src/tdm_thread.c

   1 /**************************************************************************
   2  *
   3  * libtdm
   4  *
   5  * Copyright 2015 Samsung Electronics co., Ltd. All Rights Reserved.
   6  *
   7  * Contact: Eunchul Kim <chulspro.kim@samsung.com>,
   8  *          JinYoung Jeon <jy0.jeon@samsung.com>,
   9  *          Taeheon Kim <th908.kim@samsung.com>,
  10  *          YoungJun Cho <yj44.cho@samsung.com>,
  11  *          SooChan Lim <sc1.lim@samsung.com>,
  12  *          Boram Park <sc1.lim@samsung.com>
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the
  16  * "Software"), to deal in the Software without restriction, including
  17  * without limitation the rights to use, copy, modify, merge, publish,
  18  * distribute, sub license, and/or sell copies of the Software, and to
  19  * permit persons to whom the Software is furnished to do so, subject to
  20  * the following conditions:
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  27  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  29  * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  30  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  31  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  32  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33  *
  34 **************************************************************************/
  35
  36 #ifdef HAVE_CONFIG_H
  37 #include "config.h"
  38 #endif
  39
  40 #include "tdm_private.h"
  41
  42 static tdm_private_thread *keep_private_thread;
  43
  44 struct _tdm_private_thread {
  45         tdm_private_loop *private_loop;
  46
  47         pthread_cond_t event_cond;
  48         pthread_t event_thread;
  49
  50         pid_t display_tid;
  51         pid_t thread_tid;
  52
  53         /* 0: read, 1: write (tdm-thread -> display-thread) */
  54         int pipe[2];
  55
  56         /* 0: read, 1: write (tdm-thread <- display-thread) */
  57         int sub_pipe[2];
  58         tdm_event_loop_source *sub_event_source;
  59 };
  60
  61 typedef struct _tdm_private_thread_cb {
  62         struct list_head link;
  63         struct list_head call_link;
  64
  65         void *object;
  66         tdm_thread_cb_type cb_type;
  67         void *cb_data;
  68         tdm_thread_cb func;
  69         void *user_data;
  70
  71         pid_t owner_tid;
  72         unsigned int called;
  73 } tdm_private_thread_cb;
  74
  75 static tdm_thread_find_object find_funcs[TDM_THREAD_CB_MAX] = {0, };
  76 static struct list_head cb_list;
  77
  78 static void _tdm_thread_free_cb(tdm_private_thread_cb *cb);
  79
  80 static tdm_error
  81 _tdm_thread_handle_events(int fd, tdm_event_loop_mask mask, void *user_data)
  82 {
  83         tdm_private_loop *private_loop = user_data;
  84         tdm_error ret;
  85
  86         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
  87         TDM_RETURN_VAL_IF_FAIL(private_loop != NULL, TDM_ERROR_OPERATION_FAILED);
  88         TDM_RETURN_VAL_IF_FAIL(private_loop->dpy != NULL, TDM_ERROR_OPERATION_FAILED);
  89
  90         ret = tdm_thread_handle_cb(private_loop);
  91
  92         TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, ret);
  93
  94         return TDM_ERROR_NONE;
  95 }
  96
  97 static void*
  98 _tdm_thread_main(void *data)
  99 {
 100         tdm_private_thread *private_thread = (tdm_private_thread*)data;
 101         tdm_private_loop *private_loop = private_thread->private_loop;
 102         int fd;
 103         struct pollfd fds;
 104         int ret;
 105         tdm_error error;
 106
 107         /* Not lock/unlock for the private_thread and private_loop structure
 108          * because they won't be destroyed as long as tdm thread is running.
 109          * When they're destroyed, we have already exit the tdm thread.
