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->interface = interface;
 376         libinput->user_data = user_data;
 377         list_init(&libinput->source_destroy_list);
 378         list_init(&libinput->seat_list);
 379
 380         return 0;
 381 }
 382
 383 LIBINPUT_EXPORT void
 384 libinput_destroy(struct libinput *libinput)
 385 {
 386         struct libinput_event *event;
 387
 388         while ((event = libinput_get_event(libinput)))
 389                free(event);
 390         free(libinput->events);
 391
 392         close(libinput->epoll_fd);
 393         free(libinput);
 394 }
 395
 396 static enum libinput_event_class
 397 libinput_event_get_class(struct libinput_event *event)
 398 {
 399         switch (event->type) {
 400         case LIBINPUT_EVENT_ADDED_SEAT:
 401         case LIBINPUT_EVENT_REMOVED_SEAT:
 402         case LIBINPUT_EVENT_ADDED_DEVICE:
 403         case LIBINPUT_EVENT_REMOVED_DEVICE:
 404                 return LIBINPUT_EVENT_CLASS_BASE;
 405
 406         case LIBINPUT_EVENT_DEVICE_REGISTER_CAPABILITY:
 407         case LIBINPUT_EVENT_DEVICE_UNREGISTER_CAPABILITY:
 408         case LIBINPUT_EVENT_KEYBOARD_KEY:
 409         case LIBINPUT_EVENT_POINTER_MOTION:
 410         case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
 411         case LIBINPUT_EVENT_POINTER_BUTTON:
 412         case LIBINPUT_EVENT_POINTER_AXIS:
 413         case LIBINPUT_EVENT_TOUCH_TOUCH:
 414                 return LIBINPUT_EVENT_CLASS_DEVICE;
 415         }
 416
 417         /* We should never end up here. */
 418         abort();
 419 }
 420
 421 LIBINPUT_EXPORT void
 422 libinput_event_destroy(struct libinput_event *event)
 423 {
 424         switch (libinput_event_get_class(event)) {
 425         case LIBINPUT_EVENT_CLASS_BASE:
 426                 break;
 427         case LIBINPUT_EVENT_CLASS_SEAT:
 428                 libinput_seat_unref(event->target.seat);
 429                 break;
 430         case LIBINPUT_EVENT_CLASS_DEVICE:
 431                 libinput_device_unref(event->target.device);
 432                 break;
 433         }
 434
 435         free(event);
 436 }
 437
 438 int
 439 open_restricted(struct libinput *libinput,
 440                 const char *path, int flags)
 441 {
 442         return libinput->interface->open_restricted(path,
 443                                                     flags,
 444                                                     libinput->user_data);
 445 }
 446
 447 void
 448 close_restricted(struct libinput *libinput, int fd)
 449 {
 450         return libinput->interface->close_restricted(fd, libinput->user_data);
 451 }
 452
 453 void
 454 libinput_seat_init(struct libinput_seat *seat,
 455                    struct libinput *libinput,
 456                    const char *name)
 457 {
 458         seat->refcount = 1;
 459         seat->libinput = libinput;
 460         seat->name = strdup(name);
 461         list_init(&seat->devices_list);
 462 }
 463
 464 LIBINPUT_EXPORT void
 465 libinput_seat_ref(struct libinput_seat *seat)
 466 {
 467         seat->refcount++;
 468 }
 469
 470 LIBINPUT_EXPORT void
 471 libinput_seat_unref(struct libinput_seat *seat)
 472 {
 473         seat->refcount--;
 474         if (seat->refcount == 0) {
 475                 free(seat->name);
 476                 udev_seat_destroy((struct udev_seat *) seat);
 477         }
 478 }
 479
 480 LIBINPUT_EXPORT void
 481 libinput_seat_set_user_data(struct libinput_seat *seat, void *user_data)
 482 {
 483         seat->user_data = user_data;
 484 }
 485
 486 LIBINPUT_EXPORT void *
 487 libinput_seat_get_user_data(struct libinput_seat *seat)
 488 {
 489         return seat->user_data;
 490 }
 491
 492 LIBINPUT_EXPORT const char *
 493 libinput_seat_get_name(struct libinput_seat *seat)
 494 {
 495         return seat->name;
 496 }
 497
 498 void
 499 libinput_device_init(struct libinput_device *device,
 500                      struct libinput_seat *seat)
 501 {
 502         device->seat = seat;
 503         device->refcount = 1;
 504 }
 505
 506 LIBINPUT_EXPORT void
 507 libinput_device_ref(struct libinput_device *device)
 508 {
 509         device->refcount++;
 510 }
 511
 512 LIBINPUT_EXPORT void
 513 libinput_device_unref(struct libinput_device *device)
 514 {
 515         device->refcount--;
 516         if (device->refcount == 0)
 517                 evdev_device_destroy((struct evdev_device *) device);
 518 }
 519
 520 LIBINPUT_EXPORT int
 521 libinput_get_fd(struct libinput *libinput)
 522 {
 523         return libinput->epoll_fd;
 524 }
 525
 526 LIBINPUT_EXPORT int
 527 libinput_dispatch(struct libinput *libinput)
 528 {
 529         struct libinput_source *source, *next;
 530         struct epoll_event ep[32];
 531         int i, count;
 532
 533         count = epoll_wait(libinput->epoll_fd, ep, ARRAY_LENGTH(ep), 0);
 534         if (count < 0)
 535                 return -errno;
 536
