src/libinput.c

   1 /*
   2  * Copyright © 2013 Jonas Ådahl
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the copyright holders not be used in
   9  * advertising or publicity pertaining to distribution of the software
  10  * without specific, written prior permission.  The copyright holders make
  11  * no representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  15  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  17  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  18  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  19  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <errno.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <sys/epoll.h>
  30 #include <unistd.h>
  31 #include <assert.h>
  32
  33 #include "libinput.h"
  34 #include "libinput-private.h"
  35 #include "evdev.h"
  36 #include "udev-seat.h"
  37
  38 enum libinput_event_class {
  39         LIBINPUT_EVENT_CLASS_BASE,
  40         LIBINPUT_EVENT_CLASS_SEAT,
  41         LIBINPUT_EVENT_CLASS_DEVICE,
  42 };
  43
  44 struct libinput_source {
  45         libinput_source_dispatch_t dispatch;
  46         void *user_data;
  47         int fd;
  48         struct list link;
  49 };
  50
  51 struct libinput_event {
  52         enum libinput_event_type type;
  53         union libinput_event_target target;
  54 };
  55
  56 struct libinput_event_added_seat {
  57         struct libinput_event base;
  58         struct libinput_seat *seat;
  59 };
  60
  61 struct libinput_event_removed_seat {
  62         struct libinput_event base;
  63         struct libinput_seat *seat;
  64 };
  65
  66 struct libinput_event_added_device {
  67         struct libinput_event base;
  68         struct libinput_device *device;
  69 };
  70
  71 struct libinput_event_removed_device {
  72         struct libinput_event base;
  73         struct libinput_device *device;
  74 };
  75
  76 struct libinput_event_device_register_capability {
  77         struct libinput_event base;
  78         enum libinput_device_capability capability;
  79 };
  80
  81 struct libinput_event_device_unregister_capability {
  82         struct libinput_event base;
  83         enum libinput_device_capability capability;
  84 };
  85
  86 struct libinput_event_keyboard_key {
  87         struct libinput_event base;
  88         uint32_t time;
  89         uint32_t key;
  90         enum libinput_keyboard_key_state state;
  91 };
  92
  93 struct libinput_event_pointer_motion {
  94         struct libinput_event base;
  95         uint32_t time;
  96         li_fixed_t dx;
  97         li_fixed_t dy;
  98 };
  99
 100 struct libinput_event_pointer_motion_absolute {
 101         struct libinput_event base;
 102         uint32_t time;
 103         li_fixed_t x;
 104         li_fixed_t y;
 105 };
 106
 107 struct libinput_event_pointer_button {
 108         struct libinput_event base;
 109         uint32_t time;
 110         uint32_t button;
 111         enum libinput_pointer_button_state state;
 112 };
 113
 114 struct libinput_event_pointer_axis {
 115         struct libinput_event base;
 116         uint32_t time;
 117         enum libinput_pointer_axis axis;
 118         li_fixed_t value;
 119 };
 120
 121 struct libinput_event_touch_touch {
 122         struct libinput_event base;
 123         uint32_t time;
 124         uint32_t slot;
 125         li_fixed_t x;
 126         li_fixed_t y;
 127         enum libinput_touch_type touch_type;
 128 };
 129
 130 static void
 131 libinput_post_event(struct libinput *libinput,
 132                     struct libinput_event *event);
 133
 134 LIBINPUT_EXPORT enum libinput_event_type
 135 libinput_event_get_type(struct libinput_event *event)
 136 {
 137         return event->type;
 138 }
 139
 140 LIBINPUT_EXPORT union libinput_event_target
 141 libinput_event_get_target(struct libinput_event *event)
 142 {
 143         return event->target;
 144 }
 145
 146 LIBINPUT_EXPORT struct libinput_seat *
