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109 changes: 109 additions & 0 deletions
109
substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/c/enums/CEnumRuntimeData.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| /* | ||
| * Copyright (c) 2014, 2024, 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. Oracle designates this | ||
| * particular file as subject to the "Classpath" exception as provided | ||
| * by Oracle in the LICENSE file that accompanied this code. | ||
| * | ||
| * 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.svm.core.c.enums; | ||
|
|
||
| import org.graalvm.word.SignedWord; | ||
| import org.graalvm.word.UnsignedWord; | ||
| import org.graalvm.word.WordFactory; | ||
|
|
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| import com.oracle.svm.core.Uninterruptible; | ||
| import com.oracle.svm.core.jdk.UninterruptibleUtils.CodeUtil; | ||
|
|
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| public abstract class CEnumRuntimeData { | ||
| private static final NullPointerException CACHED_NULL_EXCEPTION = new NullPointerException( | ||
| "null enum object cannot be converted to C enum integer (typically for automatic conversions on return to C code)"); | ||
|
|
||
| /** Stores the sign- or zero-extended C values (depending on the signedness of the C enum). */ | ||
| private final long[] javaToC; | ||
| private final int bytesInC; | ||
| private final boolean isCEnumTypeUnsigned; | ||
|
|
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| protected CEnumRuntimeData(long[] javaToC, int bytesInC, boolean isCEnumTypeUnsigned) { | ||
| this.javaToC = javaToC; | ||
| this.bytesInC = bytesInC; | ||
| this.isCEnumTypeUnsigned = isCEnumTypeUnsigned; | ||
| } | ||
|
|
||
| @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true) | ||
| public final boolean enumToBoolean(Enum<?> value) { | ||
| return enumToLong(value) != 0L; | ||
| } | ||
|
|
||
| @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true) | ||
| public final byte enumToByte(Enum<?> value) { | ||
| return (byte) enumToLong(value); | ||
| } | ||
|
|
||
| @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true) | ||
| public final int enumToShort(Enum<?> value) { | ||
| return (short) enumToLong(value); | ||
| } | ||
|
|
||
| @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true) | ||
| public final char enumToChar(Enum<?> value) { | ||
| return (char) CodeUtil.zeroExtend(enumToLong(value), bytesInC * Byte.SIZE); | ||
| } | ||
|
|
||
| @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true) | ||
| public final int enumToInt(Enum<?> value) { | ||
| return (int) enumToLong(value); | ||
| } | ||
|
|
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| @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true) | ||
| public final long enumToLong(Enum<?> value) { | ||
| if (value == null) { | ||
| throw CACHED_NULL_EXCEPTION; | ||
| } | ||
| return javaToC[value.ordinal()]; | ||
| } | ||
|
|
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| @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true) | ||
| public final SignedWord enumToSignedWord(Enum<?> value) { | ||
| long result = enumToLong(value); | ||
| return WordFactory.signed(result); | ||
| } | ||
|
|
||
| @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true) | ||
| public final UnsignedWord enumToUnsignedWord(Enum<?> value) { | ||
| long result = CodeUtil.zeroExtend(enumToLong(value), bytesInC * Byte.SIZE); | ||
| return WordFactory.unsigned(result); | ||
| } | ||
|
|
||
| /** | ||
| * Reduce the C value to the bits that fit into the C enum type. Then, sign- or zero-extend that | ||
| * value to 64-bit so that it can be compared to the data in the image heap. | ||
| */ | ||
| public final Enum<?> longToEnum(long rawValue) { | ||
| long lookupValue; | ||
| if (isCEnumTypeUnsigned) { | ||
| lookupValue = CodeUtil.zeroExtend(rawValue, bytesInC * Byte.SIZE); | ||
| } else { | ||
| lookupValue = CodeUtil.signExtend(rawValue, bytesInC * Byte.SIZE); | ||
| } | ||
| return lookupEnum(lookupValue); | ||
| } | ||
|
|
||
| protected abstract Enum<?> lookupEnum(long value); | ||
| } |
60 changes: 0 additions & 60 deletions
60
substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/c/enums/EnumRuntimeData.java
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