[PATCH 2/2] Use _umtx_op for futex on FreeBSD

["Alex Xu \(Hello71\) via lttng-dev" <lttng-dev@lists.lttng.org>]

---
 include/urcu/futex.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/include/urcu/futex.h b/include/urcu/futex.h
index c206c6f..33dc3db 100644
--- a/include/urcu/futex.h
+++ b/include/urcu/futex.h
@@ -24,6 +24,7 @@
  */
 
 #include <urcu/config.h>
+#include <errno.h>
 #include <stdint.h>
 #include <time.h>
 
@@ -103,6 +104,28 @@ static inline int futex_async(int32_t *uaddr, int op, int32_t val,
 	return ret;
 }
 
+#elif defined(__FreeBSD__)
+
+#include <sys/umtx.h>
+
+static inline int futex_noasync(int32_t *uaddr, int op, int32_t val,
+		const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
+{
+	return futex_async(uaddr, op, val, timeout, uaddr2, val3);
+}
+
+static inline int futex_async(int32_t *uaddr, int op, int32_t val,
+		const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
+{
+	switch (op) {
+		case FUTEX_WAIT: op = UMTX_OP_WAIT_UINT; break;
+		case FUTEX_WAKE: op = UMTX_OP_WAKE; break;
+		default: errno = EINVAL; return -1;
+	}
+	return _umtx_op(uaddr, op, val,
+                (void *)sizeof(*timeout), (void *)timeout);
+}
+
 #elif defined(__CYGWIN__)
 
 /*
-- 
2.25.0