/** * @file llatomic.h * @brief Base classes for atomic. * * $LicenseInfo:firstyear=2018&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2018, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #ifndef LL_LLATOMIC_H #define LL_LLATOMIC_H #include "stdtypes.h" #include <atomic> template <typename Type, typename AtomicType = std::atomic< Type > > class LLAtomicBase { public: LLAtomicBase() {}; LLAtomicBase(Type x) { mData.store(x); } ~LLAtomicBase() {}; operator const Type() { return mData; } Type CurrentValue() const { return mData; } Type operator =(const Type& x) { mData.store(x); return mData; } void operator -=(Type x) { mData -= x; } void operator +=(Type x) { mData += x; } Type operator ++(int) { return mData++; } Type operator --(int) { return mData--; } Type operator ++() { return ++mData; } Type operator --() { return --mData; } private: AtomicType mData; }; // Typedefs for specialized versions. Using std::atomic_(u)int32_t to get the optimzed implementation. #ifdef LL_WINDOWS typedef LLAtomicBase<U32, std::atomic_uint32_t> LLAtomicU32; typedef LLAtomicBase<S32, std::atomic_int32_t> LLAtomicS32; #else typedef LLAtomicBase<U32, std::atomic_uint> LLAtomicU32; typedef LLAtomicBase<S32, std::atomic_int> LLAtomicS32; #endif typedef LLAtomicBase<bool, std::atomic_bool> LLAtomicBool; #endif // LL_LLATOMIC_H