b2068772f5
This introduces a new SYSVIEW_EVENT_SETTLE notification that is sent after initial scanning via sysview is done. This is very handy to let the application raise warnings in case requested resources are not found during startup. The SETTLE event is sent after systemd-logind and udev enumerations are done. This event does in no way guarantee that a given resource is available. All it does is notify the application that scanning is done! You must not react to SETTLE if you don't have external synchronization with the resource you're waiting for. The main use-case for SETTLE is to run applications _inside_ of logind sessions and startup sysview. You really want to make sure that the own session you're running in was found during enumeration. If not, something is seriously wrong.
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
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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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#pragma once
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#include <inttypes.h>
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#include <libudev.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <systemd/sd-bus.h>
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#include <systemd/sd-event.h>
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#include "hashmap.h"
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#include "list.h"
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#include "macro.h"
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#include "sysview.h"
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#include "util.h"
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/*
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* Devices
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*/
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struct sysview_device {
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sysview_seat *seat;
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char *name;
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unsigned int type;
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union {
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struct {
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struct udev_device *ud;
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} evdev, drm;
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};
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};
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sysview_device *sysview_find_device(sysview_context *c, const char *name);
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int sysview_device_new(sysview_device **out, sysview_seat *seat, const char *name);
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sysview_device *sysview_device_free(sysview_device *device);
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DEFINE_TRIVIAL_CLEANUP_FUNC(sysview_device*, sysview_device_free);
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/*
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* Sessions
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*/
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struct sysview_session {
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sysview_seat *seat;
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char *name;
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char *path;
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void *userdata;
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sd_bus_slot *slot_take_control;
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bool custom : 1;
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bool public : 1;
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bool wants_control : 1;
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bool has_control : 1;
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};
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sysview_session *sysview_find_session(sysview_context *c, const char *name);
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int sysview_session_new(sysview_session **out, sysview_seat *seat, const char *name);
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sysview_session *sysview_session_free(sysview_session *session);
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DEFINE_TRIVIAL_CLEANUP_FUNC(sysview_session*, sysview_session_free);
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/*
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* Seats
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*/
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struct sysview_seat {
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sysview_context *context;
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char *name;
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char *path;
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Hashmap *session_map;
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Hashmap *device_map;
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bool scanned : 1;
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bool public : 1;
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};
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sysview_seat *sysview_find_seat(sysview_context *c, const char *name);
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int sysview_seat_new(sysview_seat **out, sysview_context *c, const char *name);
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sysview_seat *sysview_seat_free(sysview_seat *seat);
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DEFINE_TRIVIAL_CLEANUP_FUNC(sysview_seat*, sysview_seat_free);
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/*
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* Contexts
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*/
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struct sysview_context {
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sd_event *event;
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sd_bus *sysbus;
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struct udev *ud;
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uint64_t custom_sid;
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unsigned int n_probe;
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Hashmap *seat_map;
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Hashmap *session_map;
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Hashmap *device_map;
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sd_event_source *scan_src;
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sysview_event_fn event_fn;
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void *userdata;
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/* udev scanner */
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struct udev_monitor *ud_monitor;
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sd_event_source *ud_monitor_src;
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/* logind scanner */
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sd_bus_slot *ld_slot_manager_signal;
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sd_bus_slot *ld_slot_list_seats;
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sd_bus_slot *ld_slot_list_sessions;
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bool scan_logind : 1;
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bool scan_evdev : 1;
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bool scan_drm : 1;
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bool running : 1;
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bool scanned : 1;
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bool rescan : 1;
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bool settled : 1;
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};
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int sysview_context_rescan(sysview_context *c);
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