ThreadLocal.h revision 218885
1218885Sdim//===- llvm/Support/ThreadLocal.h - Thread Local Data ------------*- C++ -*-===// 2218885Sdim// 3218885Sdim// The LLVM Compiler Infrastructure 4218885Sdim// 5218885Sdim// This file is distributed under the University of Illinois Open Source 6218885Sdim// License. See LICENSE.TXT for details. 7218885Sdim// 8218885Sdim//===----------------------------------------------------------------------===// 9218885Sdim// 10218885Sdim// This file declares the llvm::sys::ThreadLocal class. 11218885Sdim// 12218885Sdim//===----------------------------------------------------------------------===// 13218885Sdim 14218885Sdim#ifndef LLVM_SYSTEM_THREAD_LOCAL_H 15218885Sdim#define LLVM_SYSTEM_THREAD_LOCAL_H 16218885Sdim 17218885Sdim#include "llvm/Support/Threading.h" 18218885Sdim#include <cassert> 19218885Sdim 20218885Sdimnamespace llvm { 21218885Sdim namespace sys { 22218885Sdim // ThreadLocalImpl - Common base class of all ThreadLocal instantiations. 23218885Sdim // YOU SHOULD NEVER USE THIS DIRECTLY. 24218885Sdim class ThreadLocalImpl { 25218885Sdim void* data; 26218885Sdim public: 27218885Sdim ThreadLocalImpl(); 28218885Sdim virtual ~ThreadLocalImpl(); 29218885Sdim void setInstance(const void* d); 30218885Sdim const void* getInstance(); 31218885Sdim void removeInstance(); 32218885Sdim }; 33218885Sdim 34218885Sdim /// ThreadLocal - A class used to abstract thread-local storage. It holds, 35218885Sdim /// for each thread, a pointer a single object of type T. 36218885Sdim template<class T> 37218885Sdim class ThreadLocal : public ThreadLocalImpl { 38218885Sdim public: 39218885Sdim ThreadLocal() : ThreadLocalImpl() { } 40218885Sdim 41218885Sdim /// get - Fetches a pointer to the object associated with the current 42218885Sdim /// thread. If no object has yet been associated, it returns NULL; 43218885Sdim T* get() { return static_cast<T*>(getInstance()); } 44218885Sdim 45218885Sdim // set - Associates a pointer to an object with the current thread. 46218885Sdim void set(T* d) { setInstance(d); } 47218885Sdim 48218885Sdim // erase - Removes the pointer associated with the current thread. 49218885Sdim void erase() { removeInstance(); } 50218885Sdim }; 51218885Sdim } 52218885Sdim} 53218885Sdim 54218885Sdim#endif 55