ThreadLocal.cpp revision 218885
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/ThreadLocal.h" 16 17//===----------------------------------------------------------------------===// 18//=== WARNING: Implementation here must contain only TRULY operating system 19//=== independent code. 20//===----------------------------------------------------------------------===// 21 22#if !defined(ENABLE_THREADS) || ENABLE_THREADS == 0 23// Define all methods as no-ops if threading is explicitly disabled 24namespace llvm { 25using namespace sys; 26ThreadLocalImpl::ThreadLocalImpl() { } 27ThreadLocalImpl::~ThreadLocalImpl() { } 28void ThreadLocalImpl::setInstance(const void* d) { data = const_cast<void*>(d);} 29const void* ThreadLocalImpl::getInstance() { return data; } 30void ThreadLocalImpl::removeInstance() { data = 0; } 31} 32#else 33 34#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_GETSPECIFIC) 35 36#include <cassert> 37#include <pthread.h> 38#include <stdlib.h> 39 40namespace llvm { 41using namespace sys; 42 43ThreadLocalImpl::ThreadLocalImpl() : data(0) { 44 pthread_key_t* key = new pthread_key_t; 45 int errorcode = pthread_key_create(key, NULL); 46 assert(errorcode == 0); 47 (void) errorcode; 48 data = (void*)key; 49} 50 51ThreadLocalImpl::~ThreadLocalImpl() { 52 pthread_key_t* key = static_cast<pthread_key_t*>(data); 53 int errorcode = pthread_key_delete(*key); 54 assert(errorcode == 0); 55 (void) errorcode; 56 delete key; 57} 58 59void ThreadLocalImpl::setInstance(const void* d) { 60 pthread_key_t* key = static_cast<pthread_key_t*>(data); 61 int errorcode = pthread_setspecific(*key, d); 62 assert(errorcode == 0); 63 (void) errorcode; 64} 65 66const void* ThreadLocalImpl::getInstance() { 67 pthread_key_t* key = static_cast<pthread_key_t*>(data); 68 return pthread_getspecific(*key); 69} 70 71void ThreadLocalImpl::removeInstance() { 72 setInstance(0); 73} 74 75} 76 77#elif defined(LLVM_ON_UNIX) 78#include "Unix/ThreadLocal.inc" 79#elif defined( LLVM_ON_WIN32) 80#include "Windows/ThreadLocal.inc" 81#else 82#warning Neither LLVM_ON_UNIX nor LLVM_ON_WIN32 was set in System/ThreadLocal.cpp 83#endif 84#endif 85