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// 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.actions;
import com.google.common.annotations.VisibleForTesting;
import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadCompatible;
import com.google.devtools.build.lib.util.OS;
/**
* This class estimates the local host's resource capacity.
*/
@ThreadCompatible
public final class LocalHostCapacity {
private static final OS currentOS = OS.getCurrent();
private static ResourceSet localHostCapacity;
private LocalHostCapacity() {}
public static ResourceSet getLocalHostCapacity() {
if (localHostCapacity == null) {
localHostCapacity = getNewLocalHostCapacity();
}
return localHostCapacity;
}
private static ResourceSet getNewLocalHostCapacity() {
ResourceSet localResources = null;
switch (currentOS) {
case DARWIN:
localResources = LocalHostResourceManagerDarwin.getLocalHostResources();
break;
case LINUX:
localResources = LocalHostResourceManagerLinux.getLocalHostResources();
break;
default:
break;
}
if (localResources == null) {
localResources = LocalHostResourceFallback.getLocalHostResources();
}
return localResources;
}
/**
* Sets the local host capacity to hardcoded values.
*
* @param capacity the explicit capacity, or null to use the machine-specific values again
*/
@VisibleForTesting
public static void setLocalHostCapacity(ResourceSet capacity) {
localHostCapacity = capacity;
}
}
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