/*

 * Copyright (c) 1997, 2010, 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_VM_RUNTIME_THREADLOCALSTORAGE_HPP

#define SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP

#include "gc_implementation/shared/gcUtil.hpp"

#include "runtime/os.hpp"

#include "utilities/top.hpp"

// Interface for thread local storage

// Fast variant of ThreadLocalStorage::get_thread_slow

extern "C" Thread*   get_thread();

// Get raw thread id: e.g., %g7 on sparc, fs or gs on x86

extern "C" uintptr_t _raw_thread_id();

class ThreadLocalStorage : AllStatic {

 public:

  static void    set_thread(Thread* thread);

  static Thread* get_thread_slow();

  static void    invalidate_all() { pd_invalidate_all(); }

  // Machine dependent stuff

#ifdef TARGET_OS_ARCH_linux_x86

# include "threadLS_linux_x86.hpp"

#endif

#ifdef TARGET_OS_ARCH_linux_sparc

# include "threadLS_linux_sparc.hpp"

#endif

#ifdef TARGET_OS_ARCH_linux_zero

# include "threadLS_linux_zero.hpp"

#endif

#ifdef TARGET_OS_ARCH_solaris_x86

# include "threadLS_solaris_x86.hpp"

#endif

#ifdef TARGET_OS_ARCH_solaris_sparc

# include "threadLS_solaris_sparc.hpp"

#endif

#ifdef TARGET_OS_ARCH_windows_x86

# include "threadLS_windows_x86.hpp"

#endif

 public:

  // Accessor

  static inline int  thread_index()              { return _thread_index; }

  static inline void set_thread_index(int index) { _thread_index = index; }

  // Initialization

  // Called explicitly from VMThread::activate_system instead of init_globals.

  static void init();

  static bool is_initialized();

 private:

  static int     _thread_index;

  static void    generate_code_for_get_thread();

  // Processor dependent parts of set_thread and initialization

  static void pd_set_thread(Thread* thread);

  static void pd_init();

  // Invalidate any thread cacheing or optimization schemes.

  static void pd_invalidate_all();

};

#endif // SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP