72080e79e9
llmath::llround->ll_round LL_ICC->LL_INTELC Add llpredicate Add LL_CPP11 macro Remove llhash Update llinitparam, llsd and all relatives of it.
104 lines
3.7 KiB
C++
104 lines
3.7 KiB
C++
/**
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* @file llatomic.h
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* @brief Definition of LLAtomic
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*
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* $LicenseInfo:firstyear=2004&license=viewergpl$
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*
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* Copyright (c) 2004-2009, Linden Research, Inc.
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* Copyright (c) 2012, Aleric Inglewood
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLATOMIC_H
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#define LL_LLATOMIC_H
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#define USE_BOOST_ATOMIC
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//Internal definitions
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#define NEEDS_APR_ATOMICS do_not_define_manually_thanks
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#undef NEEDS_APR_ATOMICS
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#if defined(USE_BOOST_ATOMIC)
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#include "boost/version.hpp"
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#endif
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//Prefer boost over stl over apr.
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#if defined(USE_BOOST_ATOMIC) && (BOOST_VERSION >= 105300)
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#include "boost/atomic.hpp"
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template<typename T>
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struct impl_atomic_type { typedef boost::atomic<T> type; };
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#elif defined(USE_STD_ATOMIC) && defined(LL_CPP11)
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#include <atomic>
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template<typename T>
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struct impl_atomic_type { typedef std::atomic<T> type; };
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#else
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#include "apr_atomic.h"
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#define NEEDS_APR_ATOMICS
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template <typename Type> class LLAtomic32
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{
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public:
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LLAtomic32(void) { }
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LLAtomic32(LLAtomic32 const& atom) { apr_uint32_t data = apr_atomic_read32(const_cast<apr_uint32_t*>(&atom.mData)); apr_atomic_set32(&mData, data); }
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LLAtomic32(Type x) { apr_atomic_set32(&mData, static_cast<apr_uint32_t>(x)); }
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LLAtomic32& operator=(LLAtomic32 const& atom) { apr_uint32_t data = apr_atomic_read32(const_cast<apr_uint32_t*>(&atom.mData)); apr_atomic_set32(&mData, data); return *this; }
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operator Type() const { apr_uint32_t data = apr_atomic_read32(const_cast<apr_uint32_t*>(&mData)); return static_cast<Type>(data); }
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void operator=(Type x) { apr_atomic_set32(&mData, static_cast<apr_uint32_t>(x)); }
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void operator-=(Type x) { apr_atomic_sub32(&mData, static_cast<apr_uint32_t>(x)); }
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void operator+=(Type x) { apr_atomic_add32(&mData, static_cast<apr_uint32_t>(x)); }
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Type operator++(int) { return apr_atomic_inc32(&mData); } // Type++
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bool operator--() { return apr_atomic_dec32(&mData); } // Returns (--Type != 0)
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private:
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apr_uint32_t mData;
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};
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#endif
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#if !defined(NEEDS_APR_ATOMICS)
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template <typename Type> class LLAtomic32
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{
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public:
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LLAtomic32(void) { }
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LLAtomic32(LLAtomic32 const& atom) { mData = Type(atom.mData); }
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LLAtomic32(Type x) { mData = x; }
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LLAtomic32& operator=(LLAtomic32 const& atom) { mData = Type(atom.mData); return *this; }
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operator Type() const { return mData; }
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void operator=(Type x) { mData = x; }
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void operator-=(Type x) { mData -= x; }
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void operator+=(Type x) { mData += x; }
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Type operator++(int) { return mData++; } // Type++
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bool operator--() { return --mData; } // Returns (--Type != 0)
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private:
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typename impl_atomic_type<Type>::type mData;
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};
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#endif
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typedef LLAtomic32<U32> LLAtomicU32;
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typedef LLAtomic32<S32> LLAtomicS32;
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#endif
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