 110          */
 111         private_thread->thread_tid = syscall(SYS_gettid);
 112
 113         TDM_INFO("display_tid:%d, thread_tid: %d",
 114                          private_thread->display_tid, private_thread->thread_tid);
 115
 116         /* fd SHOULD be the same with sub_pipe[0] to make sure that using
 117          * tdm_thread_get_fd, tdm_thread_send_cb, tdm_thread_handle_cb in
 118          * both threads is fine. Otherwise, assert.
 119          */
 120         tdm_display_lock(private_loop->dpy);
 121         assert(tdm_thread_get_fd(private_loop) == private_thread->sub_pipe[0]);
 122
 123         private_thread->sub_event_source =
 124                 tdm_event_loop_add_fd_handler(private_loop->dpy,
 125                                                                           private_thread->sub_pipe[0],
 126                                                                           TDM_EVENT_LOOP_READABLE,
 127                                                                           _tdm_thread_handle_events,
 128                                                                           private_loop,
 129                                                                           &error);
 130         TDM_GOTO_IF_FAIL(error == TDM_ERROR_NONE, exit_thread);
 131         TDM_GOTO_IF_FAIL(private_thread->sub_event_source != NULL, exit_thread);
 132
 133         pthread_cond_signal(&private_thread->event_cond);
 134
 135         /* mutex shall be locked by the thread calling pthread_cond_signal() */
 136         tdm_display_unlock(private_loop->dpy);
 137
 138         fd = tdm_event_loop_get_fd(private_loop->dpy);
 139         if (fd < 0) {
 140                 TDM_ERR("couldn't get fd");
 141                 goto exit_thread;
 142         }
 143
 144         fds.events = POLLIN;
 145         fds.fd = fd;
 146         fds.revents = 0;
 147
 148         while (1) {
 149                 if (tdm_debug_module & TDM_DEBUG_EVENT)
 150                         TDM_INFO("server flush");
 151                 tdm_event_loop_flush(private_loop->dpy);
 152
 153                 if (tdm_debug_module & TDM_DEBUG_EVENT)
 154                         TDM_INFO("fd(%d) polling in", fd);
 155
 156                 ret = poll(&fds, 1, -1);
 157
 158                 if (tdm_debug_module & TDM_DEBUG_EVENT)
 159                         TDM_INFO("fd(%d) polling out", fd);
 160
 161                 if (ret < 0) {
 162                         if (errno == EINTR || errno == EAGAIN)  /* normal case */
 163                                 continue;
 164                         else {
 165                                 TDM_ERR("poll failed: %m");
 166                                 goto exit_thread;
 167                         }
 168                 }
 169
 170                 if (tdm_debug_module & TDM_DEBUG_EVENT)
 171                         TDM_INFO("thread got events");
 172
 173                 if (tdm_event_loop_dispatch(private_loop->dpy) < 0)
 174                         TDM_ERR("dispatch error");
 175         }
 176
 177 exit_thread:
 178         tdm_display_unlock(private_loop->dpy);
 179         pthread_exit(NULL);
 180 }
 181
 182 /* NOTE: tdm thread doesn't care about multi-thread. */
 183 INTERN tdm_error
 184 tdm_thread_init(tdm_private_loop *private_loop)
 185 {
 186         tdm_private_display *private_display;
 187         tdm_private_thread *private_thread;
 188         int thread;
 189
 190         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
 191         TDM_RETURN_VAL_IF_FAIL(private_loop->dpy, TDM_ERROR_OPERATION_FAILED);
 192
