--- a/hotspot/src/share/vm/memory/metablock.hpp Tue Oct 22 16:29:33 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