1 /* 2 * Copyright (C) 2014 The Android Open Source Project 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 17 #define DO_2_TIMES(x) x x 18 #define DO_4_TIMES(x) DO_2_TIMES(DO_2_TIMES(x)) 19 #define DO_16_TIMES(x) DO_4_TIMES(DO_4_TIMES(x)) 20 #define DO_256_TIMES(x) DO_16_TIMES(DO_16_TIMES(x)) 21 #define DO_512_TIMES(x) DO_256_TIMES(DO_2_TIMES(x)) 22 23 24 public class Main { 25 public static void main(String[] args) { 26 Main m = new Main(); 27 System.out.println(m.foo(-1, -1)); 28 System.out.println(m.foo(-1, +1)); 29 System.out.println(m.foo(+1, -1)); 30 System.out.println(m.foo(+1, +1)); 31 System.out.println(m.value); 32 } 33 34 public int foo(int a, int b) { 35 if ( a >= 0 ) { 36 if ( b < 0 ) { 37 DO_512_TIMES( synchronized(lock) { value++; } ) 38 return 2; 39 } 40 return 1; 41 } 42 return 0; 43 } 44 45 Object lock = new Object(); 46 int value = 0; 47 } 48
