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 25 namespace llvm { 26 using namespace sys; 27 ThreadLocalImpl::ThreadLocalImpl() : data() { } 28 ThreadLocalImpl::~ThreadLocalImpl() { } 29 void 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 } 34 void *ThreadLocalImpl::getInstance() { 35 void **pd = reinterpret_cast<void**>(&data); 36 return *pd; 37 } 38 void 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