 537         for (i = 0; i < count; ++i) {
 538                 source = ep[i].data.ptr;
 539                 if (source->fd == -1)
 540                         continue;
 541
 542                 source->dispatch(source->user_data);
 543         }
 544
 545         list_for_each_safe(source, next, &libinput->source_destroy_list, link)
 546                 free(source);
 547         list_init(&libinput->source_destroy_list);
 548
 549         return libinput->events_count > 0 ? 0 : -EAGAIN;
 550 }
 551
 552 static void
 553 init_event_base(struct libinput_event *event,
 554                 enum libinput_event_type type,
 555                 union libinput_event_target target)
 556 {
 557         event->type = type;
 558         event->target = target;
 559 }
 560
 561 static void
 562 post_base_event(struct libinput *libinput,
 563                 enum libinput_event_type type,
 564                 struct libinput_event *event)
 565 {
 566         init_event_base(event, type,
 567                         (union libinput_event_target) { .libinput = libinput });
 568         libinput_post_event(libinput, event);
 569 }
 570
 571 static void
 572 post_device_event(struct libinput_device *device,
 573                   enum libinput_event_type type,
 574                   struct libinput_event *event)
 575 {
 576         init_event_base(event, type,
 577                         (union libinput_event_target) { .device = device });
 578         libinput_post_event(device->seat->libinput, event);
 579 }
 580
 581 void
 582 notify_added_seat(struct libinput_seat *seat)
 583 {
 584         struct libinput_event_added_seat *added_seat_event;
 585
 586         added_seat_event = malloc(sizeof *added_seat_event);
 587         if (!added_seat_event)
 588                 return;
 589
 590         *added_seat_event = (struct libinput_event_added_seat) {
 591                 .seat = seat,
 592         };
 593
 594         post_base_event(seat->libinput,
 595                         LIBINPUT_EVENT_ADDED_SEAT,
 596                         &added_seat_event->base);
 597 }
 598
 599 void
 600 notify_removed_seat(struct libinput_seat *seat)
 601 {
 602         struct libinput_event_removed_seat *removed_seat_event;
 603
 604         removed_seat_event = malloc(sizeof *removed_seat_event);
 605         if (!removed_seat_event)
 606                 return;
 607
 608         *removed_seat_event = (struct libinput_event_removed_seat) {
 609                 .seat = seat,
 610         };
 611
 612         post_base_event(seat->libinput,
 613                         LIBINPUT_EVENT_REMOVED_SEAT,
 614                         &removed_seat_event->base);
 615 }
 616
 617 void
 618 notify_added_device(struct libinput_device *device)
 619 {
 620         struct libinput_event_added_device *added_device_event;
 621
 622         added_device_event = malloc(sizeof *added_device_event);
 623         if (!added_device_event)
 624                 return;
 625
 626         *added_device_event = (struct libinput_event_added_device) {
 627                 .device = device,
 628         };
 629
 630         post_base_event(device->seat->libinput,
 631                         LIBINPUT_EVENT_ADDED_DEVICE,
 632                         &added_device_event->base);
 633 }
 634
 635 void
 636 notify_removed_device(struct libinput_device *device)
 637 {
 638         struct libinput_event_removed_device *removed_device_event;
 639
 640         removed_device_event = malloc(sizeof *removed_device_event);
 641         if (!removed_device_event)
 642                 return;
 643
 644         *removed_device_event = (struct libinput_event_removed_device) {
 645                 .device = device,
 646         };
 647
 648         post_base_event(device->seat->libinput,
 649                         LIBINPUT_EVENT_REMOVED_DEVICE,
 650                         &removed_device_event->base);
 651 }
 652
 653 void
 654 device_register_capability(struct libinput_device *device,
 655                            enum libinput_device_capability capability)
 656 {
 657         struct libinput_event_device_register_capability *capability_event;
 658
 659         capability_event = malloc(sizeof *capability_event);
 660
 661         *capability_event = (struct libinput_event_device_register_capability) {
 662                 .capability = capability,
 663         };
 664
 665         post_device_event(device,
 666                           LIBINPUT_EVENT_DEVICE_REGISTER_CAPABILITY,
 667                           &capability_event->base);
 668 }
 669
 670 void
 671 device_unregister_capability(struct libinput_device *device,
 672                              enum libinput_device_capability capability)
 673 {
 674         struct libinput_event_device_unregister_capability *capability_event;
 675
 676         capability_event = malloc(sizeof *capability_event);
 677
 678         *capability_event = (struct libinput_event_device_unregister_capability) {
