2014-05-15 01:15:30 +02:00
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "sd-bus.h"
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2015-10-24 22:58:24 +02:00
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2015-10-27 03:01:06 +01:00
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#include "alloc-util.h"
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2014-05-15 01:15:30 +02:00
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#include "bus-control.h"
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#include "bus-objects.h"
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#include "bus-slot.h"
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2015-11-16 22:09:36 +01:00
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#include "string-util.h"
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2014-05-15 01:15:30 +02:00
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sd_bus_slot *bus_slot_allocate(
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sd_bus *bus,
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bool floating,
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BusSlotType type,
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size_t extra,
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void *userdata) {
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sd_bus_slot *slot;
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assert(bus);
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slot = malloc0(offsetof(sd_bus_slot, reply_callback) + extra);
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if (!slot)
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return NULL;
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slot->n_ref = 1;
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slot->type = type;
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slot->bus = bus;
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slot->floating = floating;
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slot->userdata = userdata;
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if (!floating)
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sd_bus_ref(bus);
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LIST_PREPEND(slots, bus->slots, slot);
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return slot;
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}
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_public_ sd_bus_slot* sd_bus_slot_ref(sd_bus_slot *slot) {
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tree-wide: expose "p"-suffix unref calls in public APIs to make gcc cleanup easy
GLIB has recently started to officially support the gcc cleanup
attribute in its public API, hence let's do the same for our APIs.
With this patch we'll define an xyz_unrefp() call for each public
xyz_unref() call, to make it easy to use inside a
__attribute__((cleanup())) expression. Then, all code is ported over to
make use of this.
The new calls are also documented in the man pages, with examples how to
use them (well, I only added docs where the _unref() call itself already
had docs, and the examples, only cover sd_bus_unrefp() and
sd_event_unrefp()).
This also renames sd_lldp_free() to sd_lldp_unref(), since that's how we
tend to call our destructors these days.
Note that this defines no public macro that wraps gcc's attribute and
makes it easier to use. While I think it's our duty in the library to
make our stuff easy to use, I figure it's not our duty to make gcc's own
features easy to use on its own. Most likely, client code which wants to
make use of this should define its own:
#define _cleanup_(function) __attribute__((cleanup(function)))
Or similar, to make the gcc feature easier to use.
Making this logic public has the benefit that we can remove three header
files whose only purpose was to define these functions internally.
See #2008.
2015-11-27 19:13:45 +01:00
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if (!slot)
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return NULL;
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2014-05-15 01:15:30 +02:00
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assert(slot->n_ref > 0);
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slot->n_ref++;
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return slot;
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}
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void bus_slot_disconnect(sd_bus_slot *slot) {
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sd_bus *bus;
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assert(slot);
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2014-05-15 01:55:18 +02:00
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if (!slot->bus)
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2014-05-15 01:15:30 +02:00
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return;
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2014-05-15 01:55:18 +02:00
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switch (slot->type) {
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2014-05-15 01:15:30 +02:00
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case BUS_REPLY_CALLBACK:
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if (slot->reply_callback.cookie != 0)
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2014-10-14 18:27:55 +02:00
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ordered_hashmap_remove(slot->bus->reply_callbacks, &slot->reply_callback.cookie);
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2014-05-15 01:15:30 +02:00
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if (slot->reply_callback.timeout != 0)
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prioq_remove(slot->bus->reply_callbacks_prioq, &slot->reply_callback, &slot->reply_callback.prioq_idx);
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break;
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case BUS_FILTER_CALLBACK:
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slot->bus->filter_callbacks_modified = true;
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LIST_REMOVE(callbacks, slot->bus->filter_callbacks, &slot->filter_callback);
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break;
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case BUS_MATCH_CALLBACK:
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2015-06-17 11:42:39 +02:00
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if (slot->match_added)
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2014-05-15 01:15:30 +02:00
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bus_remove_match_internal(slot->bus, slot->match_callback.match_string, slot->match_callback.cookie);
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slot->bus->match_callbacks_modified = true;
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bus_match_remove(&slot->bus->match_callbacks, &slot->match_callback);
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free(slot->match_callback.match_string);
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break;
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case BUS_NODE_CALLBACK:
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if (slot->node_callback.node) {
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LIST_REMOVE(callbacks, slot->node_callback.node->callbacks, &slot->node_callback);
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slot->bus->nodes_modified = true;
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bus_node_gc(slot->bus, slot->node_callback.node);
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}
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break;
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case BUS_NODE_ENUMERATOR:
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if (slot->node_enumerator.node) {
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LIST_REMOVE(enumerators, slot->node_enumerator.node->enumerators, &slot->node_enumerator);
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slot->bus->nodes_modified = true;
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bus_node_gc(slot->bus, slot->node_enumerator.node);
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}
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break;
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case BUS_NODE_OBJECT_MANAGER:
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if (slot->node_object_manager.node) {
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LIST_REMOVE(object_managers, slot->node_object_manager.node->object_managers, &slot->node_object_manager);
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slot->bus->nodes_modified = true;
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bus_node_gc(slot->bus, slot->node_object_manager.node);
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}
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break;
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case BUS_NODE_VTABLE:
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if (slot->node_vtable.node && slot->node_vtable.interface && slot->node_vtable.vtable) {
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const sd_bus_vtable *v;
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for (v = slot->node_vtable.vtable; v->type != _SD_BUS_VTABLE_END; v++) {
