1 /*
   2  * Copyright (c) 2012, 2019, 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_JFR_RECORDER_ACCESS_JFRMEMORYSIZER_HPP
  26 #define SHARE_VM_JFR_RECORDER_ACCESS_JFRMEMORYSIZER_HPP
  27 
  28 #include "jni.h"
  29 #include "memory/allocation.hpp"
  30 #include "utilities/globalDefinitions.hpp"
  31 
  32 extern const julong MIN_BUFFER_COUNT;
  33 extern const julong MIN_GLOBAL_BUFFER_SIZE;
  34 extern const julong MIN_MEMORY_SIZE;
  35 extern const julong MIN_THREAD_BUFFER_SIZE;
  36 
  37 struct JfrMemoryOptions {
  38   julong memory_size;
  39   julong global_buffer_size;
  40   julong buffer_count;
  41   julong thread_buffer_size;
  42   bool memory_size_configured;
  43   bool global_buffer_size_configured;
  44   bool buffer_count_configured;
  45   bool thread_buffer_size_configured;
  46 };
  47 
  48 //
  49 // Encapsulates sizing of memory options
  50 // The options parameter is modified with updated values.
  51 //
  52 class JfrMemorySizer: AllStatic {
  53  public:
  54   static bool adjust_options(JfrMemoryOptions* options);
  55 };
  56 
  57 #endif // SHARE_VM_JFR_RECORDER_ACCESS_JFRMEMORYSIZER_HPP