/*

 * 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.

 */

#include "precompiled.hpp"

#include "gc/z/zThread.hpp"

#include "runtime/thread.hpp"

#include "utilities/debug.hpp"

__thread bool      ZThread::_initialized;

__thread uintptr_t ZThread::_id;

__thread bool      ZThread::_is_vm;

__thread bool      ZThread::_is_java;

__thread bool      ZThread::_is_worker;

__thread uint      ZThread::_worker_id;

void ZThread::initialize() {

  assert(!_initialized, "Already initialized");

  const Thread* const thread = Thread::current();

  _initialized = true;

  _id = (uintptr_t)thread;

  _is_vm = thread->is_VM_thread();

  _is_java = thread->is_Java_thread();

  _is_worker = thread->is_Worker_thread();

  _worker_id = (uint)-1;

}

const char* ZThread::name() {

  const Thread* const thread = Thread::current();

  if (thread->is_Named_thread()) {

    const NamedThread* const named = (const NamedThread*)thread;

    return named->name();

  } else if (thread->is_Java_thread()) {

    return "Java";

  }

  return "Unknown";

}

bool ZThread::has_worker_id() {

  return _initialized &&

         _is_worker &&

         _worker_id != (uint)-1;

}

void ZThread::set_worker_id(uint worker_id) {

  ensure_initialized();

  assert(!has_worker_id(), "Worker id already initialized");

  _worker_id = worker_id;

}

void ZThread::clear_worker_id() {

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

  _worker_id = (uint)-1;

}