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// 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();
}
}
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