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 }