Function rcl_get_service_names_and_types_by_node

Function Documentation

rcl_ret_t rcl_get_service_names_and_types_by_node(const rcl_node_t *node, rcl_allocator_t *allocator, const char *node_name, const char *node_namespace, rcl_names_and_types_t *service_names_and_types)

Return a list of service names and types associated with a node.

The node parameter must point to a valid node.

The service_names_and_types parameter must be allocated and zero initialized. This function allocates memory for the returned list of names and types and so it is the callers responsibility to pass service_names_and_types to rcl_names_and_types_fini() when it is no longer needed. Failing to do so will result in leaked memory.

The returned names are not automatically remapped by this function. Attempting to create service clients using names returned by this function may not result in the desired service name being used depending on the remap rules in use.

See also

rcl_get_publisher_names_and_types_by_node for details on the no_demangle parameter.

Attribute

Adherence

Allocates Memory

Yes

Thread-Safe

No

Uses Atomics

No

Lock-Free

Maybe [1]

[1] implementation may need to protect the data structure with a lock

Parameters:

  • node – [in] the handle to the node being used to query the ROS graph

  • allocator – [in] allocator to be used when allocating space for strings

  • node_name – [in] the node name of the services to return

  • node_namespace – [in] the node namespace of the services to return

  • service_names_and_types – [out] list of service names and their types

Returns:

RCL_RET_OK if the query was successful, or

Returns:

RCL_RET_NODE_INVALID if the node is invalid, or

Returns:

RCL_RET_INVALID_ARGUMENT if any arguments are invalid, or

Returns:

RCL_RET_NODE_INVALID_NAME if the node name is invalid, or

Returns:

RCL_RET_NODE_INVALID_NAMESPACE if the node namespace is invalid, or

Returns:

RCL_RET_NODE_NAME_NON_EXISTENT if the node name wasn’t found, or

Returns:

RCL_RET_ERROR if an unspecified error occurs.