/*

 * Copyright (c) 2015, 2019, 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/z/zPage.inline.hpp"

#include "gc/z/zPhysicalMemory.inline.hpp"

#include "gc/z/zVirtualMemory.inline.hpp"

#include "utilities/align.hpp"

#include "utilities/debug.hpp"

ZPage::ZPage(const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem) :

    _type(type_from_size(vmem.size())),

    _numa_id((uint8_t)-1),

    _seqnum(0),

    _virtual(vmem),

    _top(start()),

    _livemap(object_max_count()),

    _last_used(0),

    _physical(pmem) {

  assert_initialized();

}

ZPage::ZPage(uint8_t type, const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem) :

    _type(type),

    _numa_id((uint8_t)-1),

    _seqnum(0),

    _virtual(vmem),

    _top(start()),

    _livemap(object_max_count()),

    _last_used(0),

    _physical(pmem) {

  assert_initialized();

}

void ZPage::assert_initialized() const {

  assert(!_virtual.is_null(), "Should not be null");

  assert(!_physical.is_null(), "Should not be null");

  assert((_type == ZPageTypeSmall && size() == ZPageSizeSmall) ||

         (_type == ZPageTypeMedium && size() == ZPageSizeMedium) ||

         (_type == ZPageTypeLarge && is_aligned(size(), ZGranuleSize)),

         "Page type/size mismatch");

}

void ZPage::reset() {

  _seqnum = ZGlobalSeqNum;

  _top = start();

  _livemap.reset();

  _last_used = 0;

}

ZPage* ZPage::retype(uint8_t type) {

  assert(_type != type, "Invalid retype");

  _type = type;

  _livemap.resize(object_max_count());

  return this;

}

ZPage* ZPage::split(size_t size) {

  return split(type_from_size(size), size);

}

ZPage* ZPage::split(uint8_t type, size_t size) {

  assert(_virtual.size() > size, "Invalid split");

  // Resize this page, keep _numa_id, _seqnum, and _last_used

  const ZVirtualMemory vmem = _virtual.split(size);

  const ZPhysicalMemory pmem = _physical.split(size);

  _type = type_from_size(_virtual.size());

  _top = start();

  _livemap.resize(object_max_count());

  // Create new page, inherit _seqnum and _last_used

  ZPage* const page = new ZPage(type, vmem, pmem);

  page->_seqnum = _seqnum;

  page->_last_used = _last_used;

  return page;

}

void ZPage::print_on(outputStream* out) const {

  out->print_cr(" %-6s  " PTR_FORMAT " " PTR_FORMAT " " PTR_FORMAT " %s%s",

                type_to_string(), start(), top(), end(),

                is_allocating()  ? " Allocating"  : "",

                is_relocatable() ? " Relocatable" : "");

}

void ZPage::print() const {

  print_on(tty);

}