Mercurial > hg > graal-compiler
view graal/com.oracle.graal.sparc/src/com/oracle/graal/sparc/SPARCScratchRegister.java @ 19904:15ef790fec92
NewObjectSnippets: work around problems with late binding of snippet parameters in GraphBuilderPlugins.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Tue, 17 Mar 2015 13:07:12 +0100 |
parents | caad1a70312d |
children |
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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 static final boolean LOG_REQUEST_STACK = false; private SPARCScratchRegister(Register register) { super(); this.register = register; } public Register getRegister() { if (locked.get() == null) { locked.set(false); } boolean isLocked = locked.get(); if (isLocked) { if (LOG_REQUEST_STACK) { where.get().printStackTrace(); } throw new RuntimeException("Temp Register is already taken!"); } else { if (LOG_REQUEST_STACK) { 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; } } }