// Test of use of Lock interface

import java.util.Date;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.checkerframework.checker.lock.qual.Holding;
import org.checkerframework.checker.lock.qual.MayReleaseLocks;
import org.checkerframework.checker.lock.qual.ReleasesNoLocks;

public class LockInterfaceTest {

  static final Lock myStaticLock = new ReentrantLock(true);

  private static final Date x = new Date((long) (System.currentTimeMillis() * Math.random()));

  @Holding("myStaticLock")
  @ReleasesNoLocks
  static void method4() {
    System.out.println(x);
  }

  @Holding("LockInterfaceTest.myStaticLock")
  @ReleasesNoLocks
  static void method5() {
    System.out.println(x);
  }

  @MayReleaseLocks
  public static void test1() {
    LockInterfaceTest.myStaticLock.lock();
    method4();
    LockInterfaceTest.myStaticLock.unlock();
  }

  @MayReleaseLocks
  public static void test2() {
    LockInterfaceTest.myStaticLock.lock();
    method5();
    LockInterfaceTest.myStaticLock.unlock();
  }

  @MayReleaseLocks
  public static void test3() {
    myStaticLock.lock();
    method4();
    myStaticLock.unlock();
  }

  @MayReleaseLocks
  public static void test4() {
    myStaticLock.lock();
    method5();
    myStaticLock.unlock();
  }
}