Matthias Volk
5 years ago
No known key found for this signature in database
GPG Key ID: 83A57678F739FCD3
7 changed files with 518 additions and 233 deletions
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5src/storm-dft/builder/ExplicitDFTModelBuilder.cpp
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124src/storm-dft/generator/DftNextStateGenerator.cpp
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11src/storm-dft/generator/DftNextStateGenerator.h
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29src/storm-dft/storage/dft/DFTState.cpp
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178src/storm-dft/storage/dft/DFTState.h
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163src/storm-dft/storage/dft/FailableElements.cpp
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241src/storm-dft/storage/dft/FailableElements.h
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#include "storm-dft/storage/dft/FailableElements.h"
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#include <sstream>
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#include "storm-dft/storage/dft/DFT.h"
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namespace storm { |
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namespace dft { |
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namespace storage { |
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FailableElements::const_iterator::const_iterator(bool dependency, bool conflicting, storm::storage::BitVector::const_iterator const& iterBE, std::list<size_t>::const_iterator const& iterDependency, std::list<size_t>::const_iterator nonConflictEnd, std::list<size_t>::const_iterator conflictBegin) |
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: dependency(dependency), conflicting(conflicting), itBE(iterBE), itDep(iterDependency), nonConflictEnd(nonConflictEnd), conflictBegin(conflictBegin) { |
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STORM_LOG_ASSERT(conflicting || itDep != nonConflictEnd, "No non-conflicting dependencies present."); |
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} |
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FailableElements::const_iterator& FailableElements::const_iterator::operator++() { |
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if (dependency) { |
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++itDep; |
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if (!conflicting && itDep == nonConflictEnd) { |
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// All non-conflicting dependencies considered -> start with conflicting ones
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conflicting = true; |
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itDep = conflictBegin; |
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} |
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} else { |
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++itBE; |
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} |
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return *this; |
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} |
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uint_fast64_t FailableElements::const_iterator::operator*() const { |
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if (dependency) { |
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return *itDep; |
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} else { |
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return *itBE; |
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} |
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} |
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bool FailableElements::const_iterator::operator!=(const_iterator const& other) const { |
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if (dependency != other.dependency || conflicting != other.conflicting) { |
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return true; |
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} |
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if (dependency) { |
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return itDep != other.itDep; |
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} else { |
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return itBE != other.itBE; |
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} |
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} |
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bool FailableElements::const_iterator::operator==(const_iterator const& other) const { |
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if (dependency != other.dependency || conflicting != other.conflicting) { |
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return false; |
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} |
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if (dependency) { |
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return itDep == other.itDep; |
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} else { |
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return itBE == other.itBE; |
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} |
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} |
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bool FailableElements::const_iterator::isFailureDueToDependency() const { |
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return dependency; |
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} |
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bool FailableElements::const_iterator::isConflictingDependency() const { |
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return conflicting; |
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} |
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template<typename ValueType> |
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std::pair<std::shared_ptr<storm::storage::DFTBE<ValueType> const>, std::shared_ptr<storm::storage::DFTDependency<ValueType> const>> FailableElements::const_iterator::getFailBE(storm::storage::DFT<ValueType> const& dft) const { |
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size_t nextFailId = **this; |
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if (isFailureDueToDependency()) { |
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// Consider failure due to dependency
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std::shared_ptr<storm::storage::DFTDependency<ValueType> const> dependency = dft.getDependency(nextFailId); |
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STORM_LOG_ASSERT(dependency->dependentEvents().size() == 1, "More than one dependent event"); |
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return std::make_pair(dft.getBasicElement(dependency->dependentEvents()[0]->id()), dependency); |
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} else { |
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// Consider "normal" failure
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return std::make_pair(dft.getBasicElement(nextFailId), nullptr); |
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} |
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} |
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void FailableElements::addBE(size_t id) { |
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currentlyFailableBE.set(id); |
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} |
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void FailableElements::addDependency(size_t id, bool isConflicting) { |
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std::list<size_t>& failableList = (isConflicting ? failableConflictingDependencies : failableNonconflictingDependencies); |
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for (auto it = failableList.begin(); it != failableList.end(); ++it) { |
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if (*it > id) { |
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failableList.insert(it, id); |
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return; |
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} else if (*it == id) { |
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// Dependency already contained
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return; |
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} |
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} |
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failableList.push_back(id); |
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} |
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void FailableElements::removeBE(size_t id) { |
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currentlyFailableBE.set(id, false); |
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} |
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void FailableElements::removeDependency(size_t id) { |
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auto iter = std::find(failableConflictingDependencies.begin(), failableConflictingDependencies.end(), id); |
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if (iter != failableConflictingDependencies.end()) { |
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failableConflictingDependencies.erase(iter); |
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return; |
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} |
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iter = std::find(failableNonconflictingDependencies.begin(), failableNonconflictingDependencies.end(), id); |
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if (iter != failableNonconflictingDependencies.end()) { |
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failableNonconflictingDependencies.erase(iter); |
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return; |
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} |
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} |
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void FailableElements::clear() { |
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currentlyFailableBE.clear(); |
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failableConflictingDependencies.clear(); |
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failableNonconflictingDependencies.clear(); |
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} |
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FailableElements::const_iterator FailableElements::begin(bool forceBE) const { |
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bool dependency = hasDependencies() && !forceBE; |
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bool conflicting = failableNonconflictingDependencies.empty(); |