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struct vtable_member *x = NULL;
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switch (v->type) {
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case _SD_BUS_VTABLE_METHOD: {
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struct vtable_member key;
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key.path = slot->node_vtable.node->path;
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key.interface = slot->node_vtable.interface;
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key.member = v->x.method.member;
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x = hashmap_remove(slot->bus->vtable_methods, &key);
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break;
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}
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case _SD_BUS_VTABLE_PROPERTY:
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case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
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struct vtable_member key;
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key.path = slot->node_vtable.node->path;
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key.interface = slot->node_vtable.interface;
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key.member = v->x.method.member;
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x = hashmap_remove(slot->bus->vtable_properties, &key);
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break;
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}}
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free(x);
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}
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}
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free(slot->node_vtable.interface);
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if (slot->node_vtable.node) {
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LIST_REMOVE(vtables, slot->node_vtable.node->vtables, &slot->node_vtable);
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slot->bus->nodes_modified = true;
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bus_node_gc(slot->bus, slot->node_vtable.node);
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}
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break;
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2014-05-15 01:55:18 +02:00
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default:
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assert_not_reached("Wut? Unknown slot type?");
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2014-05-15 01:15:30 +02:00
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}
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2014-05-15 01:55:18 +02:00
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2014-05-15 01:15:30 +02:00
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bus = slot->bus;
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2014-05-15 01:55:18 +02:00
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slot->type = _BUS_SLOT_INVALID;
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2014-05-15 01:15:30 +02:00
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slot->bus = NULL;
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LIST_REMOVE(slots, bus->slots, slot);
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if (!slot->floating)
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sd_bus_unref(bus);
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}
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_public_ sd_bus_slot* sd_bus_slot_unref(sd_bus_slot *slot) {
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if (!slot)
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return NULL;
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assert(slot->n_ref > 0);
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if (slot->n_ref > 1) {
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2016-02-23 05:32:04 +01:00
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slot->n_ref--;
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2014-05-15 01:15:30 +02:00
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return NULL;
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}
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bus_slot_disconnect(slot);
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2014-11-04 16:57:38 +01:00
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free(slot->description);
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2016-10-17 00:28:30 +02:00
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return mfree(slot);
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2014-05-15 01:15:30 +02:00
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}
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_public_ sd_bus* sd_bus_slot_get_bus(sd_bus_slot *slot) {
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assert_return(slot, NULL);
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return slot->bus;
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}
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_public_ void *sd_bus_slot_get_userdata(sd_bus_slot *slot) {
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assert_return(slot, NULL);
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return slot->userdata;
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}
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_public_ void *sd_bus_slot_set_userdata(sd_bus_slot *slot, void *userdata) {
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void *ret;
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assert_return(slot, NULL);
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ret = slot->userdata;
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slot->userdata = userdata;
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return ret;
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}
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_public_ sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot) {
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assert_return(slot, NULL);
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2014-05-15 01:55:18 +02:00
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assert_return(slot->type >= 0, NULL);
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2014-05-15 01:15:30 +02:00
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if (slot->bus->current_slot != slot)
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return NULL;
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return slot->bus->current_message;
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}
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2014-08-18 17:41:56 +02:00
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_public_ sd_bus_message_handler_t sd_bus_slot_get_current_handler(sd_bus_slot *slot) {
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assert_return(slot, NULL);
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assert_return(slot->type >= 0, NULL);
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if (slot->bus->current_slot != slot)
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return NULL;
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return slot->bus->current_handler;
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}
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_public_ void* sd_bus_slot_get_current_userdata(sd_bus_slot *slot) {
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assert_return(slot, NULL);
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assert_return(slot->type >= 0, NULL);
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if (slot->bus->current_slot != slot)
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return NULL;
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return slot->bus->current_userdata;
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}
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2014-11-04 16:57:38 +01:00
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_public_ int sd_bus_slot_set_description(sd_bus_slot *slot, const char *description) {
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assert_return(slot, -EINVAL);
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return free_and_strdup(&slot->description, description);
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}
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2015-07-09 10:40:41 +02:00
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_public_ int sd_bus_slot_get_description(sd_bus_slot *slot, const char **description) {
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2014-11-04 16:57:38 +01:00
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assert_return(slot, -EINVAL);
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assert_return(description, -EINVAL);
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assert_return(slot->description, -ENXIO);
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*description = slot->description;
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return 0;
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}
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