1 /*
   2  * Copyright (c) 1997, 2015, 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/os.inline.hpp"
  27 #include "runtime/thread.inline.hpp"
  28 #include "runtime/threadLocalStorage.hpp"
  29 
  30 // Solaris no longer has this kind of ThreadLocalStorage implementation.
  31 // This will be removed from all platforms in the near future.
  32 
  33 #ifndef SOLARIS
  34 
  35 // static member initialization
  36 int ThreadLocalStorage::_thread_index = -1;
  37 
  38 Thread* ThreadLocalStorage::get_thread_slow() {
  39   return (Thread*) os::thread_local_storage_at(ThreadLocalStorage::thread_index());
  40 }
  41 
  42 void ThreadLocalStorage::set_thread(Thread* thread) {
  43   pd_set_thread(thread);
  44 
  45   // The following ensure that any optimization tricks we have tried
  46   // did not backfire on us:
  47   guarantee(get_thread()      == thread, "must be the same thread, quickly");
  48   guarantee(get_thread_slow() == thread, "must be the same thread, slowly");
  49 }
  50 
  51 void ThreadLocalStorage::init() {
  52   assert(!is_initialized(),
  53          "More than one attempt to initialize threadLocalStorage");
  54   pd_init();
  55   set_thread_index(os::allocate_thread_local_storage());
  56   generate_code_for_get_thread();
  57 }
  58 
  59 bool ThreadLocalStorage::is_initialized() {
  60     return (thread_index() != -1);
  61 }
  62 
  63 #endif // SOLARIS
--- EOF ---