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auto itDep = conflicting ? failableConflictingDependencies.begin() : failableNonconflictingDependencies.begin(); |
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return FailableElements::const_iterator(dependency, conflicting, currentlyFailableBE.begin(), itDep, failableNonconflictingDependencies.end(), failableConflictingDependencies.begin()); |
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} |
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FailableElements::const_iterator FailableElements::end(bool forceBE) const { |
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bool dependency = hasDependencies() && !forceBE; |
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return FailableElements::const_iterator(dependency, true, currentlyFailableBE.end(), failableConflictingDependencies.end(), failableNonconflictingDependencies.end(), failableConflictingDependencies.begin()); |
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} |
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bool FailableElements::hasDependencies() const { |
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return !failableConflictingDependencies.empty() || !failableNonconflictingDependencies.empty(); |
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} |
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bool FailableElements::hasBEs() const { |
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return !currentlyFailableBE.empty(); |
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} |
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std::string FailableElements::getCurrentlyFailableString() const { |
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std::stringstream stream; |
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stream << "{"; |
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if (hasDependencies()) { |
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stream << "Dependencies: "; |
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} |
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for (auto it = begin(); it != end(); ++it) { |
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stream << *it << ", "; |
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} |
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stream << "}"; |
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return stream.str(); |
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} |
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// Explicit instantiations.
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template std::pair<std::shared_ptr<storm::storage::DFTBE<double> const>, std::shared_ptr<storm::storage::DFTDependency<double> const>> FailableElements::const_iterator::getFailBE(storm::storage::DFT<double> const& dft) const; |
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template std::pair<std::shared_ptr<storm::storage::DFTBE<storm::RationalFunction> const>, std::shared_ptr<storm::storage::DFTDependency<storm::RationalFunction> const>> FailableElements::const_iterator::getFailBE(storm::storage::DFT<storm::RationalFunction> const& dft) const; |
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} // namespace storage
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} // namespace dft
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} // namespace storm
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#pragma once |
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#include <list> |
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#include <memory> |
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#include "storm/storage/BitVector.h" |
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namespace storm { |
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namespace storage { |
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// Forward declarations |
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template<typename ValueType> |
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class DFT; |
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template<typename ValueType> |
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class DFTBE; |
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template<typename ValueType> |
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class DFTDependency; |
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} |
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namespace dft { |
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namespace storage { |
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/*! |
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* Handling of currently failable elements (BEs) either due to their own failure or because of dependencies. |
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* |
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* We distinguish between failures of BEs and failures of dependencies. |
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* For dependencies, we further distinguish between non-conflicting and conflicting dependencies. |
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* Non-conflicting dependencies will lead to spurious non-determinsm. |
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* |
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* The class supports iterators for all failable elements (either BE or dependencies). |
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* |
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*/ |
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class FailableElements { |
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public: |
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/*! |
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* Iterator for failable elements. |
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* |
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*/ |
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class const_iterator : public std::iterator<std::input_iterator_tag, size_t> { |
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public: |
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/*! |
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* Construct a new iterator. |
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* We either iterate over all failable BEs or over all dependencies (if dependency is true). |
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* For dependencies, we start with non-conflicting dependencies before iterating over conflicting ones. |
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* For dependencies, we start with non-conflicting dependencies if they are present. |
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* |
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* @param dependency Whether dependencies should be iterated (or BEs if false). |
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* @param conflicting Whether conflicting dependencies should be iterated (or non-conflicting if false). |
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* @param iterBE Iterator for BEs. |
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* @param iterDependency Iterator for Dependencies. |
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* @param nonConflictEnd Iterator to end of non-conflicting dependencies. |
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* @param conflictBegin Iterator to begin of conflicting dependencies. |
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*/ |
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const_iterator(bool dependency, bool conflicting, storm::storage::BitVector::const_iterator const& iterBE, std::list<size_t>::const_iterator const& iterDependency, std::list<size_t>::const_iterator nonConflictEnd, std::list<size_t>::const_iterator conflictBegin); |
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/*! |
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* Constructs an iterator by copying the given iterator. |
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* |
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* @param other The iterator to copy. |
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*/ |
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const_iterator(const_iterator const& other) = default; |
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/*! |
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* Assigns the contents of the given iterator to the current one via copying the former's contents. |
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* |
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* @param other The iterator from which to copy-assign. |
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*/ |
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const_iterator& operator=(const_iterator const& other) = default; |
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/*! |
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* Increment the iterator. |
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* |
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* @return A reference to this iterator. |
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*/ |
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const_iterator& operator++(); |
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/*! |
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* Returns the id of the current failable element. |
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* |
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* @return Element id. |
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*/ |
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uint_fast64_t operator*() const; |
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/*! |
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* Compares the iterator with another iterator for inequality. |
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* |
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* @param other The iterator with respect to which inequality is checked. |
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* @return True if the two iterators are unequal. |
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*/ |
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bool operator!=(const_iterator const& other) const; |
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/*! |
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* Compares the iterator with another iterator for equality. |
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* |
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* @param other The iterator with respect to which equality is checked. |
