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 { 23 24sys::ThreadLocalImpl::ThreadLocalImpl() : data() { 25 static_assert(sizeof(DWORD) <= sizeof(data), "size too big"); 26 DWORD* tls = reinterpret_cast<DWORD*>(&data); 27 *tls = TlsAlloc(); 28 assert(*tls != TLS_OUT_OF_INDEXES); 29} 30 31sys::ThreadLocalImpl::~ThreadLocalImpl() { 32 DWORD* tls = reinterpret_cast<DWORD*>(&data); 33 TlsFree(*tls); 34} 35 36void *sys::ThreadLocalImpl::getInstance() { 37 DWORD* tls = reinterpret_cast<DWORD*>(&data); 38 return TlsGetValue(*tls); 39} 40 41void sys::ThreadLocalImpl::setInstance(const void* d){ 42 DWORD* tls = reinterpret_cast<DWORD*>(&data); 43 int errorcode = TlsSetValue(*tls, const_cast<void*>(d)); 44 assert(errorcode != 0); 45 (void)errorcode; 46} 47 48void sys::ThreadLocalImpl::removeInstance() { 49 setInstance(0); 50} 51 52} 53