metrics.h

// Copyright (c) 2016 The Zcash developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "uint256.h"

#include <atomic>
#include <mutex>
#include <string>

struct AtomicCounter {
    std::atomic<uint64_t> value;

    AtomicCounter() : value {0} { }

    void increment(){
        ++value;
    }

    void decrement(){
        --value;
    }

    int get() const {
        return value.load();
    }
};

class AtomicTimer {
private:
    std::mutex mtx;
    uint64_t threads;
    int64_t start_time;
    int64_t total_time;

public:
    AtomicTimer() : threads(0), start_time(0), total_time(0) {}

    /**
     * Starts timing on first call, and counts the number of calls.
     */
    void start();

    /**
     * Counts number of calls, and stops timing after it has been called as
     * many times as start().
     */
    void stop();

    bool running();

    uint64_t threadCount();

    double rate(const AtomicCounter& count);
};

extern AtomicCounter transactionsValidated;
extern AtomicCounter ehSolverRuns;
extern AtomicCounter solutionTargetChecks;
extern AtomicTimer miningTimer;

void TrackMinedBlock(uint256 hash);

void MarkStartTime();
double GetLocalSolPS();
int EstimateNetHeightInner(int height, int64_t tipmediantime,
                           int heightLastCheckpoint, int64_t timeLastCheckpoint,
                           int64_t genesisTime, int64_t targetSpacing);

void TriggerRefresh();

void ConnectMetricsScreen();
void ThreadShowMetricsScreen();

/**
 * Heart image: https://commons.wikimedia.org/wiki/File:Heart_coraz%C3%B3n.svg
 * License: CC BY-SA 3.0
 *
 * Rendering options:
 * Zcash: img2txt -W 40 -H 20 -f utf8 -d none -g 0.7 Z-yellow.orange-logo.png
 * Heart: img2txt -W 40 -H 20 -f utf8 -d none 2000px-Heart_corazón.svg.png
 */
const std::string METRICS_ART =
"                                                                                \n"
"                                                                                \n"
"             :88SX@888@@X8:                    8;     %X        X%     ;8       \n"
"          %%Xt%tt%SSSSS:XXXt@@              X            ::  ::            X    \n"
"        @S;;tt%%%t    ;;::XXXXSX           %               SS               %   \n"
"      .t:::;;%8888    88888tXXXX8;        S                                  S  \n"
"     .%...:::8             8::XXX%;       X                                  X  \n"
"     8888...:t888888X     8t;;::XX8       8                                  8  \n"
"    %888888...:::;:8    :Xttt;;;::X@                                            \n"
"    888888888...:St    8:%%tttt;;;:X       X                                X   \n"
"    88888888888S8    :%;ttt%%tttt;;X        8                              8    \n"
"    %888888888%t    8S:;;;tt%%%ttt;8          :                          :      \n"
"     8t8888888     S8888888Stt%%%t@            ::                      ::       \n"
"     .@tt888@              8;;ttt@;               t                  t          \n"
"      .8ttt8@SSSSS    SXXXX%:;;;X;                  8              8            \n"
"        X8ttt8888%    %88...::X8                      X.        .X              \n"
"          %8@tt88;8888%8888%8X                          :;    ;:                \n"
"             :@888@XXX@888:                                tt                   \n"
"                                                                                \n"
"                                                                                ";