1 /*
   2  * Copyright (c) 2011, 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 
  25 #ifndef SHARE_VM_SERVICES_GCNOTIFIER_HPP
  26 #define SHARE_VM_SERVICES_GCNOTIFIER_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "services/memoryPool.hpp"
  30 #include "services/memoryService.hpp"
  31 #include "services/memoryManager.hpp"
  32 
  33 class GCNotificationRequest : public CHeapObj {
  34   friend class GCNotifier;
  35   GCNotificationRequest *next;
  36   jlong timestamp;
  37   GCMemoryManager *gcManager;
  38   const char *gcAction;
  39   const char *gcCause;
  40   GCStatInfo *gcStatInfo;
  41 public:
  42   GCNotificationRequest(jlong ts, GCMemoryManager *manager, const char*action, const char *cause,GCStatInfo *info) {
  43     next = NULL;
  44     timestamp = ts;
  45     gcManager = manager;
  46     gcAction = action;
  47     gcCause = cause;
  48     gcStatInfo = info;
  49   }
  50 
  51   ~GCNotificationRequest() {
  52     delete gcStatInfo;
  53   }
  54 };
  55 
  56 class GCNotifier : public AllStatic {
  57   friend class ServiceThread;
  58 private:
  59   static GCNotificationRequest *first_request;
  60   static GCNotificationRequest *last_request;
  61   static void addRequest(GCNotificationRequest *request);
  62   static GCNotificationRequest *getRequest();
  63   static void sendNotificationInternal(TRAPS);
  64 public:
  65   static void pushNotification(GCMemoryManager *manager, const char *action, const char *cause);
  66   static bool has_event();
  67   static void sendNotification(TRAPS);
  68 };
  69 
  70 #endif // SHARE_VM_SERVICES_GCNOTIFIER_HPP