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condition variable signal/bcast need not wake unless there are waiters
[musl]
/
src
/
thread
/
pthread_cond_signal.c
diff --git
a/src/thread/pthread_cond_signal.c
b/src/thread/pthread_cond_signal.c
index
574f5c7
..
a021128
100644
(file)
--- a/
src/thread/pthread_cond_signal.c
+++ b/
src/thread/pthread_cond_signal.c
@@
-2,7
+2,7
@@
int pthread_cond_signal(pthread_cond_t *c)
{
-
c->_c_block = 0
;
- __wake(&c->_c_block, 1, 0);
+
if (a_swap(&c->_c_block, 0))
;
+
__wake(&c->_c_block, 1, 0);
return 0;
}