1 /*
   2  * Copyright (c) 2016, 2018, 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_UTILITIES_RESOURCEMANAGER_HPP
  26 #define SHARE_VM_JFR_UTILITIES_RESOURCEMANAGER_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 
  30 template <class T>
  31 class ResourceManager : public StackObj {
  32  private:
  33   T* const _resource;
  34  public:
  35   ResourceManager(T* resource) : _resource(resource) {}
  36   ~ResourceManager() {
  37     if (_resource != NULL) {
  38       delete _resource;
  39     }
  40   }
  41   operator T*() { return _resource; }
  42   T* operator->() { return _resource; }
  43 };
  44 
  45 template <class T>
  46 class ResourceArrayManager : public StackObj {
  47  private:
  48   T* const _resource_array;
  49  public:
  50   ResourceArrayManager(T* resource_array) : _resource_array(resource_array) {}
  51   ~ResourceArrayManager() {
  52     if (_resource_array != NULL) {
  53       delete [] _resource_array;
  54     }
  55   }
  56   operator T*() { return _resource_array; }
  57   T* operator->() const { return _resource_array; }
  58 };
  59 
  60 #endif // SHARE_VM_JFR_UTILITIES_RESOURCEMANAGER_HPP