Sourceware Bugzilla – Attachment 11457 Details for
Bug 23844
pthread_rwlock_trywrlock results in hang
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[patch]
patch for tryrdlock function
tryrdlock.patch (text/plain), 840 bytes, created by
Rik Prohaska
on 2018-12-12 15:49:09 UTC
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Description:
patch for tryrdlock function
Filename:
MIME Type:
Creator:
Rik Prohaska
Created:
2018-12-12 15:49:09 UTC
Size:
840 bytes
patch
obsolete
>diff --git a/nptl/pthread_rwlock_tryrdlock.c b/nptl/pthread_rwlock_tryrdlock.c >index 4aec1fc15a..6bee2188cc 100644 >--- a/nptl/pthread_rwlock_tryrdlock.c >+++ b/nptl/pthread_rwlock_tryrdlock.c >@@ -102,7 +102,13 @@ __pthread_rwlock_tryrdlock (pthread_rwlock_t *rwlock) > overwrite the value set by the most recent writer (or the readers > before it in case of explicit hand-over) and we know that there > are no waiting readers. */ >- atomic_store_relaxed (&rwlock->__data.__wrphase_futex, 0); >+ /* TODO update above comment */ >+ if ((atomic_exchange_relaxed (&rwlock->__data.__wrphase_futex, 0) >+ & PTHREAD_RWLOCK_FUTEX_USED) != 0) >+ { >+ int private = __pthread_rwlock_get_private (rwlock); >+ futex_wake (&rwlock->__data.__wrphase_futex, INT_MAX, private); >+ } > } > > return 0;
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