 147 libinput_event_added_seat_get_seat(struct libinput_event_added_seat *event)
 148 {
 149         return event->seat;
 150 }
 151
 152 LIBINPUT_EXPORT struct libinput_seat *
 153 libinput_event_removed_seat_get_seat(struct libinput_event_removed_seat *event)
 154 {
 155         return event->seat;
 156 }
 157
 158 LIBINPUT_EXPORT struct libinput_device *
 159 libinput_event_added_device_get_device(
 160         struct libinput_event_added_device *event)
 161 {
 162         return event->device;
 163 }
 164
 165 LIBINPUT_EXPORT struct libinput_device *
 166 libinput_event_removed_device_get_device(
 167         struct libinput_event_removed_device *event)
 168 {
 169         return event->device;
 170 }
 171
 172 LIBINPUT_EXPORT enum libinput_device_capability
 173 libinput_event_device_register_capability_get_capability(
 174         struct libinput_event_device_register_capability *event)
 175 {
 176         return event->capability;
 177 }
 178
 179 LIBINPUT_EXPORT enum libinput_device_capability
 180 libinput_event_device_unregister_capability_get_capability(
 181         struct libinput_event_device_unregister_capability *event)
 182 {
 183         return event->capability;
 184 }
 185
 186 LIBINPUT_EXPORT uint32_t
 187 libinput_event_keyboard_key_get_time(
 188         struct libinput_event_keyboard_key *event)
 189 {
 190         return event->time;
 191 }
 192
 193 LIBINPUT_EXPORT uint32_t
 194 libinput_event_keyboard_key_get_key(
 195         struct libinput_event_keyboard_key *event)
 196 {
 197         return event->key;
 198 }
 199
 200 LIBINPUT_EXPORT enum libinput_keyboard_key_state
 201 libinput_event_keyboard_key_get_state(
 202         struct libinput_event_keyboard_key *event)
 203 {
 204         return event->state;
 205 }
 206
 207 LIBINPUT_EXPORT uint32_t
 208 libinput_event_pointer_motion_get_time(
 209         struct libinput_event_pointer_motion *event)
 210 {
 211         return event->time;
 212 }
 213
 214 LIBINPUT_EXPORT li_fixed_t
 215 libinput_event_pointer_motion_get_dx(
 216         struct libinput_event_pointer_motion *event)
 217 {
 218         return event->dx;
 219 }
 220
 221 LIBINPUT_EXPORT li_fixed_t
 222 libinput_event_pointer_motion_get_dy(
 223         struct libinput_event_pointer_motion *event)
 224 {
 225         return event->dy;
 226 }
 227
 228 LIBINPUT_EXPORT uint32_t
 229 libinput_event_pointer_motion_absolute_get_time(
 230         struct libinput_event_pointer_motion_absolute *event)
 231 {
 232         return event->time;
 233 }
 234
 235 LIBINPUT_EXPORT li_fixed_t
 236 libinput_event_pointer_motion_absolute_get_x(
 237         struct libinput_event_pointer_motion_absolute *event)
 238 {
 239         return event->x;
 240 }
 241
 242 LIBINPUT_EXPORT li_fixed_t
 243 libinput_event_pointer_motion_absolute_get_y(
 244         struct libinput_event_pointer_motion_absolute *event)
 245 {
 246         return event->y;
 247 }
 248
 249 LIBINPUT_EXPORT uint32_t
 250 libinput_event_pointer_button_get_time(
 251         struct libinput_event_pointer_button *event)
 252 {
 253         return event->time;
 254 }
 255
 256 LIBINPUT_EXPORT uint32_t
 257 libinput_event_pointer_button_get_button(
 258         struct libinput_event_pointer_button *event)
 259 {
 260         return event->button;
 261 }
 262
 263 LIBINPUT_EXPORT enum libinput_pointer_button_state
 264 libinput_event_pointer_button_get_state(
 265         struct libinput_event_pointer_button *event)
 266 {
 267         return event->state;
 268 }
 269
 270 LIBINPUT_EXPORT uint32_t
 271 libinput_event_pointer_axis_get_time(
 272         struct libinput_event_pointer_axis *event)
 273 {
 274         return event->time;
 275 }
 276
 277 LIBINPUT_EXPORT enum libinput_pointer_axis
 278 libinput_event_pointer_axis_get_axis(
 279         struct libinput_event_pointer_axis *event)
 280 {
 281         return event->axis;
 282 }
 283
 284 LIBINPUT_EXPORT li_fixed_t
 285 libinput_event_pointer_axis_get_value(
 286         struct libinput_event_pointer_axis *event)
