| /* | |
| * Copyright (c) 1997, 2025, 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. | |
| * | |
| */ | |
| #include "runtime/atomic.hpp" | |
| #include "suspendResume_posix.hpp" | |
| /* try to switch state from state "from" to state "to" | |
| * returns the state set after the method is complete | |
| */ | |
| SuspendResume::State SuspendResume::switch_state(SuspendResume::State from, | |
| SuspendResume::State to) | |
| { | |
| SuspendResume::State result = Atomic::cmpxchg(&_state, from, to); | |
| if (result == from) { | |
| // success | |
| return to; | |
| } | |
| return result; | |
| } |