threadLocalStorage.hpp revision 1879:f95d63e2154a 
1/*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25#ifndef SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP
26#define SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP
27
28#include "gc_implementation/shared/gcUtil.hpp"
29#include "runtime/os.hpp"
30#include "utilities/top.hpp"
31
32// Interface for thread local storage
33
34// Fast variant of ThreadLocalStorage::get_thread_slow
35extern "C" Thread*   get_thread();
36
37// Get raw thread id: e.g., %g7 on sparc, fs or gs on x86
38extern "C" uintptr_t _raw_thread_id();
39
40class ThreadLocalStorage : AllStatic {
41 public:
42  static void    set_thread(Thread* thread);
43  static Thread* get_thread_slow();
44  static void    invalidate_all() { pd_invalidate_all(); }
45
46  // Machine dependent stuff
47#ifdef TARGET_OS_ARCH_linux_x86
48# include "threadLS_linux_x86.hpp"
49#endif
50#ifdef TARGET_OS_ARCH_linux_sparc
51# include "threadLS_linux_sparc.hpp"
52#endif
53#ifdef TARGET_OS_ARCH_linux_zero
54# include "threadLS_linux_zero.hpp"
55#endif
56#ifdef TARGET_OS_ARCH_solaris_x86
57# include "threadLS_solaris_x86.hpp"
58#endif
59#ifdef TARGET_OS_ARCH_solaris_sparc
60# include "threadLS_solaris_sparc.hpp"
61#endif
62#ifdef TARGET_OS_ARCH_windows_x86
63# include "threadLS_windows_x86.hpp"
64#endif
65
66
67 public:
68  // Accessor
69  static inline int  thread_index()              { return _thread_index; }
70  static inline void set_thread_index(int index) { _thread_index = index; }
71
72  // Initialization
73  // Called explicitly from VMThread::activate_system instead of init_globals.
74  static void init();
75  static bool is_initialized();
76
77 private:
78  static int     _thread_index;
79
80  static void    generate_code_for_get_thread();
81
82  // Processor dependent parts of set_thread and initialization
83  static void pd_set_thread(Thread* thread);
84  static void pd_init();
85  // Invalidate any thread cacheing or optimization schemes.
86  static void pd_invalidate_all();
87
88};
89
90#endif // SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP
91