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jeanlemotan
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///////////////////////////////////////////////////////////////////////////////
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// Copyright (c) Electronic Arts Inc. All rights reserved.
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///////////////////////////////////////////////////////////////////////////////
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#if defined(EA_PRAGMA_ONCE_SUPPORTED)
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#pragma once // Some compilers (e.g. VC++) benefit significantly from using this. We've measured 3-4% build speed improvements in apps as a result.
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#endif
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/////////////////////////////////////////////////////////////////////////////
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// Defines functionality for threadsafe primitive operations.
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/////////////////////////////////////////////////////////////////////////////
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#ifndef EATHREAD_APPLE_EATHREAD_ATOMIC_APPLE_H
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#define EATHREAD_APPLE_EATHREAD_ATOMIC_APPLE_H
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#include <EABase/eabase.h>
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#include <stddef.h>
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#include <libkern/OSAtomic.h>
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#include "eathread/internal/atomic.h"
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#include "eathread/internal/eathread_atomic_standalone.h"
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#define EA_THREAD_ATOMIC_IMPLEMENTED
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namespace EA
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{
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namespace Thread
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{
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/// class AtomicInt
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/// Actual implementation may vary per platform. May require certain alignments, sizes,
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/// and declaration specifications per platform.
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template <class T>
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class AtomicInt
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{
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public:
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typedef AtomicInt<T> ThisType;
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typedef T ValueType;
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/// AtomicInt
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/// Empty constructor. Intentionally leaves mValue in an unspecified state.
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/// This is done so that an AtomicInt acts like a standard built-in integer.
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AtomicInt()
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{ }
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AtomicInt(ValueType n)
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{ SetValue(n); }
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AtomicInt(const ThisType& x)
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: mValue(x.GetValue()) { }
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AtomicInt& operator=(const ThisType& x)
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{ mValue = x.GetValue(); return *this; }
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ValueType GetValue() const
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{ return mValue; }
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ValueType GetValueRaw() const
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{ return mValue; }
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ValueType SetValue(ValueType n);
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bool SetValueConditional(ValueType n, ValueType condition);
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ValueType Increment();
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ValueType Decrement();
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ValueType Add(ValueType n);
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// operators
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inline operator const ValueType() const { return GetValue(); }
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inline ValueType operator =(ValueType n) { SetValue(n); return n; }
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inline ValueType operator+=(ValueType n) { return Add(n);}
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inline ValueType operator-=(ValueType n) { return Add(-n);}
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inline ValueType operator++() { return Increment();}
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inline ValueType operator++(int) { return Increment() - 1;}
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inline ValueType operator--() { return Decrement(); }
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inline ValueType operator--(int) { return Decrement() + 1;}
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protected:
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volatile ValueType mValue;
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};
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template <>
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class AtomicInt<uint64_t>
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{
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public:
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typedef AtomicInt<uint64_t> ThisType;
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typedef uint64_t ValueType;
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/// AtomicInt
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/// Empty constructor. Intentionally leaves mValue in an unspecified state.
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/// This is done so that an AtomicInt acts like a standard built-in integer.
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AtomicInt()
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{}
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AtomicInt(ValueType n)
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{ SetValue(n); }
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AtomicInt(const ThisType& x)
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: mValue(x.GetValue()) {}
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AtomicInt& operator=(const ThisType& x)
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{ mValue = x.GetValue(); return *this; }
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ValueType GetValue() const
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{ return (uint64_t)AtomicGetValue64((volatile int64_t *)&mValue); }
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ValueType GetValueRaw() const
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{ return mValue; }
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ValueType SetValue(ValueType n)
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{ return (uint64_t)AtomicSetValue64((volatile int64_t *)&mValue, n); }
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bool SetValueConditional(ValueType n, ValueType condition)
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{ return AtomicSetValueConditional64((volatile int64_t *)&mValue, n, condition); }
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ValueType Increment()
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{ return (uint64_t)AtomicAdd64((volatile int64_t *)&mValue, 1); }
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ValueType Decrement()
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{ return (uint64_t)AtomicAdd64((volatile int64_t *)&mValue, -1); }
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ValueType Add(ValueType n)
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{ return (uint64_t)AtomicAdd64((volatile int64_t *)&mValue, n); }
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// operators
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inline operator const ValueType() const { return GetValue(); }
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inline ValueType operator =(ValueType n) { SetValue(n); return n; }
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inline ValueType operator+=(ValueType n) { return Add(n);}
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inline ValueType operator-=(ValueType n) { return Add(-n);}
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inline ValueType operator++() { return Increment();}
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inline ValueType operator++(int) { return Increment() - 1;}
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inline ValueType operator--() { return Decrement(); }
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inline ValueType operator--(int) { return Decrement() + 1;}
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protected:
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volatile ValueType mValue;
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}__attribute__((aligned(8)));
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template <>
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class AtomicInt<int64_t>
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{
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public:
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typedef AtomicInt<int64_t> ThisType;
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typedef int64_t ValueType;
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/// AtomicInt
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/// Empty constructor. Intentionally leaves mValue in an unspecified state.
