From f35c900c0b51e1d50e67c3b9383f8b0f44ecc570 Mon Sep 17 00:00:00 2001
From: Chris Cannam <cannam@all-day-breakfast.com>
Date: Thu, 11 Oct 2018 13:00:58 +0100
Subject: [PATCH] OSX memory barrier bit

---
 src/system/sysutils.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/system/sysutils.h b/src/system/sysutils.h
index b63c640..3f76938 100644
--- a/src/system/sysutils.h
+++ b/src/system/sysutils.h
@@ -135,8 +135,12 @@ extern void system_memorybarrier();
 #define MUNLOCK_SAMPLEBLOCK(a) do { if (!(a).empty()) { const float &b = *(a).begin(); MUNLOCK(&b, (a).capacity() * sizeof(float)); } } while(0);
 
 #ifdef __APPLE__
+#if defined __MAC_10_12
+#define MBARRIER() __sync_synchronize()
+#else
 #include <libkern/OSAtomic.h>
 #define MBARRIER() OSMemoryBarrier()
+#endif
 #else
 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
 #define MBARRIER() __sync_synchronize()