 193         private_display = private_loop->dpy;
 194         TDM_RETURN_VAL_IF_FAIL(private_display->private_loop, TDM_ERROR_OPERATION_FAILED);
 195
 196         LIST_INITHEAD(&cb_list);
 197
 198         if (private_loop->private_thread)
 199                 return TDM_ERROR_NONE;
 200
 201         /* enable as default */
 202         thread = tdm_config_get_int(TDM_CONFIG_KEY_GENERAL_THREAD, 1);
 203         if (!thread) {
 204                 TDM_INFO("not using a TDM event thread");
 205                 return TDM_ERROR_NONE;
 206         }
 207
 208         private_thread = calloc(1, sizeof * private_thread);
 209         if (!private_thread) {
 210                 TDM_ERR("alloc failed");
 211                 return TDM_ERROR_OUT_OF_MEMORY;
 212         }
 213
 214         if (pthread_cond_init(&private_thread->event_cond, NULL)) {
 215                 TDM_ERR("pthread_cond_init failed: %m");
 216                 free(private_thread);
 217                 return TDM_ERROR_OUT_OF_MEMORY;
 218         }
 219
 220         if (pipe(private_thread->pipe) != 0) {
 221                 TDM_ERR("pipe failed: %m");
 222                 pthread_cond_destroy(&private_thread->event_cond);
 223                 free(private_thread);
 224                 return TDM_ERROR_OPERATION_FAILED;
 225         }
 226
 227         if (pipe(private_thread->sub_pipe) != 0) {
 228                 TDM_ERR("sub_pipe failed: %m");
 229                 close(private_thread->pipe[0]);
 230                 close(private_thread->pipe[1]);
 231                 pthread_cond_destroy(&private_thread->event_cond);
 232                 free(private_thread);
 233                 return TDM_ERROR_OPERATION_FAILED;
 234         }
 235
 236         keep_private_thread = private_thread;
 237
 238         private_thread->private_loop = private_loop;
 239         private_loop->private_thread = private_thread;
 240
 241         private_thread->display_tid = syscall(SYS_gettid);
 242
 243         /* pthread_cond_wait atomically release mutex, Upon successful return,
 244          * the mutex shall have been locked and shall be owned by the calling thread
 245          */
 246         tdm_mutex_locked = 0;
 247         pthread_create(&private_thread->event_thread, NULL, _tdm_thread_main,
 248                                    private_thread);
 249
 250         /* wait until the tdm thread starts */
 251         pthread_cond_wait(&private_thread->event_cond, &private_display->lock);
 252         tdm_mutex_locked = 1;
 253
 254         TDM_INFO("using a TDM event thread. pipe(%d,%d) sub_pipe(%d,%d)",
 255                          private_thread->pipe[0], private_thread->pipe[1],
 256                          private_thread->sub_pipe[0], private_thread->sub_pipe[1]);
 257
 258         return TDM_ERROR_NONE;
 259 }
 260
 261 INTERN void
 262 tdm_thread_deinit(tdm_private_loop *private_loop)
 263 {
 264         tdm_private_display *private_display;
 265         tdm_private_thread_cb *cb = NULL, *hh = NULL;
 266         int i;
 267
 268         TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
 269
 270         if (!private_loop->private_thread)
 271                 return;
 272
 273         if (private_loop->private_thread->sub_event_source)
 274                 tdm_event_loop_source_remove(private_loop->private_thread->sub_event_source);
 275
 276         pthread_cancel(private_loop->private_thread->event_thread);
 277
 278         private_display = private_loop->dpy;
 279
 280         /* before falling into the block of pthread_join, we have to unlock the mutex
 281          * for subthread to use the mutex.
