ThreadLocal.cpp revision 280031
1//===- ThreadLocal.cpp - 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 llvm::sys::ThreadLocal class. 11// 12//===----------------------------------------------------------------------===// 13 14#include "llvm/Config/config.h" 15#include "llvm/Support/Compiler.h" 16#include "llvm/Support/ThreadLocal.h" 17 18//===----------------------------------------------------------------------===// 19//=== WARNING: Implementation here must contain only TRULY operating system 20//=== independent code. 21//===----------------------------------------------------------------------===// 22 23#if !defined(LLVM_ENABLE_THREADS) || LLVM_ENABLE_THREADS == 0 24// Define all methods as no-ops if threading is explicitly disabled 25namespace llvm { 26using namespace sys; 27ThreadLocalImpl::ThreadLocalImpl() : data() { } 28ThreadLocalImpl::~ThreadLocalImpl() { } 29void ThreadLocalImpl::setInstance(const void* d) { 30 static_assert(sizeof(d) <= sizeof(data), "size too big"); 31 void **pd = reinterpret_cast<void**>(&data); 32 *pd = const_cast<void*>(d); 33} 34void *ThreadLocalImpl::getInstance() { 35 void **pd = reinterpret_cast<void**>(&data); 36 return *pd; 37} 38void ThreadLocalImpl::removeInstance() { 39 setInstance(nullptr); 40} 41} 42#elif defined(LLVM_ON_UNIX) 43#include "Unix/ThreadLocal.inc" 44#elif defined( LLVM_ON_WIN32) 45#include "Windows/ThreadLocal.inc" 46#else 47#warning Neither LLVM_ON_UNIX nor LLVM_ON_WIN32 set in Support/ThreadLocal.cpp 48#endif 49