88    struct rwlock_thread_info* q;  in DRD_()  local
91    for ( ; (q = VG_(OSetGen_Next)(p->thread_info)) != 0; )  in DRD_()
93       return q->reader_nesting_count > 0;  in DRD_()
100    struct rwlock_thread_info* q;  in DRD_()  local
103    for ( ; (q = VG_(OSetGen_Next)(p->thread_info)) != 0; )  in DRD_()
105       return q->writer_nesting_count > 0;  in DRD_()
119    struct rwlock_thread_info* q;  in DRD_()  local
121    q = VG_(OSetGen_Lookup)(p->thread_info, &uword_tid);  in DRD_()
122    return q && q->reader_nesting_count > 0;  in DRD_()
129    struct rwlock_thread_info* q;  in DRD_()  local
131    q = VG_(OSetGen_Lookup)(p->thread_info, &uword_tid);  in DRD_()
132    return q && q->writer_nesting_count > 0;  in DRD_()
147    struct rwlock_thread_info* q;  in DRD_()  local
149    q = VG_(OSetGen_Lookup)(oset, &tid);  in DRD_()
150    if (q == 0)  in DRD_()
152       q = VG_(OSetGen_AllocNode)(oset, sizeof(*q));  in DRD_()
153       q->tid                       = tid;  in DRD_()
154       q->reader_nesting_count      = 0;  in DRD_()
155       q->writer_nesting_count      = 0;  in DRD_()
156       q->latest_wrlocked_segment   = 0;  in DRD_()
157       q->latest_rdlocked_segment   = 0;  in DRD_()
158       VG_(OSetGen_Insert)(oset, q);  in DRD_()
160    tl_assert(q);  in DRD_()
161    return q;  in DRD_()
172    struct rwlock_thread_info* q;  in DRD_()  local
177    for ( ; (q = VG_(OSetGen_Next)(p->thread_info)) != 0; )  in DRD_()
179       if (q->tid != tid)  in DRD_()
181          if (q->latest_wrlocked_segment)  in DRD_()
184                              &q->latest_wrlocked_segment->vc);  in DRD_()
186          if (readers_too && q->latest_rdlocked_segment)  in DRD_()
189                              &q->latest_rdlocked_segment->vc);  in DRD_()
249    struct rwlock_thread_info* q;  in rwlock_cleanup()  local
272    for ( ; (q = VG_(OSetGen_Next)(p->thread_info)) != 0; )  in rwlock_cleanup()
274       DRD_(sg_put)(q->latest_wrlocked_segment);  in rwlock_cleanup()
275       DRD_(sg_put)(q->latest_rdlocked_segment);  in rwlock_cleanup()
421    struct rwlock_thread_info* q;  in DRD_()  local
438    q = DRD_(lookup_or_insert_node)(p->thread_info, drd_tid);  in DRD_()
439    if (++q->reader_nesting_count == 1)  in DRD_()
496    struct rwlock_thread_info* q;  in DRD_()  local
511    q = DRD_(lookup_or_insert_node)(p->thread_info,  in DRD_()
513    tl_assert(q->writer_nesting_count == 0);  in DRD_()
514    q->writer_nesting_count++;  in DRD_()
515    tl_assert(q->writer_nesting_count == 1);  in DRD_()
538    struct rwlock_thread_info* q;  in DRD_()  local
575    q = DRD_(lookup_or_insert_node)(p->thread_info, drd_tid);  in DRD_()
576    tl_assert(q);  in DRD_()
577    if (q->reader_nesting_count > 0)  in DRD_()
579       q->reader_nesting_count--;  in DRD_()
580       if (q->reader_nesting_count == 0 && DRD_(s_shared_threshold_ms) > 0)  in DRD_()
595       if (q->reader_nesting_count == 0 && q->writer_nesting_count == 0)  in DRD_()
602          DRD_(thread_get_latest_segment)(&q->latest_rdlocked_segment, drd_tid);  in DRD_()
607    else if (q->writer_nesting_count > 0)  in DRD_()
609       q->writer_nesting_count--;  in DRD_()
610       if (q->writer_nesting_count == 0 && DRD_(s_exclusive_threshold_ms) > 0)  in DRD_()
626       if (q->reader_nesting_count == 0 && q->writer_nesting_count == 0)  in DRD_()
633          DRD_(thread_get_latest_segment)(&q->latest_wrlocked_segment, drd_tid);  in DRD_()
648    struct rwlock_thread_info* q;  in rwlock_delete_thread()  local
658       q = DRD_(lookup_or_insert_node)(p->thread_info, tid);  in rwlock_delete_thread()
659       q->reader_nesting_count = 0;  in rwlock_delete_thread()
660       q->writer_nesting_count = 0;  in rwlock_delete_thread()