 282          */
 283         _pthread_mutex_unlock(&private_display->lock);
 284         pthread_join(private_loop->private_thread->event_thread, NULL);
 285
 286         tdm_log_reset();
 287
 288         LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &cb_list, link) {
 289                 _tdm_thread_free_cb(cb);
 290         }
 291
 292         if (private_loop->private_thread->pipe[0] >= 0)
 293                 close(private_loop->private_thread->pipe[0]);
 294         if (private_loop->private_thread->pipe[1] >= 0)
 295                 close(private_loop->private_thread->pipe[1]);
 296
 297         if (private_loop->private_thread->sub_pipe[0] >= 0)
 298                 close(private_loop->private_thread->sub_pipe[0]);
 299         if (private_loop->private_thread->sub_pipe[1] >= 0)
 300                 close(private_loop->private_thread->sub_pipe[1]);
 301
 302         pthread_cond_destroy(&private_loop->private_thread->event_cond);
 303
 304         free(private_loop->private_thread);
 305         private_loop->private_thread = NULL;
 306         keep_private_thread = NULL;
 307
 308         for (i = 0; i < TDM_THREAD_CB_MAX; i++)
 309                 find_funcs[i] = NULL;
 310
 311         TDM_INFO("Finish a TDM event thread");
 312 }
 313
 314 INTERN int
 315 tdm_thread_get_fd(tdm_private_loop *private_loop)
 316 {
 317         tdm_private_thread *private_thread;
 318         int in_main;
 319
 320         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
 321         TDM_RETURN_VAL_IF_FAIL(private_loop, -1);
 322         TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, -1);
 323
 324         private_thread = private_loop->private_thread;
 325
 326         /* seems like ticky. but easy way to use the same APIs for both threads */
 327         in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
 328
 329         if (in_main)
 330                 return private_thread->pipe[0];
 331         else
 332                 return private_thread->sub_pipe[0];
 333 }
 334
 335 INTERN tdm_error
 336 tdm_thread_send_cb(tdm_private_loop *private_loop, tdm_thread_cb_base *base)
 337 {
 338         tdm_private_thread *private_thread;
 339         ssize_t len;
 340         int pipe, in_main;
 341
 342         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
 343         TDM_RETURN_VAL_IF_FAIL(base, TDM_ERROR_INVALID_PARAMETER);
 344         TDM_RETURN_VAL_IF_FAIL(private_loop, TDM_ERROR_INVALID_PARAMETER);
 345         TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, TDM_ERROR_INVALID_PARAMETER);
 346
 347         private_thread = private_loop->private_thread;
 348
 349         /* seems like ticky. but easy way to use the same APIs for both threads */
 350         in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
 351
 352         if (in_main)
 353                 pipe = private_thread->sub_pipe[1];
 354         else
 355                 pipe = private_thread->pipe[1];
 356
 357         if (tdm_debug_module & TDM_DEBUG_THREAD)
 358                 TDM_INFO("fd(%d) type(%d), length(%d)", pipe, base->type, base->length);
 359
 360         len = write(pipe, base, base->length);
 361         if (len != base->length) {
 362                 TDM_ERR("write failed (%d != %d): %m", (int)len, base->length);
 363                 return TDM_ERROR_OPERATION_FAILED;
 364         }
 365
 366         if (tdm_debug_module & TDM_DEBUG_THREAD)
 367                 TDM_INFO("[%s] write fd(%d) length(%d)", (in_main) ? "main" : "sub", pipe, len);
 368
 369         return TDM_ERROR_NONE;
 370 }
 371
 372 INTERN tdm_error
 373 tdm_thread_handle_cb(tdm_private_loop *private_loop)
 374 {
 375         tdm_private_thread *private_thread;
 376         tdm_thread_cb_base *base;
 377         char buffer[1024];
 378         unsigned int i;
 379         int len, pipe, in_main;
 380
 381         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
