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uORB: Provide used group count

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This commit is contained in:
Lorenz Meier 2015-08-30 00:12:33 +02:00
parent c5489b0598
commit fbe5ef6087
2 changed files with 22 additions and 0 deletions
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14
src/modules/uORB/uORB.cpp
View File

@ -260,6 +260,20 @@ int orb_exists(const struct orb_metadata *meta, int instance)
return uORB::Manager::get_instance()->orb_exists(meta, instance);
}
/**
* Get the number of published instances of a topic group
*
* @param meta ORB topic metadata.
* @return The number of published instances of this topic
*/
int orb_group_count(const struct orb_metadata *meta)
{
unsigned group_count = 0;
while (!uORB::Manager::get_instance()->orb_exists(meta, group_count++)) {};
return group_count;
}
/**
* Return the priority of the topic
*

8
src/modules/uORB/uORB.h
View File

@ -328,6 +328,14 @@ extern int orb_stat(int handle, uint64_t *time) __EXPORT;
*/
extern int orb_exists(const struct orb_metadata *meta, int instance) __EXPORT;
/**
* Get the number of published instances of a topic group
*
* @param meta ORB topic metadata.
* @return The number of published instances of this topic
*/
extern int orb_group_count(const struct orb_metadata *meta) __EXPORT;
/**
* Return the priority of the topic
*