| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.google.devtools.build.lib.skyframe; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.Interner; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.concurrent.BlazeInterners; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe; |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec; |
| import com.google.devtools.build.skyframe.AbstractSkyKey; |
| import com.google.devtools.build.skyframe.SkyFunctionName; |
| import com.google.devtools.build.skyframe.SkyValue; |
| |
| /** |
| * Value represents visited target in the Skyframe graph after error checking. |
| */ |
| @Immutable |
| @ThreadSafe |
| public final class TargetMarkerValue implements SkyValue { |
| |
| // Note that this value does not guarantee singleton-like reference equality because we use Java |
| // deserialization. java deserialization can create other instances. |
| @AutoCodec public static final TargetMarkerValue TARGET_MARKER_INSTANCE = new TargetMarkerValue(); |
| |
| private TargetMarkerValue() { |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return o instanceof TargetMarkerValue; |
| } |
| |
| @Override |
| public int hashCode() { |
| return 42; |
| } |
| |
| @ThreadSafe |
| public static Key key(Label label) { |
| Preconditions.checkArgument(!label.getPackageIdentifier().getRepository().isDefault()); |
| return Key.create(label); |
| } |
| |
| @AutoCodec.VisibleForSerialization |
| @AutoCodec |
| static class Key extends AbstractSkyKey<Label> { |
| private static final Interner<Key> interner = BlazeInterners.newWeakInterner(); |
| |
| private Key(Label arg) { |
| super(arg); |
| } |
| |
| @AutoCodec.VisibleForSerialization |
| @AutoCodec.Instantiator |
| static Key create(Label arg) { |
| return interner.intern(new Key(arg)); |
| } |
| |
| @Override |
| public SkyFunctionName functionName() { |
| return SkyFunctions.TARGET_MARKER; |
| } |
| } |
| } |