1/* 2 * Copyright (C) 2009 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.google.common.base; 18 19import com.google.common.annotations.GwtCompatible; 20 21/** 22 * Methods factored out so that they can be emulated differently in GWT. 23 * 24 * @author Jesse Wilson 25 */ 26@GwtCompatible(emulated = true) 27final class Platform { 28 private Platform() {} 29 30 /** Returns a thread-local 1024-char array. */ 31 static char[] charBufferFromThreadLocal() { 32 return DEST_TL.get(); 33 } 34 35 /** Calls {@link System#nanoTime()}. */ 36 static long systemNanoTime() { 37 return System.nanoTime(); 38 } 39 40 /** 41 * A thread-local destination buffer to keep us from creating new buffers. 42 * The starting size is 1024 characters. If we grow past this we don't 43 * put it back in the threadlocal, we just keep going and grow as needed. 44 */ 45 private static final ThreadLocal<char[]> DEST_TL = new ThreadLocal<char[]>() { 46 @Override 47 protected char[] initialValue() { 48 return new char[1024]; 49 } 50 }; 51 52 static CharMatcher precomputeCharMatcher(CharMatcher matcher) { 53 return matcher.precomputedInternal(); 54 } 55} 56