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 */ 24 25 #include "precompiled.hpp" 26 #include "runtime/threadLocalStorage.hpp" 27 #ifdef TARGET_OS_FAMILY_linux 28 # include "os_linux.inline.hpp" 29 # include "thread_linux.inline.hpp" 30 #endif 31 #ifdef TARGET_OS_FAMILY_solaris 32 # include "os_solaris.inline.hpp" 33 # include "thread_solaris.inline.hpp" 34 #endif 35 #ifdef TARGET_OS_FAMILY_windows 36 # include "os_windows.inline.hpp" 37 # include "thread_windows.inline.hpp" 38 #endif 39 40 // static member initialization 41 int ThreadLocalStorage::_thread_index = -1; 42 43 Thread* ThreadLocalStorage::get_thread_slow() { 44 return (Thread*) os::thread_local_storage_at(ThreadLocalStorage::thread_index()); 45 } 46 47 void ThreadLocalStorage::set_thread(Thread* thread) { 48 pd_set_thread(thread); 49 50 // The following ensure that any optimization tricks we have tried 51 // did not backfire on us: 52 guarantee(get_thread() == thread, "must be the same thread, quickly"); 53 guarantee(get_thread_slow() == thread, "must be the same thread, slowly"); 54 } 55 56 void ThreadLocalStorage::init() { 57 assert(!is_initialized(), 58 "More than one attempt to initialize threadLocalStorage"); 59 pd_init(); 60 set_thread_index(os::allocate_thread_local_storage()); 61 generate_code_for_get_thread(); 62 } 63 64 bool ThreadLocalStorage::is_initialized() { 65 return (thread_index() != -1); 66 }