if returning errno value directly from a syscall, we need to negate it.

[musl] / src / thread / __timedwait.c

diff --git a/src/thread/__timedwait.c b/src/thread/__timedwait.c
index b38ea99..28b777b 100644 (file)
--- a/src/thread/__timedwait.c
+++ b/src/thread/__timedwait.c
@@ -17,7 +17,7 @@ int __timedwait(volatile int *addr, int val, clockid_t clk, const struct timespe
                if (to.tv_sec < 0) return ETIMEDOUT;
        }
        if (priv) priv = 128; priv=0;
-       r = __syscall(__NR_futex, (long)addr, FUTEX_WAIT | priv, val, at ? (long)&to : 0);
+       r = -__syscall(__NR_futex, (long)addr, FUTEX_WAIT | priv, val, at ? (long)&to : 0);
        if (r == ETIMEDOUT) return r;
        return 0;
 }