 382         TDM_RETURN_VAL_IF_FAIL(private_loop, TDM_ERROR_INVALID_PARAMETER);
 383         TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, TDM_ERROR_INVALID_PARAMETER);
 384
 385         private_thread = private_loop->private_thread;
 386
 387         /* seems like ticky. but easy way to use the same APIs for both threads */
 388         in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
 389
 390         if (in_main)
 391                 pipe = private_thread->pipe[0];
 392         else
 393                 pipe = private_thread->sub_pipe[0];
 394
 395         do {
 396                 len = read(pipe, buffer, sizeof buffer);
 397         } while (len < 0 && errno == EINTR);
 398
 399         if (tdm_debug_module & TDM_DEBUG_THREAD)
 400                 TDM_INFO("[%s] read fd(%d) length(%d)", (in_main) ? "main" : "sub", pipe, len);
 401
 402         if (len < 0) {
 403                 TDM_ERR("read failed: errno(%d), len(%d) %m", errno, len);
 404                 return TDM_ERROR_OPERATION_FAILED;
 405         }
 406
 407         if (len == 0)
 408                 return TDM_ERROR_NONE;
 409
 410         if (len < sizeof * base) {
 411                 TDM_ERR("read failed: len(%d)", len);
 412                 return TDM_ERROR_OPERATION_FAILED;
 413         }
 414
 415         i = 0;
 416         while (i < len) {
 417                 base = (tdm_thread_cb_base*)&buffer[i];
 418                 if (tdm_debug_module & TDM_DEBUG_THREAD)
 419                         TDM_INFO("type(%d), length(%d)", base->type, base->length);
 420                 switch (base->type) {
 421                 case TDM_THREAD_CB_OUTPUT_COMMIT: {
 422                         tdm_thread_cb_output_commit *output_commit = (tdm_thread_cb_output_commit*)base;
 423                         tdm_output *output_backend =
 424                                 tdm_display_find_output_stamp(private_loop->dpy, output_commit->output_stamp);
 425                         if (!output_backend) {
 426                                 TDM_WRN("no output(%f)", output_commit->output_stamp);
 427                                 break;
 428                         }
 429                         tdm_output_cb_commit(output_backend, output_commit->sequence,
 430                                                                  output_commit->tv_sec, output_commit->tv_usec,
 431                                                                  output_commit->user_data);
 432                         break;
 433                 }
 434                 case TDM_THREAD_CB_OUTPUT_VBLANK: {
 435                         tdm_thread_cb_output_vblank *output_vblank = (tdm_thread_cb_output_vblank*)base;
 436                         tdm_output *output_backend =
 437                                 tdm_display_find_output_stamp(private_loop->dpy, output_vblank->output_stamp);
 438                         if (!output_backend) {
 439                                 TDM_WRN("no output(%f)", output_vblank->output_stamp);
 440                                 break;
 441                         }
 442                         tdm_output_cb_vblank(output_backend, output_vblank->sequence,
 443                                                                  output_vblank->tv_sec, output_vblank->tv_usec,
 444                                                                  output_vblank->user_data);
 445                         break;
 446                 }
 447                 case TDM_THREAD_CB_OUTPUT_STATUS: {
 448                         /* LCOV_EXCL_START */
 449                         tdm_thread_cb_output_status *output_status = (tdm_thread_cb_output_status*)base;
 450                         tdm_output *output_backend =
 451                                 tdm_display_find_output_stamp(private_loop->dpy, output_status->output_stamp);
