/*

 * Copyright (C) 2012 David Anderson

 *

 * This file is part of JITCraft.

 *

 * JITCraft is free software: you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free

 * Software Foundation, either version 3 of the License, or (at your option)

 * any later version.

 * 

 * Foobar 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 for more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * JITCraft. If not, see http://www.gnu.org/licenses/.

 */

#include "Heap.h"

#include "Heap-inl.h"

#include "Spaces-inl.h"

using namespace jc;

Heap::Heap(Zone *zone)

  : zone_(zone)

{

}

bool

Heap::initialize()

{

    if (!lifoSpace_.initialize())

        return false;

    if (!oldSpace_.initialize())

        return false;

    if (!mapSpace_.initialize())

        return false;

    if ((metaMap_ = allocateMap(MapKind_Meta, sizeof(Map))) == NULL)

        return false;

    metaMap_->init(metaMap_);

    return true;

}

Map *

Heap::allocateMap(MapKind kind, size_t bytes)

{

    size_t actualBytes = Align(bytes, kObjectAlignment);

    Address addr = mapSpace_.allocate(actualBytes);

    if (!addr) {

        assert(false);

        return NULL;

    }

    // Note that we use a NULL type initially, and reinterpret-cast to get

    // the Type pointer, so we can allocate the self-referencing meta type.

    Object *obj = InitAddressIntoObject(addr, NULL);

    Map *map = reinterpret_cast<Map *>(obj);

    map->setKind(kind);

    return map;

}

Address

Heap::newOldObject(size_t bytes)

{

    return oldSpace_.allocate(bytes);

}