 287 {
 288         return event->value;
 289 }
 290
 291 LIBINPUT_EXPORT uint32_t
 292 libinput_event_touch_touch_get_time(
 293         struct libinput_event_touch_touch *event)
 294 {
 295         return event->time;
 296 }
 297
 298 LIBINPUT_EXPORT uint32_t
 299 libinput_event_touch_touch_get_slot(
 300         struct libinput_event_touch_touch *event)
 301 {
 302         return event->slot;
 303 }
 304
 305 LIBINPUT_EXPORT li_fixed_t
 306 libinput_event_touch_touch_get_x(
 307         struct libinput_event_touch_touch *event)
 308 {
 309         return event->x;
 310 }
 311
 312 LIBINPUT_EXPORT li_fixed_t
 313 libinput_event_touch_touch_get_y(
 314         struct libinput_event_touch_touch *event)
 315 {
 316         return event->y;
 317 }
 318
 319 LIBINPUT_EXPORT enum libinput_touch_type
 320 libinput_event_touch_touch_get_touch_type(
 321         struct libinput_event_touch_touch *event)
 322 {
 323         return event->touch_type;
 324 }
 325
 326 struct libinput_source *
 327 libinput_add_fd(struct libinput *libinput,
 328                 int fd,
 329                 libinput_source_dispatch_t dispatch,
 330                 void *user_data)
 331 {
 332         struct libinput_source *source;
 333         struct epoll_event ep;
 334
 335         source = malloc(sizeof *source);
 336         if (!source)
 337                 return NULL;
 338
 339         source->dispatch = dispatch;
 340         source->user_data = user_data;
 341         source->fd = fd;
 342
 343         memset(&ep, 0, sizeof ep);
 344         ep.events = EPOLLIN;
 345         ep.data.ptr = source;
 346
 347         if (epoll_ctl(libinput->epoll_fd, EPOLL_CTL_ADD, fd, &ep) < 0) {
 348                 close(source->fd);
 349                 free(source);
 350                 return NULL;
 351         }
 352
 353         return source;
 354 }
 355
 356 void
 357 libinput_remove_source(struct libinput *libinput,
 358                        struct libinput_source *source)
 359 {
 360         epoll_ctl(libinput->epoll_fd, EPOLL_CTL_DEL, source->fd, NULL);
 361         close(source->fd);
 362         source->fd = -1;
 363         list_insert(&libinput->source_destroy_list, &source->link);
 364 }
 365
 366 int
 367 libinput_init(struct libinput *libinput,
 368               const struct libinput_interface *interface,
 369               void *user_data)
 370 {
 371         libinput->epoll_fd = epoll_create1(EPOLL_CLOEXEC);;
 372         if (libinput->epoll_fd < 0)
 373                 return -1;
 374
 375         libinput->events_len = 4;
 376         libinput->events = zalloc(libinput->events_len * sizeof(*libinput->events));
 377         if (!libinput->events) {
 378                 close(libinput->epoll_fd);
 379                 return -1;
 380         }
 381
 382         libinput->interface = interface;
 383         libinput->user_data = user_data;
 384         list_init(&libinput->source_destroy_list);
 385         list_init(&libinput->seat_list);
 386
 387         return 0;
 388 }
 389
 390 static void
 391 libinput_device_destroy(struct libinput_device *device);
 392
 393 static void
 394 libinput_seat_destroy(struct libinput_seat *seat);
 395
 396 LIBINPUT_EXPORT void
 397 libinput_destroy(struct libinput *libinput)
 398 {
 399         struct libinput_event *event;
 400         struct libinput_device *device, *next_device;
 401         struct libinput_seat *seat, *next_seat;
 402
 403         while ((event = libinput_get_event(libinput)))
 404                libinput_event_destroy(event);
 405         free(libinput->events);
 406
 407         list_for_each_safe(seat, next_seat, &libinput->seat_list, link) {
 408                 list_for_each_safe(device, next_device,
 409                                    &seat->devices_list,
 410                                    link)
 411                         libinput_device_destroy(device);
 412
 413                 libinput_seat_destroy(seat);
 414         }
 415
 416         close(libinput->epoll_fd);
