11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2009 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * you may not use this file except in compliance with the License. 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * You may obtain a copy of the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * See the License for the specific language governing permissions and 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * limitations under the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.base; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.concurrent.TimeUnit; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Jesse Wilson 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertclass Platform { 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private static final char[] CHAR_BUFFER = new char[1024]; 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert static char[] charBufferFromThreadLocal() { 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // ThreadLocal is not available to GWT, so we always reuse the same 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // instance. It is always safe to return the same instance because 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // javascript is single-threaded, and only used by blocks that doesn't 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // involve async callbacks. 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return CHAR_BUFFER; 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert static CharMatcher precomputeCharMatcher(CharMatcher matcher) { 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // CharMatcher.precomputed() produces CharMatchers that are maybe a little 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // faster (and that's debatable), but definitely more memory-hungry. We're 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // choosing to turn .precomputed() into a no-op in GWT, because it doesn't 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // seem to be a worthwhile tradeoff in a browser. 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return matcher; 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert static long systemNanoTime() { 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // System.nanoTime() is not available in GWT, so we get milliseconds 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // and convert to nanos. 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return TimeUnit.MILLISECONDS.toNanos(System.currentTimeMillis()); 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 50