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54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
//= llvm/Support/Win32/ThreadLocal.inc - Win32 Thread Local Data -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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 "Windows.h"
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#include "llvm/Support/ThreadLocal.h"
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namespace llvm {
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using namespace sys;
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ThreadLocalImpl::ThreadLocalImpl() : data() {
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typedef int SIZE_TOO_BIG[sizeof(DWORD) <= sizeof(data) ? 1 : -1];
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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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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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const void* 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 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 ThreadLocalImpl::removeInstance() {
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setInstance(0);
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}
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}
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