/*

 * Copyright (c) 2015, 2017, 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_ZTHREAD_HPP

#define SHARE_GC_Z_ZTHREAD_HPP

#include "memory/allocation.hpp"

#include "utilities/debug.hpp"

class ZThread : public AllStatic {

  friend class ZTask;

private:

  static __thread bool      _initialized;

  static __thread uintptr_t _id;

  static __thread bool      _is_vm;

  static __thread bool      _is_java;

  static __thread bool      _is_worker;

  static __thread uint      _worker_id;

  static void initialize();

  static void ensure_initialized() {

    if (!_initialized) {

      initialize();

    }

  }

  static bool has_worker_id();

  static void set_worker_id(uint worker_id);

  static void clear_worker_id();

public:

  static const char* name();

  static uintptr_t id() {

    ensure_initialized();

    return _id;

  }

  static bool is_vm() {

    ensure_initialized();

    return _is_vm;

  }

  static bool is_java() {

    ensure_initialized();

    return _is_java;

  }

  static bool is_worker() {

    ensure_initialized();

    return _is_worker;

  }

  static uint worker_id() {

    assert(has_worker_id(), "Worker id not initialized");

    return _worker_id;

  }

};

#endif // SHARE_GC_Z_ZTHREAD_HPP