jdk8-mips64-public/hotspot: src/share/vm/services/memPtrArray.hpp@8b46b0196eb0 (annotated)

src/share/vm/services/memPtrArray.hpp@8b46b0196eb0 (annotated)

src/share/vm/services/memPtrArray.hpp

Fri, 25 Jan 2013 10:04:08 -0500

author: zgu
date: Fri, 25 Jan 2013 10:04:08 -0500
changeset 4492: 8b46b0196eb0
parent 4053: 33143ee07800
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8000692: Remove old KERNEL code
Summary: Removed depreciated kernel VM source code from hotspot VM
Reviewed-by: dholmes, acorn

 /*
  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_UTILITIES_MEM_PTR_ARRAY_HPP
 #define SHARE_VM_UTILITIES_MEM_PTR_ARRAY_HPP
 #include "memory/allocation.hpp"
 #include "services/memPtr.hpp"
 class MemPtr;
 class MemRecorder;
 class ArenaInfo;
 class MemSnapshot;
 extern "C" {
   typedef int (*FN_SORT)(const void *, const void *);
 }
 // Memory pointer array interface. This array is used by NMT to hold
 // various memory block information.
 // The memory pointer arrays are usually walked with their iterators.
 class MemPointerArray : public CHeapObj<mtNMT> {
  public:
   virtual ~MemPointerArray() { }
   // return true if it can not allocate storage for the data
   virtual bool out_of_memory() const = 0;
   virtual bool is_empty() const = 0;
   virtual bool is_full() = 0;
   virtual int  length() const = 0;
   virtual void clear() = 0;
   virtual bool append(MemPointer* ptr) = 0;
   virtual bool insert_at(MemPointer* ptr, int pos) = 0;
   virtual bool remove_at(int pos) = 0;
   virtual MemPointer* at(int index) const = 0;
   virtual void sort(FN_SORT fn) = 0;
   virtual size_t instance_size() const = 0;
   virtual bool shrink() = 0;
   NOT_PRODUCT(virtual int capacity() const = 0;)
 };
 // Iterator interface
 class MemPointerArrayIterator VALUE_OBJ_CLASS_SPEC {
  public:
   // return the pointer at current position
   virtual MemPointer* current() const = 0;
   // return the next pointer and advance current position
   virtual MemPointer* next() = 0;
   // return next pointer without advancing current position
   virtual MemPointer* peek_next() const = 0;
   // return previous pointer without changing current position
   virtual MemPointer* peek_prev() const = 0;
   // remove the pointer at current position
   virtual void        remove() = 0;
   // insert the pointer at current position
   virtual bool        insert(MemPointer* ptr) = 0;
   // insert specified element after current position and
   // move current position to newly inserted position
   virtual bool        insert_after(MemPointer* ptr) = 0;
 };
 // implementation class
 class MemPointerArrayIteratorImpl : public MemPointerArrayIterator {
  protected:
   MemPointerArray*  _array;
   int               _pos;
  public:
   MemPointerArrayIteratorImpl(MemPointerArray* arr) {
     assert(arr != NULL, "Parameter check");
     _array = arr;
     _pos = 0;
   }
   virtual MemPointer* current() const {
     if (_pos < _array->length()) {
       return _array->at(_pos);
     }
     return NULL;
   }
   virtual MemPointer* next() {
     if (_pos + 1 < _array->length()) {
       return _array->at(++_pos);
     }
     _pos = _array->length();
     return NULL;
   }
   virtual MemPointer* peek_next() const {
     if (_pos + 1 < _array->length()) {
       return _array->at(_pos + 1);
     }
     return NULL;
   }
   virtual MemPointer* peek_prev() const {
     if (_pos > 0) {
       return _array->at(_pos - 1);
     }
     return NULL;
   }
   virtual void remove() {
     if (_pos < _array->length()) {
       _array->remove_at(_pos);
     }
   }
   virtual bool insert(MemPointer* ptr) {
     return _array->insert_at(ptr, _pos);
   }
   virtual bool insert_after(MemPointer* ptr) {
     if (_array->insert_at(ptr, _pos + 1)) {
       _pos ++;
       return true;
     }
     return false;
   }
 };
 // Memory pointer array implementation.
 // This implementation implements expandable array
