source: src/Common/Stats/Counter.h @ 5c216b4

//
// Cforall Version 1.0.0 Copyright (C) 2019 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// Counter.h --
//
// Author           : Thierry Delisle
// Created On       : Thu Feb 28 12::05:10 2019
// Last Modified By :
// Last Modified On :
// Update Count     :
//

#pragma once

#include <cstdint>
#include <iostream>

#include "Common/Stats/Base.h"

#if defined( NO_STATISTICS )
        #define NO_COUNTER_STATISTICS
#endif

namespace Stats {
        namespace Counters {
#               if defined(NO_COUNTERS_STATISTICS)

                        static inline void print() {}

                        class CounterGroup {
                        public:
                        };

                        class SimpleCounter {
                        public:
                                inline void operator++() {}
                                inline void operator++(int) {}
                                inline void operator+=(size_t) {}
                        };

                        template<typename T>
                        class AverageCounter {
                        public:
                                inline void push(T value) {}
                        };

                        template<typename T>
                        class MaxCounter {
                        public:
                                inline void push(T value) {}
                        };

                        template<typename counter_t>
                        counter_t * build(const char * const name) {
                                return nullptr;
                        }

                        template<typename counter_t>
                        counter_t * build(const char * const name, Base::Tree<top> * parent) {
                                        return nullptr;
                        }
#               else
                        extern bool enabled;

                        extern Base::TreeTop top;

                        class CounterGroup : public Base::Tree<top> {
                        public:
                                CounterGroup(const char * const name ) : Base::Tree<top>(name) {}
                                CounterGroup(const char * const name, Base::Tree<top> * parent) : Base::Tree<top>(name, parent) {}

                                virtual void print(std::ostream & os) override { os << ""; }
                        protected:
                                virtual ~CounterGroup() = default;
                        };

                        class SimpleCounter : public Base::Tree<top> {
                        public:
                                SimpleCounter(const char * const name ) : Base::Tree<top>(name) {}
                                SimpleCounter(const char * const name, Base::Tree<top> * parent) : Base::Tree<top>(name, parent) {}

                                virtual void print(std::ostream & os) override { os << count; }

                                inline void operator++()             { if(!enabled) return; count++;        }
                                inline void operator++(int)          { if(!enabled) return; count++;        }
                                inline void operator+=(size_t value) { if(!enabled) return; count += value; }

                        protected:
                                virtual ~SimpleCounter() = default;

                        private:
                                size_t count = 0;
                        };

                        template<typename T>
                        class AverageCounter : public Base::Tree<top> {
                        public:
                                AverageCounter(const char * const name ) : Base::Tree<top>(name), sum{} {}
                                AverageCounter(const char * const name, Base::Tree<top> * parent) : Base::Tree<top>(name, parent), sum{} {}

                                virtual void print(std::ostream & os) { os << sum / count; }

                                inline void push(T value) { if(!enabled) return; sum += value; count++; }

                        protected:
                                virtual ~AverageCounter() = default;

                        private:
                                T sum;
                                size_t count = 1;
                        };

                        template<typename T>
                        class MaxCounter : public Base::Tree<top> {
                        public:
                                MaxCounter(const char * const name ) : Base::Tree<top>(name), max{} {}
                                MaxCounter(const char * const name, Base::Tree<top> * parent) : Base::Tree<top>(name, parent), max{} {}

                                virtual void print(std::ostream & os) { os << max; }

                                inline void push(T value) { if(!enabled) return; max = std::max(max, value); }

                        protected:
                                virtual ~MaxCounter() = default;

                        private:
                                T max;
                        };

                        template<typename counter_t>
                        counter_t * build(const char * const name) {
                                if(!enabled) return nullptr;
                                return new counter_t(name);
                        }

                        template<typename counter_t>
                        counter_t * build(const char * const name, Base::Tree<top> * parent) {
                                if(!enabled) return nullptr;
                                return new counter_t(name, parent);
                        }
#               endif
        }
}