/**
* Cancels the operation and signals the cancellation listener. If the operation has not yet
* started, then it will be canceled as soon as it does.
*/
public void cancel() {
final OnCancelListener listener;
final ICancellationSignal remote;
synchronized (this) {
if (mIsCanceled) {
return;
}
mIsCanceled = true;
mCancelInProgress = true;
listener = mOnCancelListener;
remote = mRemote;
}
try {
if (listener != null) {
listener.onCancel();
}
if (remote != null) {
try {
remote.cancel();
} catch (RemoteException ex) {
}
}
} finally {
synchronized (this) {
mCancelInProgress = false;
notifyAll();
}
}
}
/**
* Sets the remote transport.
*
* <p>If {@link CancellationSignal#cancel} has already been called, then the provided remote
* transport is canceled immediately.
*
* <p>This method is guaranteed that the remote transport will not be called after it has been
* removed.
*
* @param remote The remote transport, or null to remove.
* @hide
*/
public void setRemote(ICancellationSignal remote) {
synchronized (this) {
waitForCancelFinishedLocked();
if (mRemote == remote) {
return;
}
mRemote = remote;
if (!mIsCanceled || remote == null) {
return;
}
}
try {
remote.cancel();
} catch (RemoteException ex) {
}
}