 452                         if (!output_backend) {
 453                                 TDM_WRN("no output(%f)", output_status->output_stamp);
 454                                 break;
 455                         }
 456                         tdm_output_cb_status(output_backend, output_status->status,
 457                                                                  output_status->user_data);
 458                         break;
 459                         /* LCOV_EXCL_STOP */
 460                 }
 461                 case TDM_THREAD_CB_OUTPUT_DPMS: {
 462                         /* LCOV_EXCL_START */
 463                         tdm_thread_cb_output_dpms *output_dpms = (tdm_thread_cb_output_dpms*)base;
 464                         tdm_output *output_backend =
 465                                 tdm_display_find_output_stamp(private_loop->dpy, output_dpms->output_stamp);
 466                         if (!output_backend) {
 467                                 TDM_WRN("no output(%f)", output_dpms->output_stamp);
 468                                 break;
 469                         }
 470                         tdm_output_cb_dpms(output_backend, output_dpms->dpms, output_dpms->user_data);
 471                         break;
 472                         /* LCOV_EXCL_STOP */
 473                 }
 474                 case TDM_THREAD_CB_PP_DONE:
 475                         tdm_thread_cb_call(NULL, base);
 476                         break;
 477                 case TDM_THREAD_CB_CAPTURE_DONE: {
 478                         tdm_thread_cb_capture_done *capture_done = (tdm_thread_cb_capture_done*)base;
 479                         tdm_capture *capture_backend =
 480                                 tdm_capture_find_stamp(private_loop->dpy, capture_done->capture_stamp);
 481                         if (!capture_backend) {
 482                                 TDM_WRN("no capture(%f)", capture_done->capture_stamp);
 483                                 break;
 484                         }
 485                         tdm_capture_cb_done(capture_backend, capture_done->buffer, capture_done->user_data);
 486                         break;
 487                 }
 488                 case TDM_THREAD_CB_VBLANK_SW: {
 489                         tdm_thread_cb_vblank_sw *vblank_sw = (tdm_thread_cb_vblank_sw*)base;
 490                         tdm_vblank_cb_vblank_SW(NULL, vblank_sw->vblank_stamp);
 491                         break;
 492                 }
 493                 case TDM_THREAD_CB_VBLANK_CREATE: {
 494                         tdm_thread_cb_vblank_create *vblank_create = (tdm_thread_cb_vblank_create*)base;
 495                         tdm_vblank_cb_vblank_create(NULL, vblank_create->vblank_stamp);
 496                         break;
 497                 }
 498                 case TDM_THREAD_CB_NEED_VALIDATE: {
 499                         tdm_thread_cb_need_validate *ev = (tdm_thread_cb_need_validate*)base;
 500                         tdm_output_cb_need_validate(ev->o);
 501                         break;
 502                 }
 503                 default:
 504                         break;
 505                 }
 506                 i += base->length;
 507         }
 508
 509         return TDM_ERROR_NONE;
 510 }
 511
 512 INTERN int
 513 tdm_thread_in_display_thread(pid_t tid)
 514 {
 515         if (!keep_private_thread)
 516                 return 1;
 517
 518         /* DON'T check TDM_MUTEX_IS_LOCKED here */
 519
 520         return (keep_private_thread->display_tid == tid) ? 1 : 0;
 521 }
 522
 523 INTERN int
 524 tdm_thread_is_running(void)
 525 {
 526         /* DON'T check TDM_MUTEX_IS_LOCKED here */
 527
 528         return (keep_private_thread) ? 1 : 0;
 529 }
 530
 531 static void
 532 _tdm_thread_free_cb(tdm_private_thread_cb *cb)
 533 {
 534         if (tdm_debug_module & TDM_DEBUG_THREAD)
