1//= llvm/Support/Win32/ThreadLocal.inc - Win32 Thread Local Data -*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the Win32 specific (non-pthread) ThreadLocal class. 11// 12//===----------------------------------------------------------------------===// 13 14//===----------------------------------------------------------------------===// 15//=== WARNING: Implementation here must contain only generic Win32 code that 16//=== is guaranteed to work on *all* Win32 variants. 17//===----------------------------------------------------------------------===// 18 19#include "WindowsSupport.h" 20#include "llvm/Support/ThreadLocal.h" 21 22namespace llvm { 23using namespace sys; 24 25ThreadLocalImpl::ThreadLocalImpl() : data() { 26 typedef int SIZE_TOO_BIG[sizeof(DWORD) <= sizeof(data) ? 1 : -1]; 27 DWORD* tls = reinterpret_cast<DWORD*>(&data); 28 *tls = TlsAlloc(); 29 assert(*tls != TLS_OUT_OF_INDEXES); 30} 31 32ThreadLocalImpl::~ThreadLocalImpl() { 33 DWORD* tls = reinterpret_cast<DWORD*>(&data); 34 TlsFree(*tls); 35} 36 37const void* ThreadLocalImpl::getInstance() { 38 DWORD* tls = reinterpret_cast<DWORD*>(&data); 39 return TlsGetValue(*tls); 40} 41 42void ThreadLocalImpl::setInstance(const void* d){ 43 DWORD* tls = reinterpret_cast<DWORD*>(&data); 44 int errorcode = TlsSetValue(*tls, const_cast<void*>(d)); 45 assert(errorcode != 0); 46 (void)errorcode; 47} 48 49void ThreadLocalImpl::removeInstance() { 50 setInstance(0); 51} 52 53} 54