1 /*
   2  * Copyright (c) 2015, 2017, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #ifndef SHARE_GC_Z_ZMESSAGEPORT_HPP
  25 #define SHARE_GC_Z_ZMESSAGEPORT_HPP
  26 
  27 #include "gc/z/zFuture.hpp"
  28 #include "gc/z/zList.hpp"
  29 #include "memory/allocation.hpp"
  30 #include "runtime/mutex.hpp"
  31 
  32 template <typename T> class ZMessageRequest;
  33 
  34 template <typename T>
  35 class ZMessagePort VALUE_OBJ_CLASS_SPEC {
  36 private:
  37   typedef ZMessageRequest<T> Request;
  38 
  39   Monitor        _monitor;
  40   bool           _has_message;
  41   T              _message;
  42   uint64_t       _seqnum;
  43   ZList<Request> _queue;
  44 
  45 public:
  46   ZMessagePort();
  47 
  48   void send_sync(T message);
  49   void send_async(T message);
  50 
  51   T receive();
  52   void ack();
  53 };
  54 
  55 class ZRendezvousPort VALUE_OBJ_CLASS_SPEC {
  56 private:
  57   ZMessagePort<bool> _port;
  58 
  59 public:
  60   void signal();
  61   void wait();
  62   void ack();
  63 };
  64 
  65 #endif // SHARE_GC_Z_ZMESSAGEPORT_HPP