hotspot/src/share/vm/memory/metablock.hpp
changeset 20729 0a687ee7097d
parent 20728 25114f3ae9af
child 20730 59f433c86d9d
--- a/hotspot/src/share/vm/memory/metablock.hpp	Tue Oct 15 07:10:09 2013 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,101 +0,0 @@
-/*
- * 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_MEMORY_METABLOCK_HPP
-#define SHARE_VM_MEMORY_METABLOCK_HPP
-
-// Metablock are the unit of allocation from a Chunk.  It is initialized
-// with the size of the requested allocation.  That size is overwritten
-// once the allocation returns.
-//
-// A Metablock may be reused by its SpaceManager but are never moved between
-// SpaceManagers.  There is no explicit link to the Metachunk
-// from which it was allocated.  Metablock may be deallocated and
-// put on a freelist but the space is never freed, rather
-// the Metachunk it is a part of will be deallocated when it's
-// associated class loader is collected.
-
-class Metablock VALUE_OBJ_CLASS_SPEC {
-  friend class VMStructs;
- private:
-  // Used to align the allocation (see below).
-  union block_t {
-    void* _data[3];
-    struct header_t {
-      size_t _word_size;
-      Metablock* _next;
-      Metablock* _prev;
-    } _header;
-  } _block;
-  static size_t _min_block_byte_size;
-
-  typedef union block_t Block;
-  typedef struct header_t Header;
-  const Block* block() const { return &_block; }
-  const Block::header_t* header() const { return &(block()->_header); }
- public:
-
-  static Metablock* initialize(MetaWord* p, size_t word_size);
-
-  // This places the body of the block at a 2 word boundary
-  // because every block starts on a 2 word boundary.  Work out
-  // how to make the body on a 2 word boundary if the block
-  // starts on a arbitrary boundary.  JJJ
-
-  size_t word_size() const  { return header()->_word_size; }
-  void set_word_size(size_t v) { _block._header._word_size = v; }
-  size_t size() const volatile { return _block._header._word_size; }
-  void set_size(size_t v) { _block._header._word_size = v; }
-  Metablock* next() const { return header()->_next; }
-  void set_next(Metablock* v) { _block._header._next = v; }
-  Metablock* prev() const { return header()->_prev; }
-  void set_prev(Metablock* v) { _block._header._prev = v; }
-
-  static size_t min_block_byte_size() { return _min_block_byte_size; }
-
-  bool is_free()                 { return header()->_word_size != 0; }
-  void clear_next()              { set_next(NULL); }
-  void link_prev(Metablock* ptr) { set_prev(ptr); }
-  uintptr_t* end()              { return ((uintptr_t*) this) + size(); }
-  bool cantCoalesce() const     { return false; }
-  void link_next(Metablock* ptr) { set_next(ptr); }
-  void link_after(Metablock* ptr){
-    link_next(ptr);
-    if (ptr != NULL) ptr->link_prev(this);
-  }
-
-  // Should not be needed in a free list of Metablocks
-  void markNotFree()            { ShouldNotReachHere(); }
-
-  // Debug support
-#ifdef ASSERT
-  void* prev_addr() const { return (void*)&_block._header._prev; }
-  void* next_addr() const { return (void*)&_block._header._next; }
-  void* size_addr() const { return (void*)&_block._header._word_size; }
-#endif
-  bool verify_chunk_in_free_list(Metablock* tc) const { return true; }
-  bool verify_par_locked() { return true; }
-
-  void assert_is_mangled() const {/* Don't check "\*/}
-};
-#endif // SHARE_VM_MEMORY_METABLOCK_HPP