dult_multi_user_cb_register()

int dult_multi_user_cb_register	(	const struct dult_user *	user,
		const struct dult_multi_user_cb *	cb )

#include <include/dult/multi_user.h>

Register the DULT multi-user coexistence callbacks for a user.

This function must be called after dult_user_register. The callback structure must remain valid while the user is registered: it is preserved across dult_reset and cleared by dult_user_unregister.

The callbacks are invoked from the system workqueue, decoupled from the dult_enable / dult_reset call that caused the transition. Transitions are delivered in order, but when they are produced faster than the workqueue drains them (repeated dult_enable / dult_reset within a single execution context without yielding) cancelling transitions may be dropped, so intermediate states can be lost. Driving the DULT user lifecycle (registering, unregistering, enabling or resetting a user) from within the callback is allowed.

Parameters

user	User structure used to authenticate the user.
cb	Multi-user callback structure.

Returns

0 if the operation was successful. Otherwise, a (negative) error code is returned.