libsystemd/sd-bus/bus-slot.c

	bus-slot.c revision 9cbfc66c621c42aa6e58e9e0da0adfb01efa7537
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen/***
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  This file is part of systemd.
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  Copyright 2013 Lennart Poettering
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  systemd is free software; you can redistribute it and/or modify it
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  under the terms of the GNU Lesser General Public License as published by
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  the Free Software Foundation; either version 2.1 of the License, or
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  (at your option) any later version.
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  systemd is distributed in the hope that it will be useful, but
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  WITHOUT ANY WARRANTY; without even the implied warranty of
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  Lesser General Public License for more details.
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  You should have received a copy of the GNU Lesser General Public License
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen  along with systemd; If not, see <http://www.gnu.org/licenses/>.
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen***/
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen#include "sd-bus.h"
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen#include "bus-control.h"
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen#include "bus-objects.h"
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen#include "bus-slot.h"
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poetteringsd_bus_slot *bus_slot_allocate(
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering                sd_bus *bus,
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering                bool floating,
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                BusSlotType type,
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                size_t extra,
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                void *userdata) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering        sd_bus_slot *slot;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert(bus);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot = malloc0(offsetof(sd_bus_slot, reply_callback) + extra);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (!slot)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                return NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->n_ref = 1;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->type = type;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->bus = bus;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->floating = floating;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->userdata = userdata;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (!floating)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                sd_bus_ref(bus);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        LIST_PREPEND(slots, bus->slots, slot);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return slot;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ sd_bus_slot* sd_bus_slot_ref(sd_bus_slot *slot) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert(slot->n_ref > 0);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->n_ref++;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return slot;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersenvoid bus_slot_disconnect(sd_bus_slot *slot) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        sd_bus *bus;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert(slot);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (!slot->bus)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                return;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        switch (slot->type) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        case BUS_REPLY_CALLBACK:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                if (slot->reply_callback.cookie != 0)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        ordered_hashmap_remove(slot->bus->reply_callbacks, &slot->reply_callback.cookie);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                if (slot->reply_callback.timeout != 0)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        prioq_remove(slot->bus->reply_callbacks_prioq, &slot->reply_callback, &slot->reply_callback.prioq_idx);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        case BUS_FILTER_CALLBACK:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                slot->bus->filter_callbacks_modified = true;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                LIST_REMOVE(callbacks, slot->bus->filter_callbacks, &slot->filter_callback);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        case BUS_MATCH_CALLBACK:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                if (slot->bus->bus_client)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        bus_remove_match_internal(slot->bus, slot->match_callback.match_string, slot->match_callback.cookie);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                slot->bus->match_callbacks_modified = true;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                bus_match_remove(&slot->bus->match_callbacks, &slot->match_callback);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                free(slot->match_callback.match_string);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        case BUS_NODE_CALLBACK:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                if (slot->node_callback.node) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        LIST_REMOVE(callbacks, slot->node_callback.node->callbacks, &slot->node_callback);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        slot->bus->nodes_modified = true;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        bus_node_gc(slot->bus, slot->node_callback.node);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        case BUS_NODE_ENUMERATOR:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                if (slot->node_enumerator.node) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        LIST_REMOVE(enumerators, slot->node_enumerator.node->enumerators, &slot->node_enumerator);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        slot->bus->nodes_modified = true;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        bus_node_gc(slot->bus, slot->node_enumerator.node);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        case BUS_NODE_OBJECT_MANAGER:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                if (slot->node_object_manager.node) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        LIST_REMOVE(object_managers, slot->node_object_manager.node->object_managers, &slot->node_object_manager);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        slot->bus->nodes_modified = true;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        bus_node_gc(slot->bus, slot->node_object_manager.node);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        case BUS_NODE_VTABLE:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                if (slot->node_vtable.node && slot->node_vtable.interface && slot->node_vtable.vtable) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        const sd_bus_vtable *v;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        for (v = slot->node_vtable.vtable; v->type != _SD_BUS_VTABLE_END; v++) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                struct vtable_member *x = NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                switch (v->type) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                case _SD_BUS_VTABLE_METHOD: {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        struct vtable_member key;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        key.path = slot->node_vtable.node->path;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        key.interface = slot->node_vtable.interface;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        key.member = v->x.method.member;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        x = hashmap_remove(slot->bus->vtable_methods, &key);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                case _SD_BUS_VTABLE_PROPERTY:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        struct vtable_member key;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        key.path = slot->node_vtable.node->path;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        key.interface = slot->node_vtable.interface;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        key.member = v->x.method.member;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        x = hashmap_remove(slot->bus->vtable_properties, &key);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                        break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                }}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                                free(x);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                free(slot->node_vtable.interface);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                if (slot->node_vtable.node) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        LIST_REMOVE(vtables, slot->node_vtable.node->vtables, &slot->node_vtable);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        slot->bus->nodes_modified = true;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                        bus_node_gc(slot->bus, slot->node_vtable.node);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
2237aa02f3e2739a1ebe9c0bc224b5125f5eb292David Herrmann                break;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        default:
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                assert_not_reached("Wut? Unknown slot type?");
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        bus = slot->bus;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->type = _BUS_SLOT_INVALID;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->bus = NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        LIST_REMOVE(slots, bus->slots, slot);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (!slot->floating)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                sd_bus_unref(bus);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ sd_bus_slot* sd_bus_slot_unref(sd_bus_slot *slot) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (!slot)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                return NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert(slot->n_ref > 0);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (slot->n_ref > 1) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                slot->n_ref --;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                return NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        }
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        bus_slot_disconnect(slot);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        free(slot->description);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        free(slot);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ sd_bus* sd_bus_slot_get_bus(sd_bus_slot *slot) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return slot->bus;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ void *sd_bus_slot_get_userdata(sd_bus_slot *slot) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return slot->userdata;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ void *sd_bus_slot_set_userdata(sd_bus_slot *slot, void *userdata) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        void *ret;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        ret = slot->userdata;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        slot->userdata = userdata;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return ret;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot->type >= 0, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (slot->bus->current_slot != slot)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                return NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return slot->bus->current_message;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ sd_bus_message_handler_t sd_bus_slot_get_current_handler(sd_bus_slot *slot) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot->type >= 0, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (slot->bus->current_slot != slot)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                return NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return slot->bus->current_handler;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ void* sd_bus_slot_get_current_userdata(sd_bus_slot *slot) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot->type >= 0, NULL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        if (slot->bus->current_slot != slot)
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen                return NULL;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return slot->bus->current_userdata;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ int sd_bus_slot_set_description(sd_bus_slot *slot, const char *description) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, -EINVAL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return free_and_strdup(&slot->description, description);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen_public_ int sd_bus_slot_get_description(sd_bus_slot *slot, char **description) {
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot, -EINVAL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(description, -EINVAL);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        assert_return(slot->description, -ENXIO);
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        *description = slot->description;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen        return 0;
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen}
e3dca0089b7b50e2ec21409d1292727921d06102Tom Gundersen