 417         free(libinput);
 418 }
 419
 420 static enum libinput_event_class
 421 libinput_event_get_class(struct libinput_event *event)
 422 {
 423         switch (event->type) {
 424         case LIBINPUT_EVENT_ADDED_SEAT:
 425         case LIBINPUT_EVENT_REMOVED_SEAT:
 426         case LIBINPUT_EVENT_ADDED_DEVICE:
 427         case LIBINPUT_EVENT_REMOVED_DEVICE:
 428                 return LIBINPUT_EVENT_CLASS_BASE;
 429
 430         case LIBINPUT_EVENT_DEVICE_REGISTER_CAPABILITY:
 431         case LIBINPUT_EVENT_DEVICE_UNREGISTER_CAPABILITY:
 432         case LIBINPUT_EVENT_KEYBOARD_KEY:
 433         case LIBINPUT_EVENT_POINTER_MOTION:
 434         case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
 435         case LIBINPUT_EVENT_POINTER_BUTTON:
 436         case LIBINPUT_EVENT_POINTER_AXIS:
 437         case LIBINPUT_EVENT_TOUCH_TOUCH:
 438                 return LIBINPUT_EVENT_CLASS_DEVICE;
 439         }
 440
 441         /* We should never end up here. */
 442         abort();
 443 }
 444
 445 LIBINPUT_EXPORT void
 446 libinput_event_destroy(struct libinput_event *event)
 447 {
 448         if (event == NULL)
 449                 return;
 450
 451         switch (libinput_event_get_class(event)) {
 452         case LIBINPUT_EVENT_CLASS_BASE:
 453                 break;
 454         case LIBINPUT_EVENT_CLASS_SEAT:
 455                 libinput_seat_unref(event->target.seat);
 456                 break;
 457         case LIBINPUT_EVENT_CLASS_DEVICE:
 458                 libinput_device_unref(event->target.device);
 459                 break;
 460         }
 461
 462         free(event);
 463 }
 464
 465 int
 466 open_restricted(struct libinput *libinput,
 467                 const char *path, int flags)
 468 {
 469         return libinput->interface->open_restricted(path,
 470                                                     flags,
 471                                                     libinput->user_data);
 472 }
 473
 474 void
 475 close_restricted(struct libinput *libinput, int fd)
 476 {
 477         return libinput->interface->close_restricted(fd, libinput->user_data);
 478 }
 479
 480 void
 481 libinput_seat_init(struct libinput_seat *seat,
 482                    struct libinput *libinput,
 483                    const char *name)
 484 {
 485         seat->refcount = 1;
 486         seat->libinput = libinput;
 487         seat->name = strdup(name);
 488         list_init(&seat->devices_list);
 489 }
 490
 491 LIBINPUT_EXPORT void
 492 libinput_seat_ref(struct libinput_seat *seat)
 493 {
 494         seat->refcount++;
 495 }
 496
 497 static void
 498 libinput_seat_destroy(struct libinput_seat *seat)
 499 {
 500         free(seat->name);
 501         udev_seat_destroy((struct udev_seat *) seat);
 502 }
 503
 504 LIBINPUT_EXPORT void
 505 libinput_seat_unref(struct libinput_seat *seat)
 506 {
 507         assert(seat->refcount > 0);
 508         seat->refcount--;
 509         if (seat->refcount == 0)
 510                 libinput_seat_destroy(seat);
 511 }
 512
 513 LIBINPUT_EXPORT void
 514 libinput_seat_set_user_data(struct libinput_seat *seat, void *user_data)
 515 {
 516         seat->user_data = user_data;
 517 }
 518
 519 LIBINPUT_EXPORT void *
 520 libinput_seat_get_user_data(struct libinput_seat *seat)
 521 {
 522         return seat->user_data;
 523 }
 524
 525 LIBINPUT_EXPORT const char *
 526 libinput_seat_get_name(struct libinput_seat *seat)
 527 {
 528         return seat->name;
 529 }
 530
 531 void
 532 libinput_device_init(struct libinput_device *device,
 533                      struct libinput_seat *seat)
 534 {
 535         device->seat = seat;
 536         device->refcount = 1;
 537 }
 538
 539 LIBINPUT_EXPORT void
 540 libinput_device_ref(struct libinput_device *device)
 541 {
 542         device->refcount++;
 543 }
 544
 545 static void
 546 libinput_device_destroy(struct libinput_device *device)
 547 {
 548         evdev_device_destroy((struct evdev_device *) device);
 549 }
