/// <summary>
/// Constructs a {@code TerminalOp} that implements a functional reduce on
/// {@code double} values.
/// </summary>
/// <param name="identity"> the identity for the combining function </param>
/// <param name="operator"> the combining function </param>
/// <returns> a {@code TerminalOp} implementing the reduction </returns>
public static TerminalOp <Double, Double> MakeDouble(double identity, DoubleBinaryOperator @operator)
{
Objects.RequireNonNull(@operator);
//JAVA TO C# CONVERTER TODO TASK: Local classes are not converted by Java to C# Converter:
// class ReducingSink implements AccumulatingSink<Double, Double, ReducingSink>, Sink_OfDouble
// {
// private double state;
//
// @@Override public void begin(long size)
// {
// state = identity;
// }
//
// @@Override public void accept(double t)
// {
// state = @operator.applyAsDouble(state, t);
// }
//
// @@Override public Double get()
// {
// return state;
// }
//
// @@Override public void combine(ReducingSink other)
// {
// accept(other.state);
// }
// }
return(new ReduceOpAnonymousInnerClassHelper11());
}
/// <summary>
/// Subtask constructor </summary>
internal DoubleCumulateTask(DoubleCumulateTask parent, DoubleBinaryOperator function, double[] array, int origin, int fence, int threshold, int lo, int hi) : base(parent)
{
this.Function = function;
this.Array = array;
this.Origin = origin;
this.Fence = fence;
this.Threshold = threshold;
this.Lo = lo;
this.Hi = hi;
}
/// <summary>
/// Root task constructor </summary>
public DoubleCumulateTask(DoubleCumulateTask parent, DoubleBinaryOperator function, double[] array, int lo, int hi) : base(parent)
{
this.Function = function;
this.Array = array;
this.Lo = this.Origin = lo;
this.Hi = this.Fence = hi;
int p;
this.Threshold = (p = (hi - lo) / (ForkJoinPool.CommonPoolParallelism << 3)) <= MIN_PARTITION ? MIN_PARTITION : p;
}
/// <summary>
/// Constructs a {@code TerminalOp} that implements a functional reduce on
/// {@code double} values, producing an optional double result.
/// </summary>
/// <param name="operator"> the combining function </param>
/// <returns> a {@code TerminalOp} implementing the reduction </returns>
public static TerminalOp <Double, OptionalDouble> MakeDouble(DoubleBinaryOperator @operator)
{
Objects.RequireNonNull(@operator);
//JAVA TO C# CONVERTER TODO TASK: Local classes are not converted by Java to C# Converter:
// class ReducingSink implements AccumulatingSink<Double, java.util.OptionalDouble, ReducingSink>, Sink_OfDouble
// {
// private boolean empty;
// private double state;
//
// public void begin(long size)
// {
// empty = true;
// state = 0;
// }
//
// @@Override public void accept(double t)
// {
// if (empty)
// {
// empty = false;
// state = t;
// }
// else
// {
// state = @operator.applyAsDouble(state, t);
// }
// }
//
// @@Override public OptionalDouble get()
// {
// return empty ? OptionalDouble.empty() : OptionalDouble.of(state);
// }
//
// @@Override public void combine(ReducingSink other)
// {
// if (!other.empty)
// accept(other.state);
// }
// }
return(new ReduceOpAnonymousInnerClassHelper12());
}
public static Object Arith(Object a, Object b, ArithOpEnum op)
{
LongBinaryOperator integerFunc = integerOps[(int)op];
DoubleBinaryOperator floatFunc = floatOps[(int)op];
if (floatFunc == null)
{
long?x = LuaValue.ToInteger(a);
if (x != null)
{
long?y = LuaValue.ToInteger(b);
if (y != null)
{
return(integerFunc((long)x, (long)y));
}
}
}
else
{
if (integerFunc != null)
{
if (TypeExtension.TypeEqual <long>(a) &&
TypeExtension.TypeEqual <long>(b))
{
return(integerFunc((long)a, (long)b));
}
}
double?x = LuaValue.ToFloat(a);
if (x != null)
{
double?y = LuaValue.ToFloat(b);
if (y != null)
{
return(floatFunc((double)x, (double)y));
}
}
}
return(null);
}
