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Copy pathBenchmarkLifeSim.h
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325 lines (257 loc) · 8.51 KB
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// Copyright Sebastian Jeckel 2014.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#pragma once
#include <iostream>
#include <fstream>
#include <memory>
#include <random>
#include <utility>
#include <string>
#include <type_traits>
#include <tuple>
#include <vector>
#include "BenchmarkBase.h"
#include "react/Domain.h"
#include "react/Signal.h"
#include "react/Event.h"
#include "react/logging/EventLog.h"
using namespace react;
using std::cout;
using std::string;
using std::unique_ptr;
using std::vector;
// FIXME: GCC doesn't like enum class in MakeEventSource
enum { summer, winter };
enum { enter, leave };
template <typename T>
struct Incrementer { T operator()(Token,T v) const { return v+1; } };
using PositionT = std::pair<int,int>;
using BoundsT = std::tuple<int,int,int,int>;
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Time
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename D>
class Time
{
public:
USING_REACTIVE_DOMAIN(D)
EventSourceT<> NewDay = MakeEventSource<D>();
SignalT<int> TotalDays = Iterate(NewDay, 0, Incrementer<int>());
SignalT<int> DayOfYear = TotalDays % 365;
SignalT<int> Season = MakeSignal(
DayOfYear,
[] (int day) -> int {
return day < 180 ? winter : summer;
});
};
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Region
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename D>
class Region
{
Time<D>& theTime;
public:
USING_REACTIVE_DOMAIN(D)
BoundsT Bounds;
EventSourceT<int> EnterOrLeave = MakeEventSource<D,int>();
SignalT<int> AnimalCount = Iterate(
EnterOrLeave,
0,
[] (int m, int count) {
return m == enter ? count + 1 : count - 1;
});
SignalT<int> FoodPerDay = MakeSignal(
theTime.Season,
calculateFoodPerDay);
SignalT<int> FoodOutputPerDay = MakeSignal(
With(FoodPerDay,AnimalCount),
calculateFoodOutputPerDay);
EventsT<int> FoodOutput = Pulse(theTime.NewDay, FoodOutputPerDay);
Region(Time<D>& time, int x, int y) :
theTime( time ),
Bounds( x*10, x*10+9, y*10, y*10+9 )
{}
PositionT Center() const
{
using std::get;
return PositionT(get<0>(Bounds) + 5, get<2>(Bounds) + 5);
}
PositionT Clamp(PositionT pos) const
{
using std::get;
pos.first = get<0>(Bounds) + (abs(pos.first) % 10);
pos.second = get<2>(Bounds) + (abs(pos.second) % 10);
return pos;
}
bool IsInRegion(PositionT pos) const
{
using std::get;
return get<0>(Bounds) <= pos.first && pos.first <= get<1>(Bounds) &&
get<2>(Bounds) <= pos.second && pos.second <= get<3>(Bounds);
}
private:
static int calculateFoodPerDay(int season)
{
return season == summer ? 20 : 10;
}
static int calculateFoodOutputPerDay(int food, int count)
{
return count > 0 ? food/count : 0;
}
};
///////////////////////////////////////////////////////////////////////////////////////////////////
/// World
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename D>
class World
{
public:
USING_REACTIVE_DOMAIN(D)
vector<unique_ptr<Region<D>>> Regions;
World(Time<D>& time, int w) :
w_( w )
{
for (int x=0; x<w; x++)
for (int y=0; y<w; y++)
Regions.push_back(unique_ptr<Region<D>>(new Region<D>(time, x, y)));
}
Region<D>* GetRegion(PositionT pos)
{
for (auto& r : Regions)
{
if (r->IsInRegion(pos))
return r.get();
}
//printf("Out of bounds %d %d\n", pos.first, pos.second);
assert(false);
return nullptr;
}
PositionT Clamp(PositionT pos) const
{
pos.first = abs(pos.first) % 10*w_;
pos.second = abs(pos.second) % 10*w_;
return pos;
}
private:
int w_;
};
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Animal
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename D>
class Animal
{
Time<D>& theTime;
World<D>& theWorld;
std::mt19937 generator;
public:
USING_REACTIVE_DOMAIN(D)
VarSignalT<Region<D>*> CurrentRegion;
EventsT<int> FoodReceived = REACTIVE_PTR(CurrentRegion, FoodOutput);
SignalT<bool> ShouldMigrate = Hold(FoodReceived, 0) < 10;
EventsT<bool> Moving = Pulse(theTime.NewDay, ShouldMigrate);
SignalT<PositionT> Position;
SignalT<Region<D>*> NewRegion;
EventsT<Region<D>*> RegionChanged = Monitor(NewRegion);
SignalT<int> Age = Iterate(theTime.NewDay, 0, Incrementer<int>());
SignalT<int> Health = Iterate(FoodReceived, 100, calculateHealth);
Animal(Time<D>& time, World<D>& world, Region<D>* initRegion, unsigned seed) :
theTime( time ),
theWorld( world ),
generator( seed ),
CurrentRegion( MakeVar<D>(initRegion) ),
Position
(
Iterate(Moving, initRegion->Center(), With(CurrentRegion),
[this] (bool moving, PositionT position, Region<D>* region) {
std::uniform_int_distribution<int> dist(-1,1);
// Wander randomly
for (int i=0; i<100; i++)
{
position.first += dist(generator);
position.second += dist(generator);
}
// Should migrate?
if (moving)
return theWorld.Clamp(position);
else
return region->Clamp(position);
})
),
NewRegion
(
MakeSignal(Position,
[this] (PositionT pos) {
return theWorld.GetRegion(pos);
})
),
regionChangeContinuation_
(
MakeContinuation(RegionChanged, With(CurrentRegion),
[this] (Region<D>* newRegion, Region<D>* oldRegion) {
oldRegion->EnterOrLeave(leave);
newRegion->EnterOrLeave(enter);
// Change region in continuation
CurrentRegion <<= newRegion;
})
)
{
initRegion->EnterOrLeave(enter);
}
private:
Continuation<D> regionChangeContinuation_;
static int calculateHealth(int food, int health)
{
auto newHealth = health + food - 10;
return newHealth < 0 ? 0 : newHealth > 10000 ? 10000 : newHealth;
}
};
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Run simulation
///////////////////////////////////////////////////////////////////////////////////////////////////
struct BenchmarkParams_LifeSim
{
BenchmarkParams_LifeSim(int n, int w, int k) :
N( n ), W( w ), K( k )
{}
void Print(std::ostream& out) const
{
out << "N = " << N
<< ", K = " << K
<< ", W = " << W;
}
const int N;
const int W;
const int K;
};
template <typename D>
struct Benchmark_LifeSim : public BenchmarkBase<D>
{
double Run(const BenchmarkParams_LifeSim& params)
{
Time<D> theTime;
World<D> theWorld( theTime, params.W );
vector<unique_ptr<Animal<D>>> animals;
std::mt19937 gen( 2015 );
std::uniform_int_distribution<size_t> dist( 0u, theWorld.Regions.size()-1 );
for (int i=0; i<params.N; i++)
{
auto r = theWorld.Regions[dist(gen)].get();
animals.push_back(unique_ptr<Animal<D>>(new Animal<D>(theTime, theWorld, r, i+1)));
}
// WHEEL IN THE SKY KEEPS ON TURNING
auto t0 = tbb::tick_count::now();
for (int i=0; i<params.K; i++)
theTime.NewDay();
auto t1 = tbb::tick_count::now();
double d = (t1 - t0).seconds();
/* std::ofstream logfile;
logfile.open("log.txt");
D::Log().Write(logfile);
logfile.close()*/;
return d;
}
};