 535                 TDM_INFO("cb(%p) removed", cb);
 536
 537         assert(LIST_IS_EMPTY(&cb->call_link));
 538
 539         LIST_DEL(&cb->link);
 540         free(cb);
 541 }
 542
 543 static tdm_private_thread_cb *
 544 _tdm_thread_find_cb(void *object, tdm_thread_cb_type cb_type, void *cb_data, tdm_thread_cb func, void *user_data, pid_t owner_tid)
 545 {
 546         tdm_private_thread_cb *cb = NULL;
 547
 548         LIST_FOR_EACH_ENTRY(cb, &cb_list, link) {
 549                 if (cb->object == object &&
 550                         cb->cb_type == cb_type &&
 551                         cb->cb_data == cb_data &&
 552                         cb->func == func &&
 553                         cb->user_data == user_data &&
 554                         cb->owner_tid == owner_tid)
 555                         return cb;
 556         }
 557
 558         return NULL;
 559 }
 560
 561 static void
 562 _tdm_thread_reset_cb(tdm_thread_cb_type cb_type)
 563 {
 564         tdm_private_thread_cb *cb = NULL;
 565
 566         LIST_FOR_EACH_ENTRY(cb, &cb_list, link) {
 567                 if (cb->cb_type == cb_type)
 568                         cb->called = 0;
 569         }
 570 }
 571
 572 INTERN void
 573 tdm_thread_cb_set_find_func(tdm_thread_cb_type cb_type, tdm_thread_find_object func)
 574 {
 575         TDM_RETURN_IF_FAIL(cb_type > 0);
 576
 577         if (func && find_funcs[cb_type])
 578                 TDM_NEVER_GET_HERE();
 579
 580         find_funcs[cb_type] = func;
 581 }
 582
 583 INTERN tdm_error
 584 tdm_thread_cb_add(void *object, tdm_thread_cb_type cb_type, void *cb_data, tdm_thread_cb func, void *user_data)
 585 {
 586         tdm_private_thread_cb *cb = NULL;
 587         pid_t caller_tid;
 588
 589         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
 590         TDM_RETURN_VAL_IF_FAIL(object != NULL, TDM_ERROR_INVALID_PARAMETER);
 591         TDM_RETURN_VAL_IF_FAIL(cb_type > 0, TDM_ERROR_INVALID_PARAMETER);
 592         TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
 593
 594         caller_tid = syscall(SYS_gettid);
 595
 596         cb = _tdm_thread_find_cb(object, cb_type, cb_data, func, user_data, caller_tid);
 597         if (cb) {
 598                 TDM_ERR("can't be added twice with same data");
 599 #if 1
 600                 assert(0);
 601 #endif
 602                 return TDM_ERROR_BAD_REQUEST;
 603         }
 604
 605         cb = calloc(1, sizeof *cb);
 606         if (!cb) {
 607                 TDM_ERR("calloc failed");
 608                 return TDM_ERROR_OUT_OF_MEMORY;
 609         }
 610
 611         LIST_ADDTAIL(&cb->link, &cb_list);
 612         LIST_INITHEAD(&cb->call_link);
 613
 614         cb->object = object;
 615         cb->cb_type = cb_type;
 616         cb->cb_data = cb_data;
 617         cb->func = func;
 618         cb->user_data = user_data;
 619         cb->owner_tid = caller_tid;
 620
 621         if (tdm_debug_module & TDM_DEBUG_THREAD)
 622                 TDM_INFO("cb_type(%d) cb(%p) added", cb_type, cb);
 623
 624         return TDM_ERROR_NONE;
 625 }
 626
 627 INTERN void
 628 tdm_thread_cb_remove(void *object, tdm_thread_cb_type cb_type, void *cb_data, tdm_thread_cb func, void *user_data)
 629 {
 630         tdm_private_thread_cb *cb;
 631         pid_t caller_tid;
 632
 633         TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
 634         TDM_RETURN_IF_FAIL(object != NULL);
 635         TDM_RETURN_IF_FAIL(cb_type > 0);
 636         TDM_RETURN_IF_FAIL(func != NULL);
 637
 638         caller_tid = syscall(SYS_gettid);
 639
 640         cb = _tdm_thread_find_cb(object, cb_type, cb_data, func, user_data, caller_tid);
 641         if (!cb)
 642                 return;
 643
 644         _tdm_thread_free_cb(cb);
 645 }
 646
 647 /* when call a callback, we check both cb_base's type and cb_base's data,
 648  * because a callback is added with cb_type and cb_data.
