1/*
2 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#ifndef OS_LINUX_WAITBARRIER_LINUX_HPP
26#define OS_LINUX_WAITBARRIER_LINUX_HPP
27
28#include "memory/allocation.hpp"
29
30class LinuxWaitBarrier : public CHeapObj<mtInternal> {
31 volatile int _futex_barrier;
32
33 // Prevent copying and assignment of LinuxWaitBarrier instances.
34 LinuxWaitBarrier(const LinuxWaitBarrier&);
35 LinuxWaitBarrier& operator=(const LinuxWaitBarrier&);
36
37 public:
38 LinuxWaitBarrier() : _futex_barrier(0) {};
39 ~LinuxWaitBarrier() {};
40
41 const char* description() { return "futex"; }
42
43 void arm(int barrier_tag);
44 void disarm();
45 void wait(int barrier_tag);
46};
47
48#endif // OS_LINUX_WAITBARRIER_LINUX_HPP
49