mirror of
https://github.com/triqs/dft_tools
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173 lines
7.0 KiB
C++
173 lines
7.0 KiB
C++
/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011-2013 by M. Ferrero, O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#ifndef TRIQS_TOOLS_MC_MEASURE2_H
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#define TRIQS_TOOLS_MC_MEASURE2_H
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#include <functional>
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#include <boost/mpi.hpp>
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#include <map>
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#include <triqs/utility/exceptions.hpp>
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#include "./impl_tools.hpp"
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namespace triqs { namespace mc_tools {
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// mini concept checking
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template<typename MCSignType, typename T, typename Enable=void> struct has_accumulate : std::false_type {};
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template<typename MCSignType, typename T> struct has_accumulate <MCSignType, T, decltype(std::declval<T>().accumulate(MCSignType()))> : std::true_type {};
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template<typename T, typename Enable=void> struct has_collect_result : std::false_type {};
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template<typename T> struct has_collect_result < T, decltype(std::declval<T>().collect_results(std::declval<boost::mpi::communicator>()))> : std::true_type {};
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//--------------------------------------------------------------------
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template<typename MCSignType>
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class measure {
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std::shared_ptr<void> impl_;
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std::function<measure()> clone_;
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size_t hash_;
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std::string type_name_;
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std::function<void (MCSignType const & ) > accumulate_;
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std::function<void (boost::mpi::communicator const & )> collect_results_;
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std::function<void(h5::group, std::string const &)> h5_r, h5_w;
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uint64_t count_;
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template<typename MeasureType>
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void construct_delegation (MeasureType * p) {
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impl_= std::shared_ptr<MeasureType> (p);
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clone_ = [p]() { return MeasureType(*p);} ;
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hash_ = typeid(MeasureType).hash_code();
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type_name_ = typeid(MeasureType).name();
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accumulate_ = [p](MCSignType const & x) { p->accumulate(x);};
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count_ = 0;
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collect_results_ = [p] ( boost::mpi::communicator const & c) { p->collect_results(c);};
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h5_r = make_h5_read(p);
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h5_w = make_h5_write(p);
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}
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public :
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template<typename MeasureType>
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measure (MeasureType && p) {
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static_assert( is_move_constructible<MeasureType>::value, "This measure is not MoveConstructible");
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static_assert( has_accumulate<MCSignType,MeasureType>::value, " This measure has no accumulate method !");
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static_assert( has_collect_result<MeasureType>::value, " This measure has no collect_results method !");
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construct_delegation( new typename std::remove_reference<MeasureType>::type(std::forward<MeasureType>(p)));
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}
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// Value semantics. Everyone at the end call move = ...
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measure(measure const &rhs) {*this = rhs;}
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measure(measure &rhs) {*this = rhs;} // or it will use the template = bug
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measure(measure && rhs) { *this = std::move(rhs);}
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measure & operator = (measure const & rhs) { *this = rhs.clone_(); return *this;}
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measure & operator = (measure && rhs) =default;
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void accumulate(MCSignType signe){ assert(impl_); count_++; accumulate_(signe); }
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void collect_results (boost::mpi::communicator const & c ) { collect_results_(c);}
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uint64_t count() const { return count_;}
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template<typename MeasureType> bool has_type() const { return (typeid(MeasureType).hash_code() == hash_); };
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template<typename MeasureType> void check_type() const {
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if (!(has_type<MeasureType>()))
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TRIQS_RUNTIME_ERROR << "Trying to retrieve a measure of type "<< typeid(MeasureType).name() << " from a measure of type "<< type_name_;
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};
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template<typename MeasureType> MeasureType & get() { check_type<MeasureType>(); return *(static_cast<MeasureType *>(impl_.get())); }
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template<typename MeasureType> MeasureType const & get() const { check_type<MeasureType>(); return *(static_cast<MeasureType const *>(impl_.get())); }
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friend void h5_write (h5::group g, std::string const & name, measure const & m){ if (m.h5_w) m.h5_w(g,name);};
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friend void h5_read (h5::group g, std::string const & name, measure & m) { if (m.h5_r) m.h5_r(g,name);};
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};
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//--------------------------------------------------------------------
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template<typename MCSignType>
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class measure_set {
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typedef measure<MCSignType> measure_type;
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std::map<std::string, measure<MCSignType>> m_map;
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public :
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measure_set(){}
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measure_set(measure_set const &) = default;
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measure_set(measure_set &&) = default;
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measure_set& operator = (measure_set const &) = default;
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measure_set& operator = (measure_set &&) = default;
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/**
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* Register the Measure M with a name
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*/
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template<typename MeasureType>
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void insert (MeasureType && M, std::string const & name) {
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if (has(name)) TRIQS_RUNTIME_ERROR <<"measure_set : insert : measure '"<<name<<"' already inserted";
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m_map.insert(std::make_pair(name, measure_type (std::forward<MeasureType>(M))));
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// not implemented on gcc 4.6's stdlibc++ ?
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// m_map.emplace(name, measure_type (std::forward<MeasureType>(M)));
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}
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bool has(std::string const & name) const { return m_map.find(name) != m_map.end(); }
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void accumulate(MCSignType const & signe) { for (auto & nmp : m_map) nmp.second.accumulate(signe); }
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std::vector<std::string> names() const {
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std::vector<std::string> res;
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for (auto & nmp : m_map) res.push_back(nmp.first);
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return res;
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}
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// gather result for all measure, on communicator c
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void collect_results (boost::mpi::communicator const & c ) { for (auto & nmp : m_map) nmp.second.collect_results(c); }
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// HDF5 interface
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friend void h5_write (h5::group g, std::string const & name, measure_set const & ms){
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auto gr = g.create_group(name);
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for (auto & p : ms.m_map) h5_write(gr,p.first, p.second);
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}
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friend void h5_read (h5::group g, std::string const & name, measure_set & ms){
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auto gr = g.open_group(name);
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for (auto & p : ms.m_map) h5_read(gr,p.first, p.second);
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}
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// access to the measure, given its type, with dynamical type check
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template<typename MeasureType>
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MeasureType & get_measure(std::string const & name) {
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auto it = m_map.find (name);
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if (it == m_map.end()) TRIQS_RUNTIME_ERROR << " Measure " << name << " unknown";
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return it->template get<MeasureType>();
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}
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template<typename MeasureType>
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MeasureType const & get_measure(std::string const & name) const {
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auto it = m_map.find (name);
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if (it == m_map.end()) TRIQS_RUNTIME_ERROR << " Measure " << name << " unknown";
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return it->template get<MeasureType>();
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}
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};
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}}// end namespace
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#endif
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