1 /**************************************************************************
5 * Copyright 2015 Samsung Electronics co., Ltd. All Rights Reserved.
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>
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:
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
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.
34 **************************************************************************/
40 #include "tdm_private.h"
42 static tdm_private_thread *keep_private_thread;
44 struct _tdm_private_thread {
45 tdm_private_loop *private_loop;
47 pthread_cond_t event_cond;
48 pthread_t event_thread;
53 /* 0: read, 1: write (tdm-thread -> display-thread) */
56 /* 0: read, 1: write (tdm-thread <- display-thread) */
58 tdm_event_loop_source *sub_event_source;
61 typedef struct _tdm_private_thread_cb {
62 struct list_head link;
63 struct list_head call_link;
66 tdm_thread_cb_type cb_type;
72 } tdm_private_thread_cb;
74 static tdm_thread_find_object find_funcs[TDM_THREAD_CB_MAX] = {0, };
76 /* 0: for display thread, 1: for tdm thread */
77 static struct list_head cb_list[2];
78 static pthread_mutex_t cb_list_lock = PTHREAD_MUTEX_INITIALIZER;
80 static void _tdm_thread_free_cb(tdm_private_thread_cb *cb);
83 _tdm_thread_handle_events(int fd, tdm_event_loop_mask mask, void *user_data)
85 tdm_private_loop *private_loop = user_data;
88 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
89 TDM_RETURN_VAL_IF_FAIL(private_loop != NULL, TDM_ERROR_OPERATION_FAILED);
90 TDM_RETURN_VAL_IF_FAIL(private_loop->dpy != NULL, TDM_ERROR_OPERATION_FAILED);
92 ret = tdm_thread_handle_cb(private_loop);
94 TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, ret);
96 return TDM_ERROR_NONE;
100 _tdm_thread_main(void *data)
102 tdm_private_thread *private_thread = (tdm_private_thread*)data;
103 tdm_private_loop *private_loop = private_thread->private_loop;
109 /* Not lock/unlock for the private_thread and private_loop structure
110 * because they won't be destroyed as long as tdm thread is running.
111 * When they're destroyed, we have already exit the tdm thread.
113 private_thread->thread_tid = syscall(SYS_gettid);
115 TDM_INFO("display_tid:%d, thread_tid: %d",
116 private_thread->display_tid, private_thread->thread_tid);
118 /* fd SHOULD be the same with sub_pipe[0] to make sure that using
119 * tdm_thread_get_fd, tdm_thread_send_cb, tdm_thread_handle_cb in
120 * both threads is fine. Otherwise, assert.
122 tdm_display_lock(private_loop->dpy);
123 assert(tdm_thread_get_fd(private_loop) == private_thread->sub_pipe[0]);
125 private_thread->sub_event_source =
126 tdm_event_loop_add_fd_handler(private_loop->dpy,
127 private_thread->sub_pipe[0],
128 TDM_EVENT_LOOP_READABLE,
129 _tdm_thread_handle_events,
132 TDM_GOTO_IF_FAIL(error == TDM_ERROR_NONE, exit_thread);
133 TDM_GOTO_IF_FAIL(private_thread->sub_event_source != NULL, exit_thread);
135 pthread_cond_signal(&private_thread->event_cond);
137 /* mutex shall be locked by the thread calling pthread_cond_signal() */
138 tdm_display_unlock(private_loop->dpy);
140 fd = tdm_event_loop_get_fd(private_loop->dpy);
142 TDM_ERR("couldn't get fd");
151 if (tdm_debug_module & TDM_DEBUG_EVENT)
152 TDM_INFO("server flush");
153 tdm_event_loop_flush(private_loop->dpy);
155 if (tdm_debug_module & TDM_DEBUG_EVENT)
156 TDM_INFO("fd(%d) polling in", fd);
158 ret = poll(&fds, 1, -1);
160 if (tdm_debug_module & TDM_DEBUG_EVENT)