/// <summary>Returns the result of applying the specified /// function of two variables (binary operator) to a double and an object of type T. /// The first argument is passed to the function, the second argument is self.</summary> public abstract T Apply(double firstArg, DoubleBinaryOperator binaryFunc);
/// <summary>Returns the result of applying the specified /// function of two variables (binary operator) to an object of type T and a double. /// The first argument is self, the second (double) is passed to the function.</summary> public abstract T Apply(DoubleBinaryOperator binaryFunc, double secondArg);
public DoubleAccumulator(DoubleBinaryOperator arg0, double arg1)
: base(ProxyCtor.I)
{
Instance.CallConstructor("(Ljava/util/function/DoubleBinaryOperator;D)V", arg0, arg1);
}
private readonly long Identity; // use long representation
/// <summary>
/// Creates a new instance using the given accumulator function
/// and identity element. </summary>
/// <param name="accumulatorFunction"> a side-effect-free function of two arguments </param>
/// <param name="identity"> identity (initial value) for the accumulator function </param>
public DoubleAccumulator(DoubleBinaryOperator accumulatorFunction, double identity)
{
this.Function = accumulatorFunction;
@base = this.Identity = Double.doubleToRawLongBits(identity);
}
internal SerializationProxy(DoubleAccumulator a)
{
Function = a.Function;
Identity = a.Identity;
Value = a.Get();
}
/// <summary>
/// Same as longAccumulate, but injecting long/double conversions
/// in too many places to sensibly merge with long version, given
/// the low-overhead requirements of this class. So must instead be
/// maintained by copy/paste/adapt.
/// </summary>
internal void DoubleAccumulate(double x, DoubleBinaryOperator fn, bool wasUncontended)
{
int h;
if ((h = Probe) == 0)
{
ThreadLocalRandom.Current(); // force initialization
h = Probe;
wasUncontended = true;
}
bool collide = false; // True if last slot nonempty
for (;;)
{
Cell[] @as;
Cell a;
int n;
long v;
if ((@as = Cells) != null && (n = @as.Length) > 0)
{
if ((a = @as[(n - 1) & h]) == null)
{
if (CellsBusy == 0) // Try to attach new Cell
{
Cell r = new Cell(Double.doubleToRawLongBits(x));
if (CellsBusy == 0 && CasCellsBusy())
{
bool created = false;
try // Recheck under lock
{
Cell[] rs;
int m, j;
if ((rs = Cells) != null && (m = rs.Length) > 0 && rs[j = (m - 1) & h] == null)
{
rs[j] = r;
created = true;
}
}
finally
{
CellsBusy = 0;
}
if (created)
{
break;
}
continue; // Slot is now non-empty
}
}
collide = false;
}
else if (!wasUncontended) // CAS already known to fail
{
wasUncontended = true; // Continue after rehash
}
else if (a.Cas(v = a.Value, ((fn == null) ? Double.doubleToRawLongBits(Double.longBitsToDouble(v) + x) : Double.doubleToRawLongBits(fn.ApplyAsDouble(Double.longBitsToDouble(v), x)))))
{
break;
}
else if (n >= NCPU || Cells != @as)
{
collide = false; // At max size or stale
}
else if (!collide)
{
collide = true;
}
else if (CellsBusy == 0 && CasCellsBusy())
{
try
{
if (Cells == @as) // Expand table unless stale
{
Cell[] rs = new Cell[n << 1];
for (int i = 0; i < n; ++i)
{
rs[i] = @as[i];
}
Cells = rs;
}
}
finally
{
CellsBusy = 0;
}
collide = false;
continue; // Retry with expanded table
}
h = AdvanceProbe(h);
}
else if (CellsBusy == 0 && Cells == @as && CasCellsBusy())
{
bool init = false;
try // Initialize table
{
if (Cells == @as)
{
Cell[] rs = new Cell[2];
rs[h & 1] = new Cell(Double.doubleToRawLongBits(x));
Cells = rs;
init = true;
}
}
finally
{
CellsBusy = 0;
}
if (init)
{
break;
}
}
else if (CasBase(v = @base, ((fn == null) ? Double.doubleToRawLongBits(Double.longBitsToDouble(v) + x) : Double.doubleToRawLongBits(fn.ApplyAsDouble(Double.longBitsToDouble(v), x)))))
{
break; // Fall back on using base
}
}
}
