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fix logic for when wakeup is not desired on cond bcast 

somehow i forgot that normal-type mutexes don't store the owner tid.
This commit is contained in:
Rich Felker 2011-09-25 02:56:01 -04:00
parent cba4e1c0a3
commit 09ec0f3aab
1 changed files with 4 additions and 3 deletions
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7
src/thread/pthread_cond_broadcast.c
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@ -37,10 +37,11 @@ int pthread_cond_broadcast(pthread_cond_t *c)
a_fetch_add(&m->_m_waiters, -w); a_fetch_add(&m->_m_waiters, -w);
} }
/* Perform the futex requeue, waking one waiter if and only if /* Perform the futex requeue, waking one waiter unless we know
* the calling thread does not hold the mutex. */ * that the calling thread holds the mutex. */
__syscall(SYS_futex, &c->_c_block, FUTEX_REQUEUE, __syscall(SYS_futex, &c->_c_block, FUTEX_REQUEUE,
m->_m_lock!=pthread_self()->tid, INT_MAX, &m->_m_lock); !m->_m_type || (m->_m_lock&INT_MAX)!=pthread_self()->tid,
INT_MAX, &m->_m_lock);
unlock(c); unlock(c);
return 0; return 0;