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_unlock(&cb_list_lock);
298 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &cb_list[0], link) {
299 _tdm_thread_free_cb(cb);
301 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &cb_list[1], link) {
302 _tdm_thread_free_cb(cb);
305 if (private_loop->private_thread->pipe[0] >= 0)
306 close(private_loop->private_thread->pipe[0]);
307 if (private_loop->private_thread->pipe[1] >= 0)
308 close(private_loop->private_thread->pipe[1]);
310 if (private_loop->private_thread->sub_pipe[0] >= 0)
311 close(private_loop->private_thread->sub_pipe[0]);
312 if (private_loop->private_thread->sub_pipe[1] >= 0)
313 close(private_loop->private_thread->sub_pipe[1]);
315 pthread_cond_destroy(&private_loop->private_thread->event_cond);
317 free(private_loop->private_thread);
318 private_loop->private_thread = NULL;
319 keep_private_thread = NULL;
321 TDM_INFO("Finish a TDM event thread");
325 tdm_thread_get_fd(tdm_private_loop *private_loop)
327 tdm_private_thread *private_thread;
330 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
331 TDM_RETURN_VAL_IF_FAIL(private_loop, -1);
332 TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, -1);
334 private_thread = private_loop->private_thread;
336 /* seems like ticky. but easy way to use the same APIs for both threads */
337 in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
340 return private_thread->pipe[0];
342 return private_thread->sub_pipe[0];
346 tdm_thread_send_cb(tdm_private_loop *private_loop, tdm_thread_cb_base *base)
348 tdm_private_thread *private_thread;
352 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
353 TDM_RETURN_VAL_IF_FAIL(base, TDM_ERROR_INVALID_PARAMETER);
354 TDM_RETURN_VAL_IF_FAIL(private_loop, TDM_ERROR_INVALID_PARAMETER);
355 TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, TDM_ERROR_INVALID_PARAMETER);
357 private_thread = private_loop->private_thread;
359 /* seems like ticky. but easy way to use the same APIs for both threads */
360 in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
363 pipe = private_thread->sub_pipe[1];
365 pipe = private_thread->pipe[1];
367 if (tdm_debug_module & TDM_DEBUG_THREAD)
368 TDM_INFO("fd(%d) type(%s), length(%d)", pipe, tdm_cb_type_str(base->type), base->length);
370 len = write(pipe, base, base->length);
371 if (len != base->length) {
372 TDM_ERR("write failed (%d != %d): %m", (int)len, base->length);
373 return TDM_ERROR_OPERATION_FAILED;
376 if (tdm_debug_module & TDM_DEBUG_THREAD)
377 TDM_INFO("[%s] write fd(%d) length(%d)", (in_main) ? "main" : "sub", pipe, len);
379 return TDM_ERROR_NONE;
383 tdm_thread_handle_cb(tdm_private_loop *private_loop)
385 tdm_private_thread *private_thread;
386 tdm_thread_cb_base *base;
389 int len, pipe, in_main;
390 tdm_error ret = TDM_ERROR_NONE;
392 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
393 TDM_RETURN_VAL_IF_FAIL(private_loop, TDM_ERROR_INVALID_PARAMETER);
394 TDM_RETURN_VAL_IF_FAIL(private_loop->private_thread, TDM_ERROR_INVALID_PARAMETER);
396 private_thread = private_loop->private_thread;
398 /* seems like ticky. but easy way to use the same APIs for both threads */
399 in_main = tdm_thread_in_display_thread(syscall(SYS_gettid));
402 pipe = private_thread->pipe[0];
404 pipe = private_thread->sub_pipe[0];
407 len = read(pipe, buffer, sizeof buffer);
408 } while (len < 0 && errno == EINTR);
410 if (tdm_debug_module & TDM_DEBUG_THREAD)
411 TDM_INFO("[%s] read fd(%d) length(%d)", (in_main) ? "main" : "sub", pipe, len);
414 TDM_ERR("read failed: errno(%d), len(%d) %m", errno, len);
415 return TDM_ERROR_OPERATION_FAILED;
419 return TDM_ERROR_NONE;
421 if (len < sizeof * base) {
422 TDM_ERR("read failed: len(%d)", len);
423 return TDM_ERROR_OPERATION_FAILED;
428 base = (tdm_thread_cb_base*)&buffer[i];
429 if (tdm_debug_module & TDM_DEBUG_THREAD)
