/*

 * Copyright (c) 2018, 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_GC_Z_ZTHREADLOCALDATA_HPP

#define SHARE_GC_Z_ZTHREADLOCALDATA_HPP

#include "gc/z/zMarkStack.hpp"

#include "gc/z/zGlobals.hpp"

#include "runtime/thread.hpp"

#include "utilities/debug.hpp"

#include "utilities/sizes.hpp"

class ZThreadLocalData {

private:

  uintptr_t              _address_bad_mask;

  ZMarkThreadLocalStacks _stacks;

  oop*                   _invisible_root;

  ZThreadLocalData() :

      _address_bad_mask(0),

      _stacks(),

      _invisible_root(NULL) {}

  static ZThreadLocalData* data(Thread* thread) {

    return thread->gc_data<ZThreadLocalData>();

  }

public:

  static void create(Thread* thread) {

    new (data(thread)) ZThreadLocalData();

  }

  static void destroy(Thread* thread) {

    data(thread)->~ZThreadLocalData();

  }

  static void set_address_bad_mask(Thread* thread, uintptr_t mask) {

    data(thread)->_address_bad_mask = mask;

  }

  static ZMarkThreadLocalStacks* stacks(Thread* thread) {

    return &data(thread)->_stacks;

  }

  static void set_invisible_root(Thread* thread, oop* root) {

    assert(data(thread)->_invisible_root == NULL, "Already set");

    data(thread)->_invisible_root = root;

  }

  static void clear_invisible_root(Thread* thread) {

    assert(data(thread)->_invisible_root != NULL, "Should be set");

    data(thread)->_invisible_root = NULL;

  }

  template <typename T>

  static void do_invisible_root(Thread* thread, T f) {

    if (data(thread)->_invisible_root != NULL) {

      f(data(thread)->_invisible_root);

    }

  }

  static ByteSize address_bad_mask_offset() {

    return Thread::gc_data_offset() + byte_offset_of(ZThreadLocalData, _address_bad_mask);

  }

  static ByteSize nmethod_disarmed_offset() {

    return address_bad_mask_offset() + in_ByteSize(ZNMethodDisarmedOffset);

  }

};

#endif // SHARE_GC_Z_ZTHREADLOCALDATA_HPP