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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/ConditionProfile.java @ 16828:2834af86f398
Truffle: new condition profile primitives.
author | Christian Humer <christian.humer@gmail.com> |
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date | Wed, 13 Aug 2014 20:44:36 +0200 |
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children | 3c114b3e08c3 |
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Truffle: new condition profile primitives.
Christian Humer <christian.humer@gmail.com>
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1 /* |
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api.utilities; |
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26 |
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27 /** |
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28 * Abstract utility class to speculate on conditions. Condition profiles are intended to be used as |
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29 * part of if conditions. |
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30 * |
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31 * Example usage: |
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32 * |
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33 * <pre> |
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34 * private final ConditionProfile zero = ...; |
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35 * |
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36 * int value = ...; |
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37 * if (zero.profile(value == 0)) { |
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38 * return 0; |
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39 * } else { |
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40 * return value; |
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41 * } |
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42 * |
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43 * </pre> |
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44 * |
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45 * @see BooleanConditionProfile |
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46 * @see IntegerConditionProfile |
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47 */ |
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48 public abstract class ConditionProfile { |
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49 |
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50 public abstract boolean profile(boolean value); |
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51 |
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52 } |