| // Copyright 2017 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.profiler.memory; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.devtools.build.lib.packages.AspectClass; |
| import com.google.devtools.build.lib.packages.RuleClass; |
| |
| /** Thread-local variables that keep track of the current rule being configured. */ |
| public final class CurrentRuleTracker { |
| private static final ThreadLocal<RuleClass> currentRule = new ThreadLocal<>(); |
| private static final ThreadLocal<AspectClass> currentAspect = new ThreadLocal<>(); |
| private static boolean enabled; |
| |
| private CurrentRuleTracker() {} |
| |
| public static void setEnabled(boolean enabled) { |
| CurrentRuleTracker.enabled = enabled; |
| } |
| |
| /** |
| * Sets the current rule being instantiated. Used for memory tracking. |
| * |
| * <p>You must call {@link CurrentRuleTracker#endConfiguredTarget()} after calling this. |
| */ |
| public static void beginConfiguredTarget(RuleClass ruleClass) { |
| if (!enabled) { |
| return; |
| } |
| currentRule.set(ruleClass); |
| } |
| |
| public static void endConfiguredTarget() { |
| if (!enabled) { |
| return; |
| } |
| currentRule.set(null); |
| } |
| |
| /** |
| * Sets the current aspect being instantiated. Used for memory tracking. |
| * |
| * <p>You must call {@link CurrentRuleTracker#endConfiguredAspect()} after calling this. |
| */ |
| public static void beginConfiguredAspect(AspectClass aspectClass) { |
| if (!enabled) { |
| return; |
| } |
| currentAspect.set(aspectClass); |
| } |
| |
| public static void endConfiguredAspect() { |
| if (!enabled) { |
| return; |
| } |
| currentAspect.set(null); |
| } |
| |
| public static RuleClass getRule() { |
| Preconditions.checkState(enabled); |
| return currentRule.get(); |
| } |
| |
| public static AspectClass getAspect() { |
| Preconditions.checkState(enabled); |
| return currentAspect.get(); |
| } |
| } |