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Add macro for multi topic support

This commit is contained in:
Lorenz Meier 2014-10-11 00:25:10 +02:00
parent da977bb39b
commit 0e84f60826
1 changed files with 27 additions and 0 deletions
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27
src/modules/uORB/uORB.h
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@ -67,6 +67,33 @@ typedef const struct orb_metadata *orb_id_t;
*/
#define ORB_ID(_name) &__orb_##_name
/**
* Generates a pointer to the uORB metadata structure for
* a given topic.
*
* The topic must have been declared previously in scope
* with ORB_DECLARE().
*
* @param _name The name of the topic.
* @param _count The class ID of the topic
*/
#define ORB_ID_DOUBLE(_name, _count) ((_count == CLASS_DEVICE_PRIMARY) ? &__orb_##_name##0 : &__orb_##_name##1)
/**
* Generates a pointer to the uORB metadata structure for
* a given topic.
*
* The topic must have been declared previously in scope
* with ORB_DECLARE().
*
* @param _name The name of the topic.
* @param _count The class ID of the topic
*/
#define ORB_ID_TRIPLE(_name, _count) \
((_count == CLASS_DEVICE_PRIMARY) ? &__orb_##_name##0 : \
((_count == CLASS_DEVICE_SECONDARY) ? &__orb_##_name##1 : \
(((_count == CLASS_DEVICE_TERTIARY) ? &__orb_##_name##2 : 0))))
/**
* Declare (prototype) the uORB metadata for a topic.
*