 550
 551 LIBINPUT_EXPORT void
 552 libinput_device_unref(struct libinput_device *device)
 553 {
 554         assert(device->refcount > 0);
 555         device->refcount--;
 556         if (device->refcount == 0)
 557                 libinput_device_destroy(device);
 558 }
 559
 560 LIBINPUT_EXPORT int
 561 libinput_get_fd(struct libinput *libinput)
 562 {
 563         return libinput->epoll_fd;
 564 }
 565
 566 LIBINPUT_EXPORT int
 567 libinput_dispatch(struct libinput *libinput)
 568 {
 569         struct libinput_source *source, *next;
 570         struct epoll_event ep[32];
 571         int i, count;
 572
 573         count = epoll_wait(libinput->epoll_fd, ep, ARRAY_LENGTH(ep), 0);
 574         if (count < 0)
 575                 return -errno;
 576
 577         for (i = 0; i < count; ++i) {
 578                 source = ep[i].data.ptr;
 579                 if (source->fd == -1)
 580                         continue;
 581
 582                 source->dispatch(source->user_data);
 583         }
 584
 585         list_for_each_safe(source, next, &libinput->source_destroy_list, link)
 586                 free(source);
 587         list_init(&libinput->source_destroy_list);
 588
 589         return 0;
 590 }
 591
 592 static void
 593 init_event_base(struct libinput_event *event,
 594                 enum libinput_event_type type,
 595                 union libinput_event_target target)
 596 {
 597         event->type = type;
 598         event->target = target;
 599 }
 600
 601 static void
 602 post_base_event(struct libinput *libinput,
 603                 enum libinput_event_type type,
 604                 struct libinput_event *event)
 605 {
 606         init_event_base(event, type,
 607                         (union libinput_event_target) { .libinput = libinput });
 608         libinput_post_event(libinput, event);
 609 }
 610
 611 static void
 612 post_device_event(struct libinput_device *device,
 613                   enum libinput_event_type type,
 614                   struct libinput_event *event)
 615 {
 616         init_event_base(event, type,
 617                         (union libinput_event_target) { .device = device });
 618         libinput_post_event(device->seat->libinput, event);
 619 }
 620
 621 void
 622 notify_added_seat(struct libinput_seat *seat)
 623 {
 624         struct libinput_event_added_seat *added_seat_event;
 625
 626         added_seat_event = malloc(sizeof *added_seat_event);
 627         if (!added_seat_event)
 628                 return;
 629
 630         *added_seat_event = (struct libinput_event_added_seat) {
 631                 .seat = seat,
 632         };
 633
 634         post_base_event(seat->libinput,
 635                         LIBINPUT_EVENT_ADDED_SEAT,
 636                         &added_seat_event->base);
 637 }
 638
 639 void
 640 notify_removed_seat(struct libinput_seat *seat)
 641 {
 642         struct libinput_event_removed_seat *removed_seat_event;
 643
 644         removed_seat_event = malloc(sizeof *removed_seat_event);
 645         if (!removed_seat_event)
 646                 return;
 647
 648         *removed_seat_event = (struct libinput_event_removed_seat) {
 649                 .seat = seat,
 650         };
 651
 652         post_base_event(seat->libinput,
 653                         LIBINPUT_EVENT_REMOVED_SEAT,
 654                         &removed_seat_event->base);
 655 }
 656
 657 void
 658 notify_added_device(struct libinput_device *device)
 659 {
 660         struct libinput_event_added_device *added_device_event;
 661
 662         added_device_event = malloc(sizeof *added_device_event);
 663         if (!added_device_event)
 664                 return;
 665
 666         *added_device_event = (struct libinput_event_added_device) {
 667                 .device = device,
 668         };
 669
 670         post_base_event(device->seat->libinput,
 671                         LIBINPUT_EVENT_ADDED_DEVICE,
 672                         &added_device_event->base);
