/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2011 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <assert.h> #include <string.h> #include "util.h" #include "logind-device.h" Device* device_new(Manager *m, const char *sysfs, bool master) { Device *d; assert(m); assert(sysfs); d = new0(Device, 1); if (!d) return NULL; d->sysfs = strdup(sysfs); if (!d->sysfs) { free(d); return NULL; } if (hashmap_put(m->devices, d->sysfs, d) < 0) { free(d->sysfs); free(d); return NULL; } d->manager = m; d->master = master; dual_timestamp_get(&d->timestamp); return d; } void device_free(Device *d) { assert(d); device_detach(d); hashmap_remove(d->manager->devices, d->sysfs); free(d->sysfs); free(d); } void device_detach(Device *d) { Seat *s; SessionDevice *sd; assert(d); if (!d->seat) return; while ((sd = d->session_devices)) session_device_free(sd); s = d->seat; LIST_REMOVE(devices, d->seat->devices, d); d->seat = NULL; if (!seat_has_master_device(s)) { seat_add_to_gc_queue(s); seat_send_changed(s, "CanGraphical", NULL); } } void device_attach(Device *d, Seat *s) { Device *i; bool had_master; assert(d); assert(s); if (d->seat == s) return; if (d->seat) device_detach(d); d->seat = s; had_master = seat_has_master_device(s); /* We keep the device list sorted by the "master" flag. That is, master * devices are at the front, other devices at the tail. As there is no * way to easily add devices at the list-tail, we need to iterate the * list to find the first non-master device when adding non-master * devices. We assume there is only a few (normally 1) master devices * per seat, so we iterate only a few times. */ if (d->master || !s->devices) LIST_PREPEND(devices, s->devices, d); else { LIST_FOREACH(devices, i, s->devices) { if (!i->devices_next || !i->master) { LIST_INSERT_AFTER(devices, s->devices, i, d); break; } } } if (!had_master && d->master) seat_send_changed(s, "CanGraphical", NULL); }