1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General  License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General  License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General  License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */

  25 package java.net.http;
  26 
  27 import java.util.concurrent.Executor;
  28 import java.util.concurrent.RejectedExecutionException;
  29 import java.util.concurrent.atomic.AtomicInteger;
  30 
  31 import static java.util.Objects.requireNonNull;
  32 
  33 //
  34 // The problem:
  35 // ------------
  36 //   1. For every invocation of 'signal()' there must be at least
  37 //      1 invocation of 'handler.run()' that goes after
  38 //   2. There must be no more than 1 thread running the 'handler.run()'
  39 //      at any given time
  40 //
  41 // For example, imagine each signal increments (+1) some number. Then the
  42 // handler responds (eventually) the way that makes the number 0.
  43 //
  44 // For each signal there's a response. Several signals may be handled by a

   1 /*
   2  * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.net.http;
  27 
  28 import java.util.concurrent.Executor;
  29 import java.util.concurrent.RejectedExecutionException;
  30 import java.util.concurrent.atomic.AtomicInteger;
  31 
  32 import static java.util.Objects.requireNonNull;
  33 
  34 //
  35 // The problem:
  36 // ------------
  37 //   1. For every invocation of 'signal()' there must be at least
  38 //      1 invocation of 'handler.run()' that goes after
  39 //   2. There must be no more than 1 thread running the 'handler.run()'
  40 //      at any given time
  41 //
  42 // For example, imagine each signal increments (+1) some number. Then the
  43 // handler responds (eventually) the way that makes the number 0.
  44 //
  45 // For each signal there's a response. Several signals may be handled by a