 679                 .capability = capability,
 680         };
 681
 682         post_device_event(device,
 683                           LIBINPUT_EVENT_DEVICE_UNREGISTER_CAPABILITY,
 684                           &capability_event->base);
 685 }
 686
 687 void
 688 keyboard_notify_key(struct libinput_device *device,
 689                     uint32_t time,
 690                     uint32_t key,
 691                     enum libinput_keyboard_key_state state)
 692 {
 693         struct libinput_event_keyboard_key *key_event;
 694
 695         key_event = malloc(sizeof *key_event);
 696         if (!key_event)
 697                 return;
 698
 699         *key_event = (struct libinput_event_keyboard_key) {
 700                 .time = time,
 701                 .key = key,
 702                 .state = state,
 703         };
 704
 705         post_device_event(device,
 706                           LIBINPUT_EVENT_KEYBOARD_KEY,
 707                           &key_event->base);
 708 }
 709
 710 void
 711 pointer_notify_motion(struct libinput_device *device,
 712                       uint32_t time,
 713                       li_fixed_t dx,
 714                       li_fixed_t dy)
 715 {
 716         struct libinput_event_pointer_motion *motion_event;
 717
 718         motion_event = malloc(sizeof *motion_event);
 719         if (!motion_event)
 720                 return;
 721
 722         *motion_event = (struct libinput_event_pointer_motion) {
 723                 .time = time,
 724                 .dx = dx,
 725                 .dy = dy,
 726         };
 727
 728         post_device_event(device,
 729                           LIBINPUT_EVENT_POINTER_MOTION,
 730                           &motion_event->base);
 731 }
 732
 733 void
 734 pointer_notify_motion_absolute(struct libinput_device *device,
 735                                uint32_t time,
 736                                li_fixed_t x,
 737                                li_fixed_t y)
 738 {
 739         struct libinput_event_pointer_motion_absolute *motion_absolute_event;
 740
 741         motion_absolute_event = malloc(sizeof *motion_absolute_event);
 742         if (!motion_absolute_event)
 743                 return;
 744
 745         *motion_absolute_event = (struct libinput_event_pointer_motion_absolute) {
 746                 .time = time,
 747                 .x = x,
 748                 .y = y,
 749         };
 750
 751         post_device_event(device,
 752                           LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE,
 753                           &motion_absolute_event->base);
 754 }
 755
 756 void
 757 pointer_notify_button(struct libinput_device *device,
 758                       uint32_t time,
 759                       int32_t button,
 760                       enum libinput_pointer_button_state state)
 761 {
 762         struct libinput_event_pointer_button *button_event;
 763
 764         button_event = malloc(sizeof *button_event);
 765         if (!button_event)
 766                 return;
 767
 768         *button_event = (struct libinput_event_pointer_button) {
 769                 .time = time,
 770                 .button = button,
 771                 .state = state,
 772         };
 773
 774         post_device_event(device,
 775                           LIBINPUT_EVENT_POINTER_BUTTON,
 776                           &button_event->base);
 777 }
 778
 779 void
 780 pointer_notify_axis(struct libinput_device *device,
 781                     uint32_t time,
 782                     enum libinput_pointer_axis axis,
 783                     li_fixed_t value)
 784 {
 785         struct libinput_event_pointer_axis *axis_event;
 786
 787         axis_event = malloc(sizeof *axis_event);
 788         if (!axis_event)
 789                 return;
 790
 791         *axis_event = (struct libinput_event_pointer_axis) {
 792                 .time = time,
 793                 .axis = axis,
 794                 .value = value,
 795         };
 796
 797         post_device_event(device,
 798                           LIBINPUT_EVENT_POINTER_AXIS,
 799                           &axis_event->base);
 800 }
 801
 802 void
 803 touch_notify_touch(struct libinput_device *device,
 804                    uint32_t time,
 805                    int32_t slot,
 806                    li_fixed_t x,
 807                    li_fixed_t y,
 808                    enum libinput_touch_type touch_type)
 809 {
 810         struct libinput_event_touch_touch *touch_event;
 811
 812         touch_event = malloc(sizeof *touch_event);
 813         if (!touch_event)
 814                 return;
 815
 816         *touch_event = (struct libinput_event_touch_touch) {
 817                 .time = time,
 818                 .slot = slot,
 819                 .x = x,
 820                 .y = y,
 821                 .touch_type = touch_type,
 822         };
 823
 824         post_device_event(device,
