52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
//= llvm/Support/Win32/ThreadLocal.inc - Win32 Thread Local Data -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Win32 specific (non-pthread) ThreadLocal class.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic Win32 code that
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//=== is guaranteed to work on *all* Win32 variants.
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Windows/WindowsSupport.h"
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#include "llvm/Support/ThreadLocal.h"
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namespace llvm {
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sys::ThreadLocalImpl::ThreadLocalImpl() : data() {
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static_assert(sizeof(DWORD) <= sizeof(data), "size too big");
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DWORD* tls = reinterpret_cast<DWORD*>(&data);
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*tls = TlsAlloc();
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assert(*tls != TLS_OUT_OF_INDEXES);
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}
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sys::ThreadLocalImpl::~ThreadLocalImpl() {
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DWORD* tls = reinterpret_cast<DWORD*>(&data);
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TlsFree(*tls);
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}
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void *sys::ThreadLocalImpl::getInstance() {
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DWORD* tls = reinterpret_cast<DWORD*>(&data);
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return TlsGetValue(*tls);
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}
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void sys::ThreadLocalImpl::setInstance(const void* d){
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DWORD* tls = reinterpret_cast<DWORD*>(&data);
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int errorcode = TlsSetValue(*tls, const_cast<void*>(d));
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assert(errorcode != 0);
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(void)errorcode;
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}
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void sys::ThreadLocalImpl::removeInstance() {
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setInstance(0);
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}
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}
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