| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "runtime/threadLocalStorage.hpp" |
| #include <windows.h> |
| |
| static DWORD _thread_key; |
| static bool _initialized = false; |
| |
| |
| void ThreadLocalStorage::init() { |
| assert(!_initialized, "initializing TLS more than once!"); |
| _thread_key = TlsAlloc(); |
| // If this assert fails we will get a recursive assertion failure |
| // and not see the actual error message or get a hs_err file |
| assert(_thread_key != TLS_OUT_OF_INDEXES, "TlsAlloc failed: out of indices"); |
| _initialized = true; |
| } |
| |
| bool ThreadLocalStorage::is_initialized() { |
| return _initialized; |
| } |
| |
| Thread* ThreadLocalStorage::thread() { |
| // If this assert fails we will get a recursive assertion failure |
| // and not see the actual error message or get a hs_err file. |
| // Which most likely indicates we have taken an error path early in |
| // the initialization process, which is using Thread::current without |
| // checking TLS is initialized - see java.cpp vm_exit |
| assert(_initialized, "TLS not initialized yet!"); |
| Thread* current = (Thread*) TlsGetValue(_thread_key); |
| assert(current != 0 || GetLastError() == ERROR_SUCCESS, |
| "TlsGetValue failed with error code: %lu", GetLastError()); |
| return current; |
| } |
| |
| void ThreadLocalStorage::set_thread(Thread* current) { |
| assert(_initialized, "TLS not initialized yet!"); |
| BOOL res = TlsSetValue(_thread_key, current); |
| assert(res, "TlsSetValue failed with error code: %lu", GetLastError()); |
| } |