correctly handle the degenerate barrier in the pshared case

diff --git a/src/thread/pthread_barrier_wait.c b/src/thread/pthread_barrier_wait.c
index 83c32ca35f0e7092be9fd26f8094c557ecac58b3..a97f6d56a0f3ba1eae0042cce194644557b8b763 100644 (file)
--- a/src/thread/pthread_barrier_wait.c
+++ b/src/thread/pthread_barrier_wait.c
@@ -24,7 +24,7 @@ static int pshared_barrier_wait(pthread_barrier_t *b)
        int seq;
        int ret = 0;
 
-       if (!limit) return PTHREAD_BARRIER_SERIAL_THREAD;
+       if (limit==1) return PTHREAD_BARRIER_SERIAL_THREAD;
 
        while (a_swap(&b->_b_lock, 1))
                __wait(&b->_b_lock, &b->_b_waiters, 1, 0);