File indexing completed on 2024-04-28 05:46:51
0001 /***************************************************************************** 0002 * Copyright 2015 - 2015 Yichao Yu <yyc1992@gmail.com> * 0003 * * 0004 * This program is free software; you can redistribute it and/or modify * 0005 * it under the terms of the GNU Lesser General Public License as * 0006 * published by the Free Software Foundation; either version 2.1 of the * 0007 * License, or (at your option) version 3, or any later version accepted * 0008 * by the membership of KDE e.V. (or its successor approved by the * 0009 * membership of KDE e.V.), which shall act as a proxy defined in * 0010 * Section 6 of version 3 of the license. * 0011 * * 0012 * This program is distributed in the hope that it will be useful, * 0013 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 0014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * 0015 * Lesser General Public License for more details. * 0016 * * 0017 * You should have received a copy of the GNU Lesser General Public * 0018 * License along with this library. If not, * 0019 * see <http://www.gnu.org/licenses/>. * 0020 *****************************************************************************/ 0021 0022 #ifndef _QTC_UTILS_THREAD_H_ 0023 #define _QTC_UTILS_THREAD_H_ 0024 0025 #include <pthread.h> 0026 0027 // Replaces thread_local since clang on OSX doesn't really support it. 0028 template<typename T> 0029 class ThreadLocal { 0030 pthread_key_t m_key; 0031 public: 0032 ThreadLocal() 0033 { 0034 pthread_key_create(&m_key, [] (void *ptr) { 0035 delete reinterpret_cast<T*>(ptr); 0036 }); 0037 } 0038 ~ThreadLocal() 0039 { 0040 pthread_key_delete(m_key); 0041 } 0042 T* 0043 get() const 0044 { 0045 T *v = reinterpret_cast<T*>(pthread_getspecific(m_key)); 0046 if (!v) { 0047 v = new T(); 0048 pthread_setspecific(m_key, reinterpret_cast<void*>(v)); 0049 } 0050 return v; 0051 } 0052 T* 0053 operator->() const 0054 { 0055 return get(); 0056 } 0057 }; 0058 0059 #endif