161 TDM_INFO("fd(%d) polling out", fd);
164 if (errno == EINTR || errno == EAGAIN) /* normal case */
167 TDM_ERR("poll failed: %m");
172 if (tdm_debug_module & TDM_DEBUG_EVENT)
173 TDM_INFO("thread got events");
175 if (tdm_event_loop_dispatch(private_loop->dpy) < 0)
176 TDM_ERR("dispatch error");
180 tdm_display_unlock(private_loop->dpy);
184 /* NOTE: tdm thread doesn't care about multi-thread. */
186 tdm_thread_init(tdm_private_loop *private_loop)
188 tdm_private_display *private_display;
189 tdm_private_thread *private_thread;
192 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
193 TDM_RETURN_VAL_IF_FAIL(private_loop->dpy, TDM_ERROR_OPERATION_FAILED);
195 private_display = private_loop->dpy;
196 TDM_RETURN_VAL_IF_FAIL(private_display->private_loop, TDM_ERROR_OPERATION_FAILED);
198 if (private_loop->private_thread)
199 return TDM_ERROR_NONE;
201 for (i = 0; i < TDM_THREAD_CB_MAX; i++)
202 find_funcs[i] = NULL;
204 LIST_INITHEAD(&cb_list[0]);
205 LIST_INITHEAD(&cb_list[1]);
207 /* enable as default */
208 thread = tdm_config_get_int(TDM_CONFIG_KEY_GENERAL_THREAD, 1);
210 TDM_INFO("not using a TDM event thread");
211 return TDM_ERROR_NONE;
214 private_thread = calloc(1, sizeof * private_thread);
215 if (!private_thread) {
216 TDM_ERR("alloc failed");
217 return TDM_ERROR_OUT_OF_MEMORY;
220 if (pthread_cond_init(&private_thread->event_cond, NULL)) {
221 TDM_ERR("pthread_cond_init failed: %m");
222 free(private_thread);
223 return TDM_ERROR_OUT_OF_MEMORY;
226 if (pipe(private_thread->pipe) != 0) {
227 TDM_ERR("pipe failed: %m");
228 pthread_cond_destroy(&private_thread->event_cond);
229 free(private_thread);
230 return TDM_ERROR_OPERATION_FAILED;
233 if (pipe(private_thread->sub_pipe) != 0) {
234 TDM_ERR("sub_pipe failed: %m");
235 close(private_thread->pipe[0]);
236 close(private_thread->pipe[1]);
237 pthread_cond_destroy(&private_thread->event_cond);
238 free(private_thread);
239 return TDM_ERROR_OPERATION_FAILED;
242 keep_private_thread = private_thread;
244 private_thread->private_loop = private_loop;
245 private_loop->private_thread = private_thread;
247 private_thread->display_tid = syscall(SYS_gettid);
249 /* pthread_cond_wait atomically release mutex, Upon successful return,
250 * the mutex shall have been locked and shall be owned by the calling thread
252 tdm_mutex_locked = 0;
253 pthread_create(&private_thread->event_thread, NULL, _tdm_thread_main,
256 /* wait until the tdm thread starts */
257 pthread_cond_wait(&private_thread->event_cond, &private_display->lock);
258 tdm_mutex_locked = 1;
260 TDM_INFO("using a TDM event thread. pipe(%d,%d) sub_pipe(%d,%d)",
261 private_thread->pipe[0], private_thread->pipe[1],
262 private_thread->sub_pipe[0], private_thread->sub_pipe[1]);
264 return TDM_ERROR_NONE;
268 tdm_thread_deinit(tdm_private_loop *private_loop)
270 tdm_private_display *private_display;
271 tdm_private_thread_cb *cb = NULL, *hh = NULL;
274 TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
276 for (i = 0; i < TDM_THREAD_CB_MAX; i++)
277 find_funcs[i] = NULL;
279 if (!private_loop->private_thread)
282 if (private_loop->private_thread->sub_event_source)
283 tdm_event_loop_source_remove(private_loop->private_thread->sub_event_source);
285 pthread_cancel(private_loop->private_thread->event_thread);
287 private_display = private_loop->dpy;
289 /* before falling into the block of pthread_join, we have to unlock the mutex
290 * for subthread to use the mutex.
