Function cap_alloc

kernel/generic/src/cap/cap.c:265–287

Allocate new capability * * @param task Task for which to allocate the new capability. * * @param[out] handle New capability handle on success. * * @return An error code in case of error. */

 * @return An error code in case of error.
 */
errno_t cap_alloc(task_t *task, cap_handle_t *handle)
{
	mutex_lock(&task->cap_info->lock);
	cap_t *cap = slab_alloc(cap_cache, FRAME_ATOMIC);
	if (!cap) {
		mutex_unlock(&task->cap_info->lock);
		return ENOMEM;
	}
	uintptr_t hbase;
	if (!ra_alloc(task->cap_info->handles, 1, 1, &hbase)) {
		slab_free(cap_cache, cap);
		mutex_unlock(&task->cap_info->lock);
		return ENOMEM;
	}
	cap_initialize(cap, task, (cap_handle_t) hbase);
	hash_table_insert(&task->cap_info->caps, &cap->caps_link);

	cap->state = CAP_STATE_ALLOCATED;
	*handle = cap->handle;
	mutex_unlock(&task->cap_info->lock);

	return EOK;
}

/** Publish allocated capability
 *