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bluetooth: host: Rename bt_conn_get_id and make it public.

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There is not an easy way to relate an application's user_data to a
connection. One way is to save a pointer to bt_conn in the
application's user_data array upon connection establishment.
Each connection related callback function will have to loop for all
user_data and compare the saved pointer to the passed bt_conn
pointer. This is inefficient if there are many callback activations
during the connection.

This change makes the internal bt_conn mapping function accessible to
applications in conn.h. The function name is changed to
bt_conn_index() to clearly indicate that the function returns an
index of an array.
Add an ASSERT to catch illegal parameter.

Signed-off-by: Kim Sekkelund <ksek@oticon.com>
This commit is contained in:
Kim Sekkelund 2018-11-26 09:10:06 +01:00 • committed by Johan Hedberg
commit bf11698ed9
5 changed files with 22 additions and 7 deletions
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12
include/bluetooth/conn.h
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@ -100,6 +100,18 @@ struct bt_conn *bt_conn_lookup_addr_le(u8_t id, const bt_addr_le_t *peer);
*/
const bt_addr_le_t *bt_conn_get_dst(const struct bt_conn *conn);
/** @brief Get array index of a connection
*
* This function is used to map bt_conn to index of an array of
* connections. The array has CONFIG_BT_MAX_CONN elements.
*
* @param conn Connection object.
*
* @return Index of the connection object.
* The range of the returned value is 0..CONFIG_BT_MAX_CONN-1
*/
u8_t bt_conn_index(struct bt_conn *conn);
/** Connection Type */
enum {
/** LE Connection Type */