292 _pthread_mutex_unlock(&private_display->lock);
293 pthread_join(private_loop->private_thread->event_thread, NULL);
295 pthread_mutex_trylock(&cb_list_lock);
296 pthread_mutex_unlock(&cb_list_lock);
299 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &cb_list[0], link) {
300 _tdm_thread_free_cb(cb);
302 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &cb_list[1], link) {
303 _tdm_thread_free_cb(cb);
306 if (private_loop->private_thread->pipe[0] >= 0)
307 close(private_loop->private_thread->pipe[0]);
308 if (private_loop->private_thread->pipe[1] >= 0)
309 close(private_loop->private_thread->pipe[1]);
311 if (private_loop->private_thread->sub_pipe[0] >= 0)
312 close(private_loop->private_thread->sub_pipe[0]);
313 if (private_loop->private_thread->sub_pipe[1] >= 0)
314 close(private_loop->private_thread->sub_pipe[1]);
316 pthread_cond_destroy(&private_loop->private_thread->event_cond);
318 free(private_loop->private_thread);
319 private_loop->private_thread = NULL;
320 keep_private_thread = NULL;
322 TDM_INFO("Finish a TDM event thread");
326 tdm_thread_get_fd(tdm_private_loop *private_loop)
328 tdm_private_thread *private_thread;
331 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
332 TDM_RETURN_VAL_IF_FAIL(private_loop, -1);
333 TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, -1);
335 private_thread = private_loop->private_thread;
337 /* seems like ticky. but easy way to use the same APIs for both threads */
338 in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
341 return private_thread->pipe[0];
343 return private_thread->sub_pipe[0];
347 tdm_thread_send_cb(tdm_private_loop *private_loop, tdm_thread_cb_base *base)
349 tdm_private_thread *private_thread;
353 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
354 TDM_RETURN_VAL_IF_FAIL(base, TDM_ERROR_INVALID_PARAMETER);
355 TDM_RETURN_VAL_IF_FAIL(private_loop, TDM_ERROR_INVALID_PARAMETER);
356 TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, TDM_ERROR_INVALID_PARAMETER);
358 private_thread = private_loop->private_thread;
360 /* seems like ticky. but easy way to use the same APIs for both threads */
361 in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
364 pipe = private_thread->sub_pipe[1];
366 pipe = private_thread->pipe[1];
368 if (tdm_debug_module & TDM_DEBUG_THREAD)
369 TDM_INFO("fd(%d) type(%s), length(%d)", pipe, tdm_cb_type_str(base->type), base->length);
371 len = write(pipe, base, base->length);
372 if (len != base->length) {
373 TDM_ERR("write failed (%d != %d): %m", (int)len, base->length);
374 return TDM_ERROR_OPERATION_FAILED;
377 if (tdm_debug_module & TDM_DEBUG_THREAD)
378 TDM_INFO("[%s] write fd(%d) length(%d)", (in_main) ? "main" : "sub", pipe, len);
380 return TDM_ERROR_NONE;
384 tdm_thread_handle_cb(tdm_private_loop *private_loop)
386 tdm_private_thread *private_thread;
387 tdm_thread_cb_base *base;
390 int len, pipe, in_main;
391 tdm_error ret = TDM_ERROR_NONE;
393 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
394 TDM_RETURN_VAL_IF_FAIL(private_loop, TDM_ERROR_INVALID_PARAMETER);
395 TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, TDM_ERROR_INVALID_PARAMETER);
397 private_thread = private_loop->private_thread;
399 /* seems like ticky. but easy way to use the same APIs for both threads */
400 in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
403 pipe = private_thread->pipe[0];
405 pipe = private_thread->sub_pipe[0];
408 len = read(pipe, buffer, sizeof buffer);
409 } while (len < 0 && errno == EINTR);
411 if (tdm_debug_module & TDM_DEBUG_THREAD)
412 TDM_INFO("[%s] read fd(%d) length(%d)", (in_main) ? "main" : "sub", pipe, len);
415 TDM_ERR("read failed: errno(%d), len(%d) %m", errno, len);
416 return TDM_ERROR_OPERATION_FAILED;
420 return TDM_ERROR_NONE;
422 if (len < sizeof * base) {
423 TDM_ERR("read failed: len(%d)", len);
424 return TDM_ERROR_OPERATION_FAILED;
