--- a/src/java.net.http/share/classes/java/net/http/internal/common/Demand.java Wed Feb 07 15:46:30 2018 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,116 +0,0 @@
-/*
- * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package java.net.http.internal.common;
-
-import java.util.concurrent.atomic.AtomicLong;
-
-/**
- * Encapsulates operations with demand (Reactive Streams).
- *
- * <p> Demand is the aggregated number of elements requested by a Subscriber
- * which is yet to be delivered (fulfilled) by the Publisher.
- */
-public final class Demand {
-
- private final AtomicLong val = new AtomicLong();
-
- /**
- * Increases this demand by the specified positive value.
- *
- * @param n
- * increment {@code > 0}
- *
- * @return {@code true} iff prior to this operation this demand was fulfilled
- */
- public boolean increase(long n) {
- if (n <= 0) {
- throw new IllegalArgumentException(String.valueOf(n));
- }
- long prev = val.getAndAccumulate(n, (p, i) -> p + i < 0 ? Long.MAX_VALUE : p + i);
- return prev == 0;
- }
-
- /**
- * Tries to decrease this demand by the specified positive value.
- *
- * <p> The actual value this demand has been decreased by might be less than
- * {@code n}, including {@code 0} (no decrease at all).
- *
- * @param n
- * decrement {@code > 0}
- *
- * @return a value {@code m} ({@code 0 <= m <= n}) this demand has been
- * actually decreased by
- */
- public long decreaseAndGet(long n) {
- if (n <= 0) {
- throw new IllegalArgumentException(String.valueOf(n));
- }
- long p, d;
- do {
- d = val.get();
- p = Math.min(d, n);
- } while (!val.compareAndSet(d, d - p));
- return p;
- }
-
- /**
- * Tries to decrease this demand by {@code 1}.
- *
- * @return {@code true} iff this demand has been decreased by {@code 1}
- */
- public boolean tryDecrement() {
- return decreaseAndGet(1) == 1;
- }
-
- /**
- * @return {@code true} iff there is no unfulfilled demand
- */
- public boolean isFulfilled() {
- return val.get() == 0;
- }
-
- /**
- * Resets this object to its initial state.
- */
- public void reset() {
- val.set(0);
- }
-
- /**
- * Returns the current value of this demand.
- *
- * @return the current value of this demand
- */
- public long get() {
- return val.get();
- }
-
- @Override
- public String toString() {
- return String.valueOf(val.get());
- }
-}