/*

 * Copyright (c) 2001, 2015, 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.

 *

 */

#include "precompiled.hpp"

#include "gc/parallel/immutableSpace.hpp"

#include "memory/universe.hpp"

#include "oops/oop.inline.hpp"

#include "utilities/macros.hpp"

void ImmutableSpace::initialize(MemRegion mr) {

  HeapWord* bottom = mr.start();

  HeapWord* end    = mr.end();

  assert(Universe::on_page_boundary(bottom) && Universe::on_page_boundary(end),

         "invalid space boundaries");

  _bottom = bottom;

  _end = end;

}

void ImmutableSpace::oop_iterate(ExtendedOopClosure* cl) {

  HeapWord* obj_addr = bottom();

  HeapWord* t = end();

  // Could call objects iterate, but this is easier.

  while (obj_addr < t) {

    obj_addr += oop(obj_addr)->oop_iterate_size(cl);

  }

}

void ImmutableSpace::object_iterate(ObjectClosure* cl) {

  HeapWord* p = bottom();

  while (p < end()) {

    cl->do_object(oop(p));

    p += oop(p)->size();

  }

}

#ifndef PRODUCT

void ImmutableSpace::print_short() const {

  tty->print(" space " SIZE_FORMAT "K, 100%% used", capacity_in_bytes() / K);

}

void ImmutableSpace::print() const {

  print_short();

  tty->print_cr(" [" INTPTR_FORMAT_W(#-6) "," INTPTR_FORMAT_W(#-6) ")", p2i(bottom()), p2i(end()));

}

#endif

void ImmutableSpace::verify() {

  HeapWord* p = bottom();

  HeapWord* t = end();

  HeapWord* prev_p = NULL;

  while (p < t) {

    oop(p)->verify();

    prev_p = p;

    p += oop(p)->size();

  }

  guarantee(p == end(), "end of last object must match end of space");

}