io.activej.common.concurrent.ThreadLocalCharArray Maven / Gradle / Ivy
/*
* Copyright (C) 2020 ActiveJ LLC.
*
* 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 io.activej.common.concurrent;
public final class ThreadLocalCharArray {
private ThreadLocalCharArray() {
}
private static final ThreadLocal THREAD_LOCAL = ThreadLocal.withInitial(() -> new char[0]);
public static char[] ensure(int size) {
char[] chars = THREAD_LOCAL.get();
if (chars.length >= size) return chars;
chars = new char[size + (size >>> 2)];
THREAD_LOCAL.set(chars);
return chars;
}
public static char[] ensure(char[] providedBuffer, int size) {
if (providedBuffer.length >= size) return providedBuffer;
return ensure(size);
}
}