cpp.react/src/engine/ToposortEngine.cpp at master · youngkan/cpp.react · GitHub

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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)

#include "react/engine/ToposortEngine.h"

#include "tbb/parallel_for.h"

/***************************************/ REACT_IMPL_BEGIN /**************************************/

namespace toposort {

///////////////////////////////////////////////////////////////////////////////////////////////////

/// SeqTurn

///////////////////////////////////////////////////////////////////////////////////////////////////

SeqTurn::SeqTurn(TurnIdT id, TransactionFlagsT flags) :

TurnBase( id, flags )

{}

///////////////////////////////////////////////////////////////////////////////////////////////////

/// ParTurn

///////////////////////////////////////////////////////////////////////////////////////////////////

ParTurn::ParTurn(TurnIdT id, TransactionFlagsT flags) :

TurnBase( id, flags )

{}

///////////////////////////////////////////////////////////////////////////////////////////////////

/// EngineBase

///////////////////////////////////////////////////////////////////////////////////////////////////

template <typename TNode, typename TTurn>

void EngineBase<TNode,TTurn>::OnNodeAttach(TNode& node, TNode& parent)

{

parent.Successors.Add(node);

if (node.Level <= parent.Level)

node.Level = parent.Level + 1;

}

template <typename TNode, typename TTurn>

void EngineBase<TNode,TTurn>::OnNodeDetach(TNode& node, TNode& parent)

{

parent.Successors.Remove(node);

}

template <typename TNode, typename TTurn>

void EngineBase<TNode,TTurn>::OnInputChange(TNode& node, TTurn& turn)

{

processChildren(node, turn);

}

template <typename TNode, typename TTurn>

void EngineBase<TNode,TTurn>::OnNodePulse(TNode& node, TTurn& turn)

{

processChildren(node, turn);

}

// Explicit instantiation

template class EngineBase<SeqNode,SeqTurn>;

template class EngineBase<ParNode,ParTurn>;

///////////////////////////////////////////////////////////////////////////////////////////////////

/// SeqEngineBase

///////////////////////////////////////////////////////////////////////////////////////////////////

void SeqEngineBase::Propagate(SeqTurn& turn)

{

while (scheduledNodes_.FetchNext())

{

for (auto* curNode : scheduledNodes_.NextValues())

{

if (curNode->Level < curNode->NewLevel)

{

curNode->Level = curNode->NewLevel;

invalidateSuccessors(*curNode);

scheduledNodes_.Push(curNode);

continue;

}

curNode->Queued = false;

curNode->Tick(&turn);

}

void SeqEngineBase::OnDynamicNodeAttach(SeqNode& node, SeqNode& parent, SeqTurn& turn)

{

this->OnNodeAttach(node, parent);

invalidateSuccessors(node);

// Re-schedule this node

node.Queued = true;

scheduledNodes_.Push(&node);

}

void SeqEngineBase::OnDynamicNodeDetach(SeqNode& node, SeqNode& parent, SeqTurn& turn)

{

this->OnNodeDetach(node, parent);

}

void SeqEngineBase::processChildren(SeqNode& node, SeqTurn& turn)

{

// Add children to queue

for (auto* succ : node.Successors)

{

if (!succ->Queued)

{

succ->Queued = true;

scheduledNodes_.Push(succ);

}

void SeqEngineBase::invalidateSuccessors(SeqNode& node)

{

for (auto* succ : node.Successors)

{

if (succ->NewLevel <= node.Level)

succ->NewLevel = node.Level + 1;

}

///////////////////////////////////////////////////////////////////////////////////////////////////

/// ParEngineBase

///////////////////////////////////////////////////////////////////////////////////////////////////

void ParEngineBase::Propagate(ParTurn& turn)

{

while (topoQueue_.FetchNext())

{

//using RangeT = tbb::blocked_range<vector<ParNode*>::const_iterator>;

using RangeT = ParEngineBase::TopoQueueT::NextRangeT;

// Iterate all nodes of current level and start processing them in parallel

tbb::parallel_for(

topoQueue_.NextRange(),

[&] (const RangeT& range)

{

for (const auto& e : range)

{

auto* curNode = e.first;

if (curNode->Level < curNode->NewLevel)

{

curNode->Level = curNode->NewLevel;

invalidateSuccessors(*curNode);

topoQueue_.Push(curNode);

continue;

}

curNode->Collected = false;

// Tick -> if changed: OnNodePulse -> adds child nodes to the queue

curNode->Tick(&turn);

}

);

if (dynRequests_.size() > 0)

{

for (auto req : dynRequests_)

{

if (req.ShouldAttach)

applyDynamicAttach(*req.Node, *req.Parent, turn);

else

applyDynamicDetach(*req.Node, *req.Parent, turn);

}

dynRequests_.clear();

}

void ParEngineBase::OnDynamicNodeAttach(ParNode& node, ParNode& parent, ParTurn& turn)

{

DynRequestData data{ true, &node, &parent };

dynRequests_.push_back(data);

}

void ParEngineBase::OnDynamicNodeDetach(ParNode& node, ParNode& parent, ParTurn& turn)

{

DynRequestData data{ false, &node, &parent };

dynRequests_.push_back(data);

}

void ParEngineBase::applyDynamicAttach(ParNode& node, ParNode& parent, ParTurn& turn)

{

this->OnNodeAttach(node, parent);

invalidateSuccessors(node);

// Re-schedule this node

node.Collected = true;

topoQueue_.Push(&node);

}

void ParEngineBase::applyDynamicDetach(ParNode& node, ParNode& parent, ParTurn& turn)

{

this->OnNodeDetach(node, parent);

}

void ParEngineBase::processChildren(ParNode& node, ParTurn& turn)

{

// Add children to queue

for (auto* succ : node.Successors)

if (!succ->Collected.exchange(true, std::memory_order_relaxed))

topoQueue_.Push(succ);

}

void ParEngineBase::invalidateSuccessors(ParNode& node)

{

for (auto* succ : node.Successors)

{// succ->InvalidateMutex

ParNode::InvalidateMutexT::scoped_lock lock(succ->InvalidateMutex);

if (succ->NewLevel <= node.Level)

succ->NewLevel = node.Level + 1;

}// ~succ->InvalidateMutex

}

} // ~namespace toposort

/****************************************/ REACT_IMPL_END /***************************************/

cpp.react/src/engine/ToposortEngine.cpp at master · youngkan/cpp.react · GitHub

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