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* @return True if the two iterators are equal. |
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*/ |
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bool operator==(const_iterator const& other) const; |
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/*! |
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* Return whether the current failure is due to a dependency (or the BE itself). |
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* |
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* @return true iff current failure is due to dependency. |
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*/ |
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bool isFailureDueToDependency() const; |
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/*! |
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* Return whether the current dependency failure is conflicting. |
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* |
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* @return true iff current dependency failure is conflicting. |
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*/ |
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bool isConflictingDependency() const; |
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/*! |
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* Obtain the BE which fails from the current iterator. |
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* Optionally returns the dependency which triggered the BE failure. |
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* |
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* @tparam ValueType Value type. |
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* @param dft DFT. |
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* @return Pair of the BE which fails and the dependency which triggered the failure (or nullptr if the BE fails on its own). |
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*/ |
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template<typename ValueType> |
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std::pair<std::shared_ptr<storm::storage::DFTBE<ValueType> const>, std::shared_ptr<storm::storage::DFTDependency<ValueType> const>> getFailBE(storm::storage::DFT<ValueType> const& dft) const; |
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private: |
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// Whether dependencies are currently considered. |
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bool dependency; |
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// Whether the iterator currently points to a conflicting dependency. |
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bool conflicting; |
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// Iterators for underlying data structures |
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storm::storage::BitVector::const_iterator itBE; |
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std::list<size_t>::const_iterator itDep; |
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// Pointers marking end of non-conflict list and beginning of conflict list |
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// Used for sequential iteration over all dependencies |
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std::list<size_t>::const_iterator nonConflictEnd; |
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std::list<size_t>::const_iterator conflictBegin; |
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}; |
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/*! |
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* Creator. |
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* |
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* @param maxBEId Maximal id of a BE. |
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*/ |
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FailableElements(size_t maxBEId) : currentlyFailableBE(maxBEId) { |
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} |
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/*! |
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* Add failable BE. |
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* Note that this invalidates the iterator. |
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* |
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* @param id Id of BE. |
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*/ |
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void addBE(size_t id); |
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/*! |
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* Add failable dependency. |
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* Note that this invalidates the iterator. |
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* |
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* @param id Id of dependency. |
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* @param isConflicting Whether the dependency is in conflict to other dependencies. In this case |
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* the conflict needs to be resolved non-deterministically. |
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*/ |
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void addDependency(size_t id, bool isConflicting); |
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/*! |
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* Remove BE from list of failable elements. |
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* Note that this invalidates the iterator. |
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* |
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* @param id Id of BE. |
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*/ |
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void removeBE(size_t id); |
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/*! |
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* Remove dependency from list of failable elements. |
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* Note that this invalidates the iterator. |
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* |
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* @param id Id of dependency. |
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*/ |
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void removeDependency(size_t id); |
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/*! |
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* Clear list of currently failable elements. |
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* Note that this invalidates the iterator. |
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*/ |
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void clear(); |
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/*! |
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* Iterator to first failable element. |
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* If dependencies are present, the iterator is for dependencies. Otherwise it is for BEs. |
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* For dependencies, the iterator considers non-conflicting dependencies first. |
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* |
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* @param forceBE If true, failable dependencies are ignored and only BEs are considered. |
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* @return Iterator. |
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*/ |
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FailableElements::const_iterator begin(bool forceBE = false) const; |
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/*! |
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* Iterator after last failable element. |
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* |
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* @param forceBE If true, failable dependencies are ignored and only BEs are considered. |
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* @return Iterator. |
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*/ |
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FailableElements::const_iterator end(bool forceBE = false) const; |
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/*! |
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* Whether failable dependencies are present. |
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* |
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* @return true iff dependencies can fail. |
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*/ |
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bool hasDependencies() const; |
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/*! |
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* Whether failable BEs are present. |
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* |
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* @return true iff BEs can fail. |
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*/ |
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bool hasBEs() const; |
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/*! |
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* Get a string representation of the currently failable elements. |
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* |
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* @return std::string Enumeration of currently failable elements. |
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*/ |
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std::string getCurrentlyFailableString() const; |
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private: |
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// We use a BitVector for BEs but a list for dependencies, because usually only a few dependencies are failable at the same time. |
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// In contrast, usually most BEs are failable. |
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// The lists of failable elements are sorted by increasing id. |
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storm::storage::BitVector currentlyFailableBE; |
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std::list<size_t> failableConflictingDependencies; |
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std::list<size_t> failableNonconflictingDependencies; |
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}; |
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} // namespace storage |
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} // namespace dft |
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} // namespace storm |
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