jdk8-mips64-public/hotspot: src/share/vm/runtime/threadLocalStorage.cpp@248ff38d2950

     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.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "runtime/thread.inline.hpp"

    27 #include "runtime/threadLocalStorage.hpp"

    28 #ifdef TARGET_OS_FAMILY_linux

    29 # include "os_linux.inline.hpp"

    30 #endif

    31 #ifdef TARGET_OS_FAMILY_solaris

    32 # include "os_solaris.inline.hpp"

    33 #endif

    34 #ifdef TARGET_OS_FAMILY_windows

    35 # include "os_windows.inline.hpp"

    36 #endif

    37 #ifdef TARGET_OS_FAMILY_bsd

    38 # include "os_bsd.inline.hpp"

    39 #endif

    41 // static member initialization

    42 int ThreadLocalStorage::_thread_index = -1;

    44 Thread* ThreadLocalStorage::get_thread_slow() {

    45   return (Thread*) os::thread_local_storage_at(ThreadLocalStorage::thread_index());

    46 }

    48 void ThreadLocalStorage::set_thread(Thread* thread) {

    49   pd_set_thread(thread);

    51   // The following ensure that any optimization tricks we have tried

    52   // did not backfire on us:

    53   guarantee(get_thread()      == thread, "must be the same thread, quickly");

    54   guarantee(get_thread_slow() == thread, "must be the same thread, slowly");

    55 }

    57 void ThreadLocalStorage::init() {

    58   assert(!is_initialized(),

    59          "More than one attempt to initialize threadLocalStorage");

    60   pd_init();

    61   set_thread_index(os::allocate_thread_local_storage());

    62   generate_code_for_get_thread();

    63 }

    65 bool ThreadLocalStorage::is_initialized() {

    66     return (thread_index() != -1);

    67 }

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