Mercurial > hg > truffle
view graal/com.oracle.graal.sparc/src/com/oracle/graal/sparc/SPARCScratchRegister.java @ 18163:c88ab4f1f04a
re-enabled Checkstyle with the release of 6.0 that supports Java 8; fixed existing Checkstyle warnings
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 24 Oct 2014 16:18:10 +0200 |
parents | 4f8c81b1d1cb |
children | caad1a70312d |
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/* * Copyright (c) 2013, 2014, 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. */ package com.oracle.graal.sparc; import com.oracle.graal.api.code.*; public final class SPARCScratchRegister implements AutoCloseable { private final ThreadLocal<Boolean> locked = new ThreadLocal<>(); private final ThreadLocal<Exception> where = new ThreadLocal<>(); private final Register register; private static final SPARCScratchRegister scratch1 = new SPARCScratchRegister(SPARC.g3); private static final SPARCScratchRegister scratch2 = new SPARCScratchRegister(SPARC.g1); private SPARCScratchRegister(Register register) { super(); this.register = register; } public Register getRegister() { if (locked.get() == null) { locked.set(false); } boolean isLocked = locked.get(); if (isLocked) { where.get().printStackTrace(); throw new RuntimeException("Temp Register is already taken!"); } else { where.set(new Exception()); locked.set(true); return register; } } public void close() { boolean isLocked = locked.get(); if (isLocked) { locked.set(false); } else { throw new RuntimeException("Temp Register is not taken!"); } } public static SPARCScratchRegister get() { if (scratch1.isLocked()) { return scratch2; } else { return scratch1; } } public boolean isLocked() { Boolean isLocked = locked.get(); if (isLocked == null) { return false; } else { return isLocked; } } }