TimedComputable.java

package jetbrains.mps.core.tool.environment.classloading;

/*Generated by MPS */

import org.jetbrains.annotations.NotNull;

@SuppressWarnings(value = {"NonPrivateFieldAccessedInSynchronizedContext"})
public abstract class TimedComputable<T> extends Timed<T> {
  private int myAcquireCount = 0;
  public TimedComputable() {
  }
  public T acquire() {
    myAccessCount++;
    myAcquireCount++;
    if (myT == null) {
      myT = calc();
    }
    poll();
    return myT;
  }
  protected T getIfCached() {
    return myT;
  }
  public void release() {
    myAcquireCount--;
    assert myAcquireCount >= 0;
  }
  @Override
  public void dispose() {
    assert myAcquireCount == 0;
    super.dispose();
  }
  @Override
  protected boolean isLocked() {
    return myAcquireCount != 0;
  }
  @NotNull
  protected abstract T calc();
}