429 base = (tdm_thread_cb_base*)&buffer[i];
430 if (tdm_debug_module & TDM_DEBUG_THREAD)
431 TDM_INFO("type(%s), length(%d)", tdm_cb_type_str(base->type), base->length);
432 switch (base->type) {
433 case TDM_THREAD_CB_OUTPUT_COMMIT:
434 case TDM_THREAD_CB_OUTPUT_VBLANK:
435 case TDM_THREAD_CB_OUTPUT_STATUS:
436 case TDM_THREAD_CB_OUTPUT_DPMS:
437 case TDM_THREAD_CB_PP_DONE:
438 case TDM_THREAD_CB_CAPTURE_DONE:
439 case TDM_THREAD_CB_VBLANK_SW:
440 case TDM_THREAD_CB_VBLANK_CREATE:
441 case TDM_THREAD_CB_NEED_VALIDATE:
442 /* this event comes from other thread. so we don't need to propagate this to other thread */
443 ret = tdm_thread_cb_call(NULL, base, 0);
444 TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
452 return TDM_ERROR_NONE;
456 tdm_thread_in_display_thread(pid_t tid)
458 if (!keep_private_thread)
461 /* DON'T check TDM_MUTEX_IS_LOCKED here */
463 return (keep_private_thread->display_tid == tid) ? 1 : 0;
467 tdm_thread_is_running(void)
469 /* DON'T check TDM_MUTEX_IS_LOCKED here */
471 return (keep_private_thread) ? 1 : 0;
475 _tdm_thread_free_cb(tdm_private_thread_cb *cb)
477 if (tdm_debug_module & TDM_DEBUG_THREAD)
478 TDM_INFO("cb(%p) removed", cb);
480 assert(LIST_IS_EMPTY(&cb->call_link));
486 static tdm_private_thread_cb *
487 _tdm_thread_find_cb(struct list_head *list, void *object, tdm_thread_cb_type cb_type,
488 void *cb_data, tdm_thread_cb func, void *user_data)
490 tdm_private_thread_cb *cb = NULL;
492 LIST_FOR_EACH_ENTRY(cb, list, link) {
493 if (cb->object == object &&
494 cb->cb_type == cb_type &&
495 cb->cb_data == cb_data &&
497 cb->user_data == user_data)
505 tdm_thread_cb_set_find_func(tdm_thread_cb_type cb_type, tdm_thread_find_object func)
507 TDM_RETURN_IF_FAIL(cb_type > 0);
509 if (func && find_funcs[cb_type])
510 TDM_NEVER_GET_HERE();
512 find_funcs[cb_type] = func;
516 tdm_thread_cb_add(void *object, tdm_thread_cb_type cb_type, void *cb_data, tdm_thread_cb func, void *user_data)
518 tdm_private_thread_cb *cb = NULL;
520 struct list_head *list;
522 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
523 TDM_RETURN_VAL_IF_FAIL(object != NULL, TDM_ERROR_INVALID_PARAMETER);
524 TDM_RETURN_VAL_IF_FAIL(cb_type > 0, TDM_ERROR_INVALID_PARAMETER);
525 TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
527 caller_tid = syscall(SYS_gettid);
529 pthread_mutex_lock(&cb_list_lock);
531 if (tdm_thread_in_display_thread(caller_tid))
536 cb = _tdm_thread_find_cb(list, object, cb_type, cb_data, func, user_data);
538 pthread_mutex_unlock(&cb_list_lock);
539 TDM_ERR("can't be added twice with same data");
540 return TDM_ERROR_BAD_REQUEST;
543 cb = calloc(1, sizeof *cb);
545 pthread_mutex_unlock(&cb_list_lock);
546 TDM_ERR("calloc failed");
547 return TDM_ERROR_OUT_OF_MEMORY;
550 LIST_ADDTAIL(&cb->link, list);
551 LIST_INITHEAD(&cb->call_link);
554 cb->cb_type = cb_type;
555 cb->cb_data = cb_data;
557 cb->user_data = user_data;
558 cb->owner_tid = caller_tid;
560 if (tdm_debug_module & TDM_DEBUG_THREAD)
561 TDM_INFO("cb_type(%s) cb(%p) added", tdm_cb_type_str(cb_type), cb);
563 pthread_mutex_unlock(&cb_list_lock);
565 return TDM_ERROR_NONE;
569 tdm_thread_cb_remove(void *object, tdm_thread_cb_type cb_type, void *cb_data, tdm_thread_cb func, void *user_data)
571 tdm_private_thread_cb *cb;
572 struct list_head *list;
574 TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
575 TDM_RETURN_IF_FAIL(object != NULL);
576 TDM_RETURN_IF_FAIL(cb_type > 0);
577 TDM_RETURN_IF_FAIL(func != NULL);
579 pthread_mutex_lock(&cb_list_lock);
582 cb = _tdm_thread_find_cb(list, object, cb_type, cb_data, func, user_data);
584 _tdm_thread_free_cb(cb);
587 cb = _tdm_thread_find_cb(list, object, cb_type, cb_data, func, user_data);
589 _tdm_thread_free_cb(cb);
591 pthread_mutex_unlock(&cb_list_lock);
594 /* when call a callback, we check both cb_base's type and cb_base's data,
595 * because a callback is added with cb_type and cb_data.