 673 }
 674
 675 void
 676 notify_removed_device(struct libinput_device *device)
 677 {
 678         struct libinput_event_removed_device *removed_device_event;
 679
 680         removed_device_event = malloc(sizeof *removed_device_event);
 681         if (!removed_device_event)
 682                 return;
 683
 684         *removed_device_event = (struct libinput_event_removed_device) {
 685                 .device = device,
 686         };
 687
 688         post_base_event(device->seat->libinput,
 689                         LIBINPUT_EVENT_REMOVED_DEVICE,
 690                         &removed_device_event->base);
 691 }
 692
 693 void
 694 device_register_capability(struct libinput_device *device,
 695                            enum libinput_device_capability capability)
 696 {
 697         struct libinput_event_device_register_capability *capability_event;
 698
 699         capability_event = malloc(sizeof *capability_event);
 700
 701         *capability_event = (struct libinput_event_device_register_capability) {
 702                 .capability = capability,
 703         };
 704
 705         post_device_event(device,
 706                           LIBINPUT_EVENT_DEVICE_REGISTER_CAPABILITY,
 707                           &capability_event->base);
 708 }
 709
 710 void
 711 device_unregister_capability(struct libinput_device *device,
 712                              enum libinput_device_capability capability)
 713 {
 714         struct libinput_event_device_unregister_capability *capability_event;
 715
 716         capability_event = malloc(sizeof *capability_event);
 717
 718         *capability_event = (struct libinput_event_device_unregister_capability) {
 719                 .capability = capability,
 720         };
 721
 722         post_device_event(device,
 723                           LIBINPUT_EVENT_DEVICE_UNREGISTER_CAPABILITY,
 724                           &capability_event->base);
 725 }
 726
 727 void
 728 keyboard_notify_key(struct libinput_device *device,
 729                     uint32_t time,
 730                     uint32_t key,
 731                     enum libinput_keyboard_key_state state)
 732 {
 733         struct libinput_event_keyboard_key *key_event;
 734
 735         key_event = malloc(sizeof *key_event);
 736         if (!key_event)
 737                 return;
 738
 739         *key_event = (struct libinput_event_keyboard_key) {
 740                 .time = time,
 741                 .key = key,
 742                 .state = state,
 743         };
 744
 745         post_device_event(device,
 746                           LIBINPUT_EVENT_KEYBOARD_KEY,
 747                           &key_event->base);
 748 }
 749
 750 void
 751 pointer_notify_motion(struct libinput_device *device,
 752                       uint32_t time,
 753                       li_fixed_t dx,
 754                       li_fixed_t dy)
 755 {
 756         struct libinput_event_pointer_motion *motion_event;
 757
 758         motion_event = malloc(sizeof *motion_event);
 759         if (!motion_event)
 760                 return;
 761
 762         *motion_event = (struct libinput_event_pointer_motion) {
 763                 .time = time,
 764                 .dx = dx,
 765                 .dy = dy,
 766         };
 767
 768         post_device_event(device,
 769                           LIBINPUT_EVENT_POINTER_MOTION,
 770                           &motion_event->base);
 771 }
 772
 773 void
 774 pointer_notify_motion_absolute(struct libinput_device *device,
 775                                uint32_t time,
 776                                li_fixed_t x,
 777                                li_fixed_t y)
 778 {
 779         struct libinput_event_pointer_motion_absolute *motion_absolute_event;
 780
 781         motion_absolute_event = malloc(sizeof *motion_absolute_event);
 782         if (!motion_absolute_event)
 783                 return;
 784
 785         *motion_absolute_event = (struct libinput_event_pointer_motion_absolute) {
