--- /dev/null	2019-02-13 16:01:02.292000000 +0300
+++ new/src/os/bsd/vm/semaphore_bsd.hpp	2019-02-15 19:02:54.258245639 +0300
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2015, 2018, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef OS_BSD_VM_SEMAPHORE_BSD_HPP
+#define OS_BSD_VM_SEMAPHORE_BSD_HPP
+
+#ifndef __APPLE__
+// Use POSIX semaphores.
+# include "semaphore_posix.hpp"
+
+#else
+// OS X doesn't support unamed POSIX semaphores, so the implementation in os_posix.cpp can't be used.
+# include "memory/allocation.hpp"
+# include <mach/semaphore.h>
+
+class OSXSemaphore : public CHeapObj<mtInternal>{
+  semaphore_t _semaphore;
+
+  // Prevent copying and assignment.
+  OSXSemaphore(const OSXSemaphore&);
+  OSXSemaphore& operator=(const OSXSemaphore&);
+
+ public:
+  OSXSemaphore(uint value = 0);
+  ~OSXSemaphore();
+
+  void signal(uint count = 1);
+
+  void wait();
+
+  bool trywait();
+  bool timedwait(unsigned int sec, int nsec);
+
+ private:
+  static int64_t currenttime();
+};
+
+typedef OSXSemaphore SemaphoreImpl;
+
+#endif // __APPLE__
+
+#endif // OS_BSD_VM_SEMAPHORE_BSD_HPP