430 TDM_INFO("type(%s), length(%d)", tdm_cb_type_str(base->type), base->length);
431 switch (base->type) {
432 case TDM_THREAD_CB_OUTPUT_COMMIT:
433 case TDM_THREAD_CB_OUTPUT_VBLANK:
434 case TDM_THREAD_CB_OUTPUT_STATUS:
435 case TDM_THREAD_CB_OUTPUT_DPMS:
436 case TDM_THREAD_CB_PP_DONE:
437 case TDM_THREAD_CB_CAPTURE_DONE:
438 case TDM_THREAD_CB_VBLANK_SW:
439 case TDM_THREAD_CB_VBLANK_CREATE:
440 case TDM_THREAD_CB_NEED_VALIDATE:
441 /* this event comes from other thread. so we don't need to propagate this to other thread */
442 ret = tdm_thread_cb_call(NULL, base, 0);
443 TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
451 return TDM_ERROR_NONE;
455 tdm_thread_in_display_thread(pid_t tid)
457 if (!keep_private_thread)
460 /* DON'T check TDM_MUTEX_IS_LOCKED here */
462 return (keep_private_thread->display_tid == tid) ? 1 : 0;
466 tdm_thread_is_running(void)
468 /* DON'T check TDM_MUTEX_IS_LOCKED here */
470 return (keep_private_thread) ? 1 : 0;
474 _tdm_thread_free_cb(tdm_private_thread_cb *cb)
476 if (tdm_debug_module & TDM_DEBUG_THREAD)
477 TDM_INFO("cb(%p) removed", cb);
479 assert(LIST_IS_EMPTY(&cb->call_link));
485 static tdm_private_thread_cb *
486 _tdm_thread_find_cb(struct list_head *list, void *object, tdm_thread_cb_type cb_type,
487 void *cb_data, tdm_thread_cb func, void *user_data)
489 tdm_private_thread_cb *cb = NULL;
491 LIST_FOR_EACH_ENTRY(cb, list, link) {
492 if (cb->object == object &&
493 cb->cb_type == cb_type &&
494 cb->cb_data == cb_data &&
496 cb->user_data == user_data)
504 tdm_thread_cb_set_find_func(tdm_thread_cb_type cb_type, tdm_thread_find_object func)
506 TDM_RETURN_IF_FAIL(cb_type > 0);
508 if (func && find_funcs[cb_type])
509 TDM_NEVER_GET_HERE();
511 find_funcs[cb_type] = func;
515 tdm_thread_cb_add(void *object, tdm_thread_cb_type cb_type, void *cb_data, tdm_thread_cb func, void *user_data)
517 tdm_private_thread_cb *cb = NULL;
519 struct list_head *list;
521 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
522 TDM_RETURN_VAL_IF_FAIL(object != NULL, TDM_ERROR_INVALID_PARAMETER);
523 TDM_RETURN_VAL_IF_FAIL(cb_type > 0, TDM_ERROR_INVALID_PARAMETER);
524 TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
526 caller_tid = syscall(SYS_gettid);
528 pthread_mutex_lock(&cb_list_lock);
530 if (tdm_thread_in_display_thread(caller_tid))
535 cb = _tdm_thread_find_cb(list, object, cb_type, cb_data, func, user_data);
537 pthread_mutex_unlock(&cb_list_lock);
538 TDM_ERR("can't be added twice with same data");
539 return TDM_ERROR_BAD_REQUEST;
542 cb = calloc(1, sizeof *cb);
544 pthread_mutex_unlock(&cb_list_lock);
545 TDM_ERR("calloc failed");
546 return TDM_ERROR_OUT_OF_MEMORY;
549 LIST_ADDTAIL(&cb->link, list);
550 LIST_INITHEAD(&cb->call_link);
553 cb->cb_type = cb_type;
554 cb->cb_data = cb_data;
556 cb->user_data = user_data;
557 cb->owner_tid = caller_tid;
559 if (tdm_debug_module & TDM_DEBUG_THREAD)
560 TDM_INFO("cb_type(%s) cb(%p) added", tdm_cb_type_str(cb_type), cb);
562 pthread_mutex_unlock(&cb_list_lock);
564 return TDM_ERROR_NONE;
568 tdm_thread_cb_remove(void *object, tdm_thread_cb_type cb_type, void *cb_data, tdm_thread_cb func, void *user_data)
570 tdm_private_thread_cb *cb;
571 struct list_head *list;
573 TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
574 TDM_RETURN_IF_FAIL(object != NULL);
575 TDM_RETURN_IF_FAIL(cb_type > 0);
576 TDM_RETURN_IF_FAIL(func != NULL);
578 pthread_mutex_lock(&cb_list_lock);
581 cb = _tdm_thread_find_cb(list, object, cb_type, cb_data, func, user_data);
583 _tdm_thread_free_cb(cb);
586 cb = _tdm_thread_find_cb(list, object, cb_type, cb_data, func, user_data);
588 _tdm_thread_free_cb(cb);
590 pthread_mutex_unlock(&cb_list_lock);
593 /* when call a callback, we check both cb_base's type and cb_base's data,
594 * because a callback is added with cb_type and cb_data.