 786                 .time = time,
 787                 .x = x,
 788                 .y = y,
 789         };
 790
 791         post_device_event(device,
 792                           LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE,
 793                           &motion_absolute_event->base);
 794 }
 795
 796 void
 797 pointer_notify_button(struct libinput_device *device,
 798                       uint32_t time,
 799                       int32_t button,
 800                       enum libinput_pointer_button_state state)
 801 {
 802         struct libinput_event_pointer_button *button_event;
 803
 804         button_event = malloc(sizeof *button_event);
 805         if (!button_event)
 806                 return;
 807
 808         *button_event = (struct libinput_event_pointer_button) {
 809                 .time = time,
 810                 .button = button,
 811                 .state = state,
 812         };
 813
 814         post_device_event(device,
 815                           LIBINPUT_EVENT_POINTER_BUTTON,
 816                           &button_event->base);
 817 }
 818
 819 void
 820 pointer_notify_axis(struct libinput_device *device,
 821                     uint32_t time,
 822                     enum libinput_pointer_axis axis,
 823                     li_fixed_t value)
 824 {
 825         struct libinput_event_pointer_axis *axis_event;
 826
 827         axis_event = malloc(sizeof *axis_event);
 828         if (!axis_event)
 829                 return;
 830
 831         *axis_event = (struct libinput_event_pointer_axis) {
 832                 .time = time,
 833                 .axis = axis,
 834                 .value = value,
 835         };
 836
 837         post_device_event(device,
 838                           LIBINPUT_EVENT_POINTER_AXIS,
 839                           &axis_event->base);
 840 }
 841
 842 void
 843 touch_notify_touch(struct libinput_device *device,
 844                    uint32_t time,
 845                    int32_t slot,
 846                    li_fixed_t x,
 847                    li_fixed_t y,
 848                    enum libinput_touch_type touch_type)
 849 {
 850         struct libinput_event_touch_touch *touch_event;
 851
 852         touch_event = malloc(sizeof *touch_event);
 853         if (!touch_event)
 854                 return;
 855
 856         *touch_event = (struct libinput_event_touch_touch) {
 857                 .time = time,
 858                 .slot = slot,
 859                 .x = x,
 860                 .y = y,
 861                 .touch_type = touch_type,
 862         };
 863
 864         post_device_event(device,
 865                           LIBINPUT_EVENT_TOUCH_TOUCH,
 866                           &touch_event->base);
 867 }
 868
 869 static void
 870 libinput_post_event(struct libinput *libinput,
 871                     struct libinput_event *event)
 872 {
 873         struct libinput_event **events = libinput->events;
 874         size_t events_len = libinput->events_len;
 875         size_t events_count = libinput->events_count;
 876         size_t move_len;
 877         size_t new_out;
 878
 879         events_count++;
 880         if (events_count > events_len) {
 881                 events_len *= 2;
 882                 events = realloc(events, events_len * sizeof *events);
 883                 if (!events) {
 884                         fprintf(stderr, "Failed to reallocate event ring "
 885                                 "buffer");
 886                         return;
 887                 }
 888
 889                 if (libinput->events_count > 0 && libinput->events_in == 0) {
 890                         libinput->events_in = libinput->events_len;
 891                 } else if (libinput->events_count > 0 &&
 892                            libinput->events_out >= libinput->events_in) {
 893                         move_len = libinput->events_len - libinput->events_out;
 894                         new_out = events_len - move_len;
