Android Open Source - androidtestdebug Race Condition Fix

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License

The source code is released under:

MIT License

Java Source Code

//
// ?????/*from   w w  w  . j  av a  2s.  c om*/
//     javac -encoding UTF8 RaceConditionFix.java
//
public class RaceConditionFix {
  private static int _sharedCounter = 0;

    private synchronized static void dekker1() {
    _sharedCounter++;
  }

  private synchronized static void dekker2() {
    _sharedCounter++;
  }
  
  public static void main(String[] args) throws Exception {
      if ( args.length != 1 ) {
         System.out.println("????: java RaceCondition <????>");
       return;
    }
    
    final int loopCount = Integer.parseInt(args[0]);
    Thread thread1 = new Thread(new Runnable() {
        public void run() {
        for ( int i = 0; i < loopCount; ++i ) {
          dekker1();
        }
      }
    });
    Thread thread2 = new Thread(new Runnable() {
        public void run() {
        for ( int i = 0; i < loopCount; ++i ) {
          dekker2();
        }
      }
    });
    thread1.start();
    thread2.start();

    thread1.join();
    thread2.join();

    int expected_sum = 2 * loopCount;
    if ( _sharedCounter != expected_sum ) {
         System.out.println(
           String.format("???????: ???? $1%d ???????? $2%d", _sharedCounter, expected_sum));
    }
  }
}

Java Source Code List

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