597 tdm_thread_cb_call(void *object, tdm_thread_cb_base *cb_base, unsigned int propagation)
599 tdm_private_display *private_display = tdm_display_get();
600 tdm_private_thread_cb *cb = NULL, *hh = NULL;
601 int handler_in_other_thread = 0;
603 struct list_head *list, *other_list;
604 struct list_head call_list;
605 static pid_t waiting_tid = 0;
608 TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
609 TDM_RETURN_VAL_IF_FAIL(cb_base != NULL, TDM_ERROR_INVALID_PARAMETER);
610 TDM_RETURN_VAL_IF_FAIL(cb_base->type > 0, TDM_ERROR_INVALID_PARAMETER);
611 TDM_RETURN_VAL_IF_FAIL(cb_base->length > 0, TDM_ERROR_INVALID_PARAMETER);
612 TDM_RETURN_VAL_IF_FAIL(cb_base->object_stamp > 0, TDM_ERROR_INVALID_PARAMETER);
614 caller_tid = syscall(SYS_gettid);
616 assert(find_funcs[cb_base->type] != NULL);
618 if (tdm_debug_module & TDM_DEBUG_THREAD)
619 TDM_INFO("'%s' thread_cb (sync:%d, propagation:%d) ------",
620 tdm_cb_type_str(cb_base->type), cb_base->sync, propagation);
622 /* handling only output-status as sync. below logic can't handle two sync-type events */
623 if (cb_base->type == TDM_THREAD_CB_OUTPUT_STATUS)
624 assert(cb_base->sync == 1);
626 assert(cb_base->sync == 0);
629 object = find_funcs[cb_base->type](private_display, cb_base->object_stamp);
631 TDM_WRN("%p gone", object);
632 return TDM_ERROR_NONE;
636 pthread_mutex_lock(&cb_list_lock);
638 if (tdm_thread_in_display_thread(caller_tid)) {
640 other_list = &cb_list[1];
642 other_list = &cb_list[0];
646 LIST_INITHEAD(&call_list);
648 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, list, link) {
649 if (cb->object != object ||
650 cb->cb_type != cb_base->type ||
651 cb->cb_data != cb_base->data)
654 LIST_ADDTAIL(&cb->call_link, &call_list);
657 if (!LIST_IS_EMPTY(&call_list)) {
658 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, &call_list, call_link) {
659 LIST_DELINIT(&cb->call_link);
660 if (tdm_debug_module & TDM_DEBUG_THREAD)
661 TDM_INFO("cb_type(%s) cb(%p) calling", tdm_cb_type_str(cb->cb_type), cb);
662 pthread_mutex_unlock(&cb_list_lock);
663 cb->func(private_display, cb->object, cb_base, cb->user_data);
664 pthread_mutex_lock(&cb_list_lock);
668 pthread_mutex_unlock(&cb_list_lock);
671 LIST_FOR_EACH_ENTRY_SAFE(cb, hh, other_list, link) {
672 if (cb->object != object ||
673 cb->cb_type != cb_base->type ||
674 cb->cb_data != cb_base->data)
677 handler_in_other_thread = 1;
682 if (!handler_in_other_thread) {
683 if (keep_private_thread) {
684 if (cb_base->sync && waiting_tid != 0) {
686 pthread_cond_signal(&keep_private_thread->event_cond);
687 if (tdm_debug_module & TDM_DEBUG_THREAD)
688 TDM_INFO("pthread broadcase");
691 if (tdm_debug_module & TDM_DEBUG_THREAD)
692 TDM_INFO("'%s' thread_cb (sync:%d, propagation:%d) ------...",
693 tdm_cb_type_str(cb_base->type), cb_base->sync, propagation);
694 return TDM_ERROR_NONE;
697 /* Once we reach here, it means that keep_private_thread is not NULL.
698 * Just make the crash. Avoiding it is not going to help us.
700 assert(keep_private_thread != NULL);
702 ret = tdm_thread_send_cb(private_display->private_loop, cb_base);
703 TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, TDM_ERROR_OPERATION_FAILED);
705 /* waiting until all cb are done in another thread */
707 /* if waiting_tid is not 0, it means there are two sync-type events at the same time.
708 * and it would make deadlock issue.
710 assert(waiting_tid == 0);
712 if (tdm_debug_module & TDM_DEBUG_THREAD)
713 TDM_INFO("pthread wait");
715 /* pthread_cond_wait atomically release mutex, Upon successful return,
716 * the mutex shall have been locked and shall be owned by the calling thread
718 tdm_mutex_locked = 0;
719 waiting_tid = caller_tid;
720 pthread_cond_wait(&keep_private_thread->event_cond, &private_display->lock);
721 tdm_mutex_locked = 1;
724 if (tdm_debug_module & TDM_DEBUG_THREAD)
725 TDM_INFO("'%s' thread_cb (sync:%d, propagation:%d) ------...",
726 tdm_cb_type_str(cb_base->type), cb_base->sync, propagation);
728 return TDM_ERROR_NONE;