1 /*

     2  * Copyright (c) 1998, 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  */

    24 

    25 #include "precompiled.hpp"

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

    27 #include "runtime/threadLocalStorage.hpp"

    28 

    29 // Provides an entry point we can link against and

    30 // a buffer we can emit code into. The buffer is

    31 // filled by ThreadLocalStorage::generate_code_for_get_thread

    32 // and called from ThreadLocalStorage::thread()

    33 

    34 int ThreadLocalStorage::_thread_ptr_offset = 0;

    35 

    36 static void call_wrapper_dummy() {}

    37 

    38 // We need to call the os_exception_wrapper once so that it sets

    39 // up the offset from FS of the thread pointer.

    40 void ThreadLocalStorage::generate_code_for_get_thread() {

    41       os::os_exception_wrapper( (java_call_t)call_wrapper_dummy,

    42                                 NULL, NULL, NULL, NULL);

    43 }

    44 

    45 void ThreadLocalStorage::pd_init() { }

    46 

    47 void ThreadLocalStorage::pd_set_thread(Thread* thread)  {

    48   os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);

    49 }