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6e0ea9d21c
Used compiled-based TLS when available. Additional contributions by Thomas Stufe (AIX) and Andrew Haley (Aarch64) Reviewed-by: stuefe, bdelsart, dcubed
64 lines
2.4 KiB
C++
64 lines
2.4 KiB
C++
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "runtime/threadLocalStorage.hpp"
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#include <windows.h>
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static DWORD _thread_key;
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static bool _initialized = false;
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void ThreadLocalStorage::init() {
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assert(!_initialized, "initializing TLS more than once!");
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_thread_key = TlsAlloc();
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// If this assert fails we will get a recursive assertion failure
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// and not see the actual error message or get a hs_err file
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assert(_thread_key != TLS_OUT_OF_INDEXES, "TlsAlloc failed: out of indices");
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_initialized = true;
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}
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bool ThreadLocalStorage::is_initialized() {
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return _initialized;
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}
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Thread* ThreadLocalStorage::thread() {
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// If this assert fails we will get a recursive assertion failure
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// and not see the actual error message or get a hs_err file.
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// Which most likely indicates we have taken an error path early in
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// the initialization process, which is using Thread::current without
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// checking TLS is initialized - see java.cpp vm_exit
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assert(_initialized, "TLS not initialized yet!");
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Thread* current = (Thread*) TlsGetValue(_thread_key);
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assert(current != 0 || GetLastError() == ERROR_SUCCESS,
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"TlsGetValue failed with error code: %lu", GetLastError());
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return current;
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}
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void ThreadLocalStorage::set_thread(Thread* current) {
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assert(_initialized, "TLS not initialized yet!");
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BOOL res = TlsSetValue(_thread_key, current);
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assert(res, "TlsSetValue failed with error code: %lu", GetLastError());
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}
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