
- *
- * 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 UOrbSubscription.h
- *
- */
-
-#pragma once
-
-#include <uORB/uORB.h>
-#include "Block.hpp"
-#include "List.hpp"
-
-
-namespace control
-{
-
-class Block;
-
-/**
- * Base subscription warapper class, used in list traversal
- * of various subscriptions.
- */
-class __EXPORT UOrbSubscriptionBase :
- public ListNode<control::UOrbSubscriptionBase *>
-{
-public:
-// methods
-
- /**
- * Constructor
- *
- * @param meta The uORB metadata (usually from the ORB_ID() macro)
- * for the topic.
- */
- UOrbSubscriptionBase(
- List<UOrbSubscriptionBase *> * list,
- const struct orb_metadata *meta) :
- _meta(meta),
- _handle() {
- if (list != NULL) list->add(this);
- }
- bool updated();
- void update() {
- if (updated()) {
- orb_copy(_meta, _handle, getDataVoidPtr());
- }
- }
- virtual void *getDataVoidPtr() = 0;
- virtual ~UOrbSubscriptionBase() {
- orb_unsubscribe(_handle);
- }
-// accessors
- const struct orb_metadata *getMeta() { return _meta; }
- int getHandle() { return _handle; }
-protected:
-// accessors
- void setHandle(int handle) { _handle = handle; }
-// attributes
- const struct orb_metadata *_meta;
- int _handle;
-};
-
-/**
- * UOrb Subscription wrapper class
- */
-template<class T>
-class __EXPORT UOrbSubscription :
- public T, // this must be first!
- public UOrbSubscriptionBase
-{
-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.
- * @param interval The minimum interval in milliseconds between updates
- */
- UOrbSubscription(
- List<UOrbSubscriptionBase *> * list,
- const struct orb_metadata *meta, unsigned interval) :
- T(), // initialize data structure to zero
- UOrbSubscriptionBase(list, meta) {
- setHandle(orb_subscribe(getMeta()));
- orb_set_interval(getHandle(), interval);
- }
-
- /**
- * Deconstructor
- */
- virtual ~UOrbSubscription() {}
-
- /*
- * 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); }
- T getData() { return T(*this); }
-};
-
-} // namespace control