 649  */
 650 INTERN tdm_error
 651 tdm_thread_cb_call(void *object, tdm_thread_cb_base *cb_base)
 652 {
 653         tdm_private_display *private_display = tdm_display_get();
 654         tdm_private_thread_cb *cb = NULL, *hh = NULL;
 655         int handler_in_other_thread = 0;
 656         pid_t caller_tid;
 657         struct list_head call_list;
 658         tdm_error ret;
 659
 660         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
 661         TDM_RETURN_VAL_IF_FAIL(cb_base != NULL, TDM_ERROR_INVALID_PARAMETER);
 662         TDM_RETURN_VAL_IF_FAIL(cb_base->type > 0, TDM_ERROR_INVALID_PARAMETER);
 663         TDM_RETURN_VAL_IF_FAIL(cb_base->length > 0, TDM_ERROR_INVALID_PARAMETER);
 664         TDM_RETURN_VAL_IF_FAIL(cb_base->sync == 0 || cb_base->sync == 1, TDM_ERROR_INVALID_PARAMETER);
 665         TDM_RETURN_VAL_IF_FAIL(cb_base->object_stamp > 0, TDM_ERROR_INVALID_PARAMETER);
 666
 667         caller_tid = syscall(SYS_gettid);
 668
 669         assert(find_funcs[cb_base->type] != NULL);
 670
 671         if (!object) {
 672                 object = find_funcs[cb_base->type](private_display, cb_base->object_stamp);
 673                 if (!object) {
 674                         TDM_WRN("%p gone", object);
 675                         return TDM_ERROR_NONE;
 676                 }
 677         }
 678
 679         LIST_INITHEAD(&call_list);
 680
 681         LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &cb_list, link) {
 682                 if (cb->called ||
 683                         cb->object != object ||
 684                         cb->cb_type != cb_base->type ||
 685                         cb->cb_data != cb_base->data)
 686                         continue;
 687
 688                 if (cb->owner_tid == caller_tid)
 689                         LIST_ADDTAIL(&cb->call_link, &call_list);
 690                 else
 691                         handler_in_other_thread = 1;
 692         }
 693
 694         if (!LIST_IS_EMPTY(&call_list)) {
 695                 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &call_list, call_link) {
 696                         LIST_DELINIT(&cb->call_link);
 697                         cb->called = 1;
 698                         if (tdm_debug_module & TDM_DEBUG_THREAD)
 699                                 TDM_INFO("cb_type(%d) cb(%p) called", cb->cb_type, cb);
 700                         cb->func(private_display, cb->object, cb_base, cb->user_data);
 701                 }
 702         }
 703
 704         assert(LIST_IS_EMPTY(&call_list));
 705
 706         if (!handler_in_other_thread) {
 707                 _tdm_thread_reset_cb(cb_base->type);
 708                 if (keep_private_thread) {
 709                         if (cb_base->sync) {
 710                                 pthread_cond_signal(&keep_private_thread->event_cond);
 711                                 if (tdm_debug_module & TDM_DEBUG_THREAD)
 712                                         TDM_INFO("pthread broadcase");
 713                         }
 714                 }
 715                 if (tdm_debug_module & TDM_DEBUG_THREAD)
 716                         TDM_INFO("'%s' thread_cb done(sync:%d)", tdm_cb_type_str(cb_base->type), cb_base->sync);
 717                 return TDM_ERROR_NONE;
 718         }
 719
 720         /* Once we reach here, it means that keep_private_thread is not NULL.
 721          * Just make the crash. Avoiding it is not going to help us.
 722          */
 723         ret = tdm_thread_send_cb(private_display->private_loop, cb_base);
 724         TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, TDM_ERROR_OPERATION_FAILED);
 725
 726         /* waiting until all cb are done in another thread */
 727         if (cb_base->sync) {
 728                 if (tdm_debug_module & TDM_DEBUG_THREAD)
 729                         TDM_INFO("pthread wait");
 730
 731                 /* pthread_cond_wait atomically release mutex, Upon successful return,
 732                  * the mutex shall have been locked and shall be owned by the calling thread
 733                  */
 734                 tdm_mutex_locked = 0;
 735                 pthread_cond_wait(&keep_private_thread->event_cond, &private_display->lock);
 736                 tdm_mutex_locked = 1;
 737         }
 738
 739         if (tdm_debug_module & TDM_DEBUG_THREAD)
 740                 TDM_INFO("'%s' thread_cb done(sync:%d)", tdm_cb_type_str(cb_base->type), cb_base->sync);
 741
 742         return TDM_ERROR_NONE;
 743 }