598 tdm_thread_cb_call(void *object, tdm_thread_cb_base *cb_base, unsigned int propagation)
600 tdm_private_display *private_display = tdm_display_get();
601 tdm_private_thread_cb *cb = NULL, *hh = NULL;
602 int handler_in_other_thread = 0;
604 struct list_head *list, *other_list;
605 struct list_head call_list;
606 static pid_t waiting_tid = 0;
609 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
610 TDM_RETURN_VAL_IF_FAIL(cb_base != NULL, TDM_ERROR_INVALID_PARAMETER);
611 TDM_RETURN_VAL_IF_FAIL(cb_base->type > 0, TDM_ERROR_INVALID_PARAMETER);
612 TDM_RETURN_VAL_IF_FAIL(cb_base->length > 0, TDM_ERROR_INVALID_PARAMETER);
613 TDM_RETURN_VAL_IF_FAIL(cb_base->object_stamp > 0, TDM_ERROR_INVALID_PARAMETER);
615 caller_tid = syscall(SYS_gettid);
617 assert(find_funcs[cb_base->type] != NULL);
619 if (tdm_debug_module & TDM_DEBUG_THREAD)
620 TDM_INFO("'%s' thread_cb (sync:%d, propagation:%d) ------",
621 tdm_cb_type_str(cb_base->type), cb_base->sync, propagation);
623 /* handling only output-status as sync. below logic can't handle two sync-type events */
624 if (cb_base->type == TDM_THREAD_CB_OUTPUT_STATUS)
625 assert(cb_base->sync == 1);
627 assert(cb_base->sync == 0);
630 object = find_funcs[cb_base->type](private_display, cb_base->object_stamp);
632 TDM_WRN("%p gone", object);
633 return TDM_ERROR_NONE;
637 pthread_mutex_lock(&cb_list_lock);
639 if (tdm_thread_in_display_thread(caller_tid)) {
641 other_list = &cb_list[1];
643 other_list = &cb_list[0];
647 LIST_INITHEAD(&call_list);
649 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, list, link) {
650 if (cb->object != object ||
651 cb->cb_type != cb_base->type ||
652 cb->cb_data != cb_base->data)
655 LIST_ADDTAIL(&cb->call_link, &call_list);
658 if (!LIST_IS_EMPTY(&call_list)) {
659 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &call_list, call_link) {
660 LIST_DELINIT(&cb->call_link);
661 if (tdm_debug_module & TDM_DEBUG_THREAD)
662 TDM_INFO("cb_type(%s) cb(%p) calling", tdm_cb_type_str(cb->cb_type), cb);
663 pthread_mutex_unlock(&cb_list_lock);
664 cb->func(private_display, cb->object, cb_base, cb->user_data);
665 pthread_mutex_lock(&cb_list_lock);
669 pthread_mutex_unlock(&cb_list_lock);
672 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, other_list, link) {
673 if (cb->object != object ||
674 cb->cb_type != cb_base->type ||
675 cb->cb_data != cb_base->data)
678 handler_in_other_thread = 1;
683 if (!handler_in_other_thread) {
684 if (keep_private_thread) {
685 if (cb_base->sync && waiting_tid != 0) {
687 pthread_cond_signal(&keep_private_thread->event_cond);
688 if (tdm_debug_module & TDM_DEBUG_THREAD)
689 TDM_INFO("pthread broadcase");
692 if (tdm_debug_module & TDM_DEBUG_THREAD)
693 TDM_INFO("'%s' thread_cb (sync:%d, propagation:%d) ------...",
694 tdm_cb_type_str(cb_base->type), cb_base->sync, propagation);
695 return TDM_ERROR_NONE;
698 /* Once we reach here, it means that keep_private_thread is not NULL.
699 * Just make the crash. Avoiding it is not going to help us.
701 assert(keep_private_thread != NULL);
703 ret = tdm_thread_send_cb(private_display->private_loop, cb_base);
704 TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, TDM_ERROR_OPERATION_FAILED);
706 /* waiting until all cb are done in another thread */
708 /* if waiting_tid is not 0, it means there are two sync-type events at the same time.
709 * and it would make deadlock issue.
711 assert(waiting_tid == 0);
713 if (tdm_debug_module & TDM_DEBUG_THREAD)
714 TDM_INFO("pthread wait");
716 /* pthread_cond_wait atomically release mutex, Upon successful return,
717 * the mutex shall have been locked and shall be owned by the calling thread
719 tdm_mutex_locked = 0;
720 waiting_tid = caller_tid;
721 pthread_cond_wait(&keep_private_thread->event_cond, &private_display->lock);
722 tdm_mutex_locked = 1;
725 if (tdm_debug_module & TDM_DEBUG_THREAD)
726 TDM_INFO("'%s' thread_cb (sync:%d, propagation:%d) ------...",
727 tdm_cb_type_str(cb_base->type), cb_base->sync, propagation);
729 return TDM_ERROR_NONE;