 825                           LIBINPUT_EVENT_TOUCH_TOUCH,
 826                           &touch_event->base);
 827 }
 828
 829 static void
 830 libinput_post_event(struct libinput *libinput,
 831                     struct libinput_event *event)
 832 {
 833         struct libinput_event **events = libinput->events;
 834         size_t events_len = libinput->events_len;
 835         size_t events_count = libinput->events_count;
 836         size_t move_len;
 837         size_t new_out;
 838
 839         events_count++;
 840         if (events_count > events_len) {
 841                 if (events_len == 0)
 842                         events_len = 4;
 843                 else
 844                         events_len *= 2;
 845                 events = realloc(events, events_len * sizeof *events);
 846                 if (!events) {
 847                         fprintf(stderr, "Failed to reallocate event ring "
 848                                 "buffer");
 849                         return;
 850                 }
 851
 852                 if (libinput->events_count > 0 && libinput->events_in == 0) {
 853                         libinput->events_in = libinput->events_len;
 854                 } else if (libinput->events_count > 0 &&
 855                            libinput->events_out >= libinput->events_in) {
 856                         move_len = libinput->events_len - libinput->events_out;
 857                         new_out = events_len - move_len;
 858                         memmove(events + new_out,
 859                                 libinput->events + libinput->events_out,
 860                                 move_len * sizeof *events);
 861                         libinput->events_out = new_out;
 862                 }
 863
 864                 libinput->events = events;
 865                 libinput->events_len = events_len;
 866         }
 867
 868         switch (libinput_event_get_class(event)) {
 869         case LIBINPUT_EVENT_CLASS_BASE:
 870                 break;
 871         case LIBINPUT_EVENT_CLASS_SEAT:
 872                 libinput_seat_ref(event->target.seat);
 873                 break;
 874         case LIBINPUT_EVENT_CLASS_DEVICE:
 875                 libinput_device_ref(event->target.device);
 876                 break;
 877         }
 878
 879         libinput->events_count = events_count;
 880         events[libinput->events_in] = event;
 881         libinput->events_in = (libinput->events_in + 1) % libinput->events_len;
 882 }
 883
 884 LIBINPUT_EXPORT struct libinput_event *
 885 libinput_get_event(struct libinput *libinput)
 886 {
 887         struct libinput_event *event;
 888
 889         if (libinput->events_count == 0)
 890                 return NULL;
 891
 892         event = libinput->events[libinput->events_out];
 893         libinput->events_out =
 894                 (libinput->events_out + 1) % libinput->events_len;
 895         libinput->events_count--;
 896
 897         return event;
 898 }
 899
 900 LIBINPUT_EXPORT void *
 901 libinput_get_user_data(struct libinput *libinput)
 902 {
 903         return libinput->user_data;
 904 }
 905
 906 LIBINPUT_EXPORT int
 907 libinput_resume(struct libinput *libinput)
 908 {
 909         return udev_input_enable((struct udev_input *) libinput);
 910 }
 911
 912 LIBINPUT_EXPORT void
 913 libinput_suspend(struct libinput *libinput)
 914 {
 915         udev_input_disable((struct udev_input *) libinput);
 916 }
 917
 918 LIBINPUT_EXPORT void
 919 libinput_device_set_user_data(struct libinput_device *device, void *user_data)
 920 {
 921         device->user_data = user_data;
 922 }
 923
 924 LIBINPUT_EXPORT void *
 925 libinput_device_get_user_data(struct libinput_device *device)
 926 {
 927         return device->user_data;
 928 }
 929
 930 LIBINPUT_EXPORT const char *
 931 libinput_device_get_output_name(struct libinput_device *device)
 932 {
 933         return evdev_device_get_output((struct evdev_device *) device);
 934 }
 935
 936 LIBINPUT_EXPORT struct libinput_seat *
 937 libinput_device_get_seat(struct libinput_device *device)
 938 {
 939         return device->seat;
 940 }
 941
 942 LIBINPUT_EXPORT void
 943 libinput_device_led_update(struct libinput_device *device,
 944                            enum libinput_led leds)
 945 {
 946         evdev_device_led_update((struct evdev_device *) device, leds);
 947 }
 948
 949 LIBINPUT_EXPORT int
 950 libinput_device_get_keys(struct libinput_device *device,
 951                          char *keys, size_t size)
 952 {
 953         return evdev_device_get_keys((struct evdev_device *) device,
 954                                      keys,
 955                                      size);
 956 }
 957
 958 LIBINPUT_EXPORT void
 959 libinput_device_calibrate(struct libinput_device *device,
 960                           float calibration[6])
 961 {
 962         evdev_device_calibrate((struct evdev_device *) device, calibration);
 963 }