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/// This is done so that an AtomicInt acts like a standard built-in integer.
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AtomicInt()
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{}
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AtomicInt(ValueType n)
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{ SetValue(n); }
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AtomicInt(const ThisType& x)
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: mValue(x.GetValue()) {}
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AtomicInt& operator=(const ThisType& x)
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{ mValue = x.GetValue(); return *this; }
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ValueType GetValue() const
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{ return AtomicGetValue64((volatile int64_t *)&mValue); }
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ValueType GetValueRaw() const
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{ return mValue; }
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ValueType SetValue(ValueType n)
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{ return AtomicSetValue64((volatile int64_t *)&mValue, n); }
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bool SetValueConditional(ValueType n, ValueType condition)
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{ return AtomicSetValueConditional64((volatile int64_t *)&mValue, n, condition); }
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ValueType Increment()
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{ return AtomicAdd64((volatile int64_t *)&mValue, 1); }
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ValueType Decrement()
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{ return AtomicAdd64((volatile int64_t *)&mValue, -1); }
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ValueType Add(ValueType n)
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{ return AtomicAdd64((volatile int64_t *)&mValue, n); }
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// operators
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inline operator const ValueType() const { return GetValue(); }
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inline ValueType operator =(ValueType n) { SetValue(n); return n; }
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inline ValueType operator+=(ValueType n) { return Add(n);}
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inline ValueType operator-=(ValueType n) { return Add(-n);}
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inline ValueType operator++() { return Increment();}
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inline ValueType operator++(int) { return Increment() - 1;}
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inline ValueType operator--() { return Decrement(); }
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inline ValueType operator--(int) { return Decrement() + 1;}
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protected:
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volatile ValueType mValue;
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}__attribute__((aligned(8)));
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template <> inline
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AtomicInt<int32_t>::ValueType AtomicInt<int32_t>::GetValue() const
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{ return OSAtomicAdd32(0, reinterpret_cast<volatile int32_t*>(const_cast<ValueType*>(&mValue))); }
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template <> inline
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AtomicInt<uint32_t>::ValueType AtomicInt<uint32_t>::GetValue() const
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{ return OSAtomicAdd32(0, reinterpret_cast<volatile int32_t*>(const_cast<ValueType*>(&mValue))); }
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template <> inline
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AtomicInt<int32_t>::ValueType AtomicInt<int32_t>::SetValue(ValueType n)
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{
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int32_t old;
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do
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{
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old = mValue;
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}
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while ( ! OSAtomicCompareAndSwap32(old, n, reinterpret_cast<volatile int32_t*>(&mValue)));
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return old;
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}
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template <> inline
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AtomicInt<uint32_t>::ValueType AtomicInt<uint32_t>::SetValue(ValueType n)
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{
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uint32_t old;
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do
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{
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old = mValue;
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} while ( ! OSAtomicCompareAndSwap32(old, n, reinterpret_cast<volatile int32_t*>(&mValue)));
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return old;
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}
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template <> inline
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bool AtomicInt<int32_t>::SetValueConditional(ValueType n, ValueType condition)
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{ return OSAtomicCompareAndSwap32(condition, n, reinterpret_cast<volatile int32_t*>(&mValue)); }
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template <> inline
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bool AtomicInt<uint32_t>::SetValueConditional(ValueType n, ValueType condition)
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{ return OSAtomicCompareAndSwap32(condition, n, reinterpret_cast<volatile int32_t*>(&mValue)); }
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template <> inline
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AtomicInt<int32_t>::ValueType AtomicInt<int32_t>::Increment()
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{ return OSAtomicIncrement32(reinterpret_cast<volatile int32_t*>(&mValue)); }
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template <> inline
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AtomicInt<uint32_t>::ValueType AtomicInt<uint32_t>::Increment()
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{ return OSAtomicIncrement32(reinterpret_cast<volatile int32_t*>(&mValue)); }
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template <> inline
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AtomicInt<int32_t>::ValueType AtomicInt<int32_t>::Decrement()
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{ return OSAtomicDecrement32(reinterpret_cast<volatile int32_t*>(&mValue)); }
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template <> inline
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AtomicInt<uint32_t>::ValueType AtomicInt<uint32_t>::Decrement()
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{ return OSAtomicDecrement32(reinterpret_cast<volatile int32_t*>(&mValue)); }
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template <> inline
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AtomicInt<int32_t>::ValueType AtomicInt<int32_t>::Add(ValueType n)
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{ return OSAtomicAdd32(n, reinterpret_cast<volatile int32_t*>(&mValue)); }
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template <> inline
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AtomicInt<uint32_t>::ValueType AtomicInt<uint32_t>::Add(ValueType n)
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{ return OSAtomicAdd32(n, reinterpret_cast<volatile int32_t*>(&mValue)); }
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}
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}
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#endif
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