 895                         memmove(events + new_out,
 896                                 events + libinput->events_out,
 897                                 move_len * sizeof *events);
 898                         libinput->events_out = new_out;
 899                 }
 900
 901                 libinput->events = events;
 902                 libinput->events_len = events_len;
 903         }
 904
 905         switch (libinput_event_get_class(event)) {
 906         case LIBINPUT_EVENT_CLASS_BASE:
 907                 break;
 908         case LIBINPUT_EVENT_CLASS_SEAT:
 909                 libinput_seat_ref(event->target.seat);
 910                 break;
 911         case LIBINPUT_EVENT_CLASS_DEVICE:
 912                 libinput_device_ref(event->target.device);
 913                 break;
 914         }
 915
 916         libinput->events_count = events_count;
 917         events[libinput->events_in] = event;
 918         libinput->events_in = (libinput->events_in + 1) % libinput->events_len;
 919 }
 920
 921 LIBINPUT_EXPORT struct libinput_event *
 922 libinput_get_event(struct libinput *libinput)
 923 {
 924         struct libinput_event *event;
 925
 926         if (libinput->events_count == 0)
 927                 return NULL;
 928
 929         event = libinput->events[libinput->events_out];
 930         libinput->events_out =
 931                 (libinput->events_out + 1) % libinput->events_len;
 932         libinput->events_count--;
 933
 934         return event;
 935 }
 936
 937 LIBINPUT_EXPORT void *
 938 libinput_get_user_data(struct libinput *libinput)
 939 {
 940         return libinput->user_data;
 941 }
 942
 943 LIBINPUT_EXPORT int
 944 libinput_resume(struct libinput *libinput)
 945 {
 946         return udev_input_enable((struct udev_input *) libinput);
 947 }
 948
 949 LIBINPUT_EXPORT void
 950 libinput_suspend(struct libinput *libinput)
 951 {
 952         udev_input_disable((struct udev_input *) libinput);
 953 }
 954
 955 LIBINPUT_EXPORT void
 956 libinput_device_set_user_data(struct libinput_device *device, void *user_data)
 957 {
 958         device->user_data = user_data;
 959 }
 960
 961 LIBINPUT_EXPORT void *
 962 libinput_device_get_user_data(struct libinput_device *device)
 963 {
 964         return device->user_data;
 965 }
 966
 967 LIBINPUT_EXPORT const char *
 968 libinput_device_get_sysname(struct libinput_device *device)
 969 {
 970         return evdev_device_get_sysname((struct evdev_device *) device);
 971 }
 972
 973 LIBINPUT_EXPORT const char *
 974 libinput_device_get_output_name(struct libinput_device *device)
 975 {
 976         return evdev_device_get_output((struct evdev_device *) device);
 977 }
 978
 979 LIBINPUT_EXPORT struct libinput_seat *
 980 libinput_device_get_seat(struct libinput_device *device)
 981 {
 982         return device->seat;
 983 }
 984
 985 LIBINPUT_EXPORT void
 986 libinput_device_led_update(struct libinput_device *device,
 987                            enum libinput_led leds)
 988 {
 989         evdev_device_led_update((struct evdev_device *) device, leds);
 990 }
 991
 992 LIBINPUT_EXPORT int
 993 libinput_device_get_keys(struct libinput_device *device,
 994                          char *keys, size_t size)
 995 {
 996         return evdev_device_get_keys((struct evdev_device *) device,
 997                                      keys,
 998                                      size);
 999 }
1000
1001 LIBINPUT_EXPORT void
1002 libinput_device_calibrate(struct libinput_device *device,
1003                           float calibration[6])
1004 {
1005         evdev_device_calibrate((struct evdev_device *) device, calibration);
1006 }
1007
1008 LIBINPUT_EXPORT int
1009 libinput_device_has_capability(struct libinput_device *device,
1010                                enum libinput_device_capability capability)
1011 {
1012         return evdev_device_has_capability((struct evdev_device *) device,
1013                                            capability);
1014 }