AtomicInt32
Various atomic operations for Int32 data type
accessible as extension methods.
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Threading;
namespace DotNext.Threading
{
public static class AtomicInt32
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int VolatileRead([In] [IsReadOnly] ref int value)
{
return Volatile.Read(ref Unsafe.AsRef(ref value));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void VolatileWrite(ref int value, int newValue)
{
Volatile.Write(ref value, newValue);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int IncrementAndGet(ref int value)
{
return Interlocked.Increment(ref value);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int DecrementAndGet(ref int value)
{
return Interlocked.Decrement(ref value);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool CompareAndSet(ref int value, int expected, int update)
{
return Interlocked.CompareExchange(ref value, update, expected) == expected;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int AddAndGet(ref int value, int operand)
{
return Interlocked.Add(ref value, operand);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int GetAndAdd(ref int value, int operand)
{
return Accumulate(ref value, operand, default(Adder)).OldValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int GetAndBitwiseAnd(ref int value, int operand)
{
return Interlocked.And(ref value, operand);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int BitwiseAndAndGet(ref int value, int operand)
{
return Interlocked.And(ref value, operand) & operand;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int GetAndBitwiseOr(ref int value, int operand)
{
return Interlocked.Or(ref value, operand);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int BitwiseOrAndGet(ref int value, int operand)
{
return Interlocked.Or(ref value, operand) | operand;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int GetAndBitwiseXor(ref int value, int operand)
{
return Accumulate(ref value, operand, default(BitwiseXor)).OldValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int BitwiseXorAndGet(ref int value, int operand)
{
return Accumulate(ref value, operand, default(BitwiseXor)).NewValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int GetAndSet(ref int value, int update)
{
return Interlocked.Exchange(ref value, update);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int SetAndGet(ref int value, int update)
{
ref value.VolatileWrite(update);
return update;
}
private static (int OldValue, int NewValue) Update<TUpdater>(ref int value, TUpdater updater) where TUpdater : struct, ISupplier<int, int>
{
int num = Volatile.Read(ref value);
int num3;
int num2;
do {
num3 = ((ISupplier<int, int>)updater).Invoke(num2 = num);
} while ((num = Interlocked.CompareExchange(ref value, num3, num2)) != num2);
return (num2, num3);
}
private static (int OldValue, int NewValue) Accumulate<TAccumulator>(ref int value, int x, TAccumulator accumulator) where TAccumulator : struct, ISupplier<int, int, int>
{
int num = Volatile.Read(ref value);
int num3;
int num2;
do {
num3 = ((ISupplier<int, int, int>)accumulator).Invoke(num2 = num, x);
} while ((num = Interlocked.CompareExchange(ref value, num3, num2)) != num2);
return (num2, num3);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[System.Runtime.CompilerServices.NullableContext(1)]
public static int AccumulateAndGet(ref int value, int x, Func<int, int, int> accumulator)
{
return Accumulate(ref value, x, (DelegatingSupplier<int, int, int>)accumulator).NewValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[CLSCompliant(false)]
public static int AccumulateAndGet(ref int value, int x, IntPtr accumulator)
{
return Accumulate(ref value, x, (Supplier<int, int, int>)(long)accumulator).NewValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[System.Runtime.CompilerServices.NullableContext(1)]
public static int GetAndAccumulate(ref int value, int x, Func<int, int, int> accumulator)
{
return Accumulate(ref value, x, (DelegatingSupplier<int, int, int>)accumulator).OldValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[CLSCompliant(false)]
public static int GetAndAccumulate(ref int value, int x, IntPtr accumulator)
{
return Accumulate(ref value, x, (Supplier<int, int, int>)(long)accumulator).OldValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[System.Runtime.CompilerServices.NullableContext(1)]
public static int UpdateAndGet(ref int value, Func<int, int> updater)
{
return Update(ref value, (DelegatingSupplier<int, int>)updater).NewValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[CLSCompliant(false)]
public static int UpdateAndGet(ref int value, IntPtr updater)
{
return Update(ref value, (Supplier<int, int>)(long)updater).NewValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[System.Runtime.CompilerServices.NullableContext(1)]
public static int GetAndUpdate(ref int value, Func<int, int> updater)
{
return Update(ref value, (DelegatingSupplier<int, int>)updater).OldValue;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[CLSCompliant(false)]
public static int GetAndUpdate(ref int value, IntPtr updater)
{
return Update(ref value, (Supplier<int, int>)(long)updater).OldValue;
}
}
}