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PulsecountEngine.h
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147 lines (111 loc) · 4.2 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)
#ifndef REACT_DETAIL_ENGINE_PULSECOUNTENGINE_H_INCLUDED
#define REACT_DETAIL_ENGINE_PULSECOUNTENGINE_H_INCLUDED
#pragma once
#include "react/detail/Defs.h"
#include <atomic>
#include <type_traits>
#include <vector>
#include "tbb/task_group.h"
#include "tbb/spin_rw_mutex.h"
#include "tbb/task.h"
#include "react/common/Containers.h"
#include "react/common/Types.h"
#include "react/detail/EngineBase.h"
/***************************************/ REACT_IMPL_BEGIN /**************************************/
namespace pulsecount {
using std::atomic;
using std::vector;
using tbb::task;
using tbb::empty_task;
using tbb::spin_rw_mutex;
using tbb::task_list;
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Turn
///////////////////////////////////////////////////////////////////////////////////////////////////
class Turn : public TurnBase
{
public:
Turn(TurnIdT id, TransactionFlagsT flags);
};
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Node
///////////////////////////////////////////////////////////////////////////////////////////////////
enum class ENodeMark
{
unmarked,
visited,
should_update
};
enum class ENodeState
{
unchanged,
changed,
dyn_defer,
dyn_repeat
};
class Node : public IReactiveNode
{
public:
using ShiftMutexT = spin_rw_mutex;
inline void IncCounter() { counter_.fetch_add(1, std::memory_order_relaxed); }
inline bool DecCounter() { return counter_.fetch_sub(1, std::memory_order_relaxed) > 1; }
inline void SetCounter(int c) { counter_.store(c, std::memory_order_relaxed); }
inline ENodeMark Mark() const
{
return mark_.load(std::memory_order_relaxed);
}
inline void SetMark(ENodeMark mark)
{
mark_.store(mark, std::memory_order_relaxed);
}
inline bool ExchangeMark(ENodeMark mark)
{
return mark_.exchange(mark, std::memory_order_relaxed) != mark;
}
ShiftMutexT ShiftMutex;
NodeVector<Node> Successors;
ENodeState State = ENodeState::unchanged;
private:
atomic<int> counter_ { 0 };
atomic<ENodeMark> mark_ { ENodeMark::unmarked };
};
///////////////////////////////////////////////////////////////////////////////////////////////////
/// EngineBase
///////////////////////////////////////////////////////////////////////////////////////////////////
class EngineBase : public IReactiveEngine<Node,Turn>
{
public:
using NodeShiftMutexT = Node::ShiftMutexT;
using NodeVectT = vector<Node*>;
void OnNodeAttach(Node& node, Node& parent);
void OnNodeDetach(Node& node, Node& parent);
void OnInputChange(Node& node, Turn& turn);
void Propagate(Turn& turn);
void OnNodePulse(Node& node, Turn& turn);
void OnNodeIdlePulse(Node& node, Turn& turn);
void OnDynamicNodeAttach(Node& node, Node& parent, Turn& turn);
void OnDynamicNodeDetach(Node& node, Node& parent, Turn& turn);
private:
NodeVectT changedInputs_;
empty_task& rootTask_ = *new(task::allocate_root()) empty_task;
task_list spawnList_;
};
} // ~namespace pulsecount
/****************************************/ REACT_IMPL_END /***************************************/
/*****************************************/ REACT_BEGIN /*****************************************/
template <REACT_IMPL::EPropagationMode>
class PulsecountEngine;
template <>
class PulsecountEngine<REACT_IMPL::parallel_propagation> :
public REACT_IMPL::pulsecount::EngineBase
{};
/******************************************/ REACT_END /******************************************/
/***************************************/ REACT_IMPL_BEGIN /**************************************/
template <>
struct NodeUpdateTimerEnabled<PulsecountEngine<parallel_propagation>> : std::true_type {};
/****************************************/ REACT_IMPL_END /***************************************/
#endif // REACT_DETAIL_ENGINE_PULSECOUNTENGINE_H_INCLUDED