--- old/src/hotspot/share/gc/z/zLock.inline.hpp	2019-09-11 10:37:49.648651549 +0200
+++ new/src/hotspot/share/gc/z/zLock.inline.hpp	2019-09-11 10:37:49.344641547 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,27 +26,20 @@
 
 #include "gc/z/zLock.hpp"
 #include "runtime/atomic.hpp"
+#include "runtime/os.inline.hpp"
 #include "runtime/thread.hpp"
 #include "utilities/debug.hpp"
 
-inline ZLock::ZLock() {
-  pthread_mutex_init(&_lock, NULL);
-}
-
-inline ZLock::~ZLock() {
-  pthread_mutex_destroy(&_lock);
-}
-
 inline void ZLock::lock() {
-  pthread_mutex_lock(&_lock);
+  _lock.lock();
 }
 
 inline bool ZLock::try_lock() {
-  return pthread_mutex_trylock(&_lock) == 0;
+  return _lock.try_lock();
 }
 
 inline void ZLock::unlock() {
-  pthread_mutex_unlock(&_lock);
+  _lock.unlock();
 }
 
 inline ZReentrantLock::ZReentrantLock() :