 #define DEFAULT_PTR_ARRAY_SIZE 1024
 template <class E> class MemPointerArrayImpl : public MemPointerArray {
  private:
   int                   _max_size;
   int                   _size;
   bool                  _init_elements;
   E*                    _data;
  public:
   MemPointerArrayImpl(int initial_size = DEFAULT_PTR_ARRAY_SIZE, bool init_elements = true):
    _max_size(initial_size), _size(0), _init_elements(init_elements) {
     _data = (E*)raw_allocate(sizeof(E), initial_size);
     if (_init_elements) {
       for (int index = 0; index < _max_size; index ++) {
         ::new ((void*)&_data[index]) E();
       }
     }
   }
   virtual ~MemPointerArrayImpl() {
     if (_data != NULL) {
       raw_free(_data);
     }
   }
  public:
   bool out_of_memory() const {
     return (_data == NULL);
   }
   size_t instance_size() const {
     return sizeof(MemPointerArrayImpl<E>) + _max_size * sizeof(E);
   }
   bool is_empty() const {
     assert(_data != NULL, "Just check");
     return _size == 0;
   }
   bool is_full() {
     assert(_data != NULL, "Just check");
     if (_size < _max_size) {
       return false;
     } else {
       return !expand_array();
     }
   }
   int length() const {
     assert(_data != NULL, "Just check");
     return _size;
   }
   NOT_PRODUCT(int capacity() const { return _max_size; })
   void clear() {
     assert(_data != NULL, "Just check");
     _size = 0;
   }
   bool append(MemPointer* ptr) {
     assert(_data != NULL, "Just check");
     if (is_full()) {
       return false;
     }
     _data[_size ++] = *(E*)ptr;
     return true;
   }
   bool insert_at(MemPointer* ptr, int pos) {
     assert(_data != NULL, "Just check");
     if (is_full()) {
       return false;
     }
     for (int index = _size; index > pos; index --) {
       _data[index] = _data[index - 1];
     }
     _data[pos] = *(E*)ptr;
     _size ++;
     return true;
   }
   bool remove_at(int pos) {
     assert(_data != NULL, "Just check");
     if (_size <= pos && pos >= 0) {
       return false;
     }
     -- _size;
     for (int index = pos; index < _size; index ++) {
       _data[index] = _data[index + 1];
     }
     return true;
   }
   MemPointer* at(int index) const {
     assert(_data != NULL, "Just check");
     assert(index >= 0 && index < _size, "illegal index");
     return &_data[index];
   }
   bool shrink() {
     float used = ((float)_size) / ((float)_max_size);
     if (used < 0.40) {
       E* old_ptr = _data;
       int new_size = ((_max_size) / (2 * DEFAULT_PTR_ARRAY_SIZE) + 1) * DEFAULT_PTR_ARRAY_SIZE;
       _data = (E*)raw_reallocate(_data, sizeof(E), new_size);
       if (_data == NULL) {
         _data = old_ptr;
         return false;
       } else {
         _max_size = new_size;
         return true;
       }
     }
     return false;
   }
   void sort(FN_SORT fn) {
     assert(_data != NULL, "Just check");
     qsort((void*)_data, _size, sizeof(E), fn);
   }
  private:
   bool  expand_array() {
     assert(_data != NULL, "Not yet allocated");
     E* old_ptr = _data;
     if ((_data = (E*)raw_reallocate((void*)_data, sizeof(E),
       _max_size + DEFAULT_PTR_ARRAY_SIZE)) == NULL) {
       _data = old_ptr;
       return false;
     } else {
       _max_size += DEFAULT_PTR_ARRAY_SIZE;
       if (_init_elements) {
         for (int index = _size; index < _max_size; index ++) {
           ::new ((void*)&_data[index]) E();
         }
       }
       return true;
     }
   }
   void* raw_allocate(size_t elementSize, int items) {
     return os::malloc(elementSize * items, mtNMT);
   }
   void* raw_reallocate(void* ptr, size_t elementSize, int items) {
     return os::realloc(ptr, elementSize * items, mtNMT);
   }
   void  raw_free(void* ptr) {
     os::free(ptr, mtNMT);
   }
 };
 #endif // SHARE_VM_UTILITIES_MEM_PTR_ARRAY_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/memPtrArray.hpp@8b46b0196eb0 (annotated)

src/share/vm/services/memPtrArray.hpp