////  Created by Ryan Huffman on 2016-12-14//  Copyright 2013-2016 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #pragma once#ifndef hifi_Trace_h#define hifi_Trace_h #include <cstdint>#include <mutex> #include <QtCore/QString>#include <QtCore/QVariantMap>#include <QtCore/QHash>#include <QtCore/QSet>#include <QtCore/QLoggingCategory> #include "DependencyManager.h" namespace tracing { bool enabled(); using TraceTimestamp = uint64_t; enum EventType : char {    DurationBegin = 'B',    DurationEnd = 'E',     Complete = 'X',    Instant = 'i',    Counter = 'C',     AsyncNestableStart = 'b',    AsyncNestableInstant = 'n',    AsyncNestableEnd = 'e',     FlowStart = 's',    FlowStep = 't',    FlowEnd = 'f',     Sample = 'P',     ObjectCreated = 'N',    ObjectSnapshot = 'O',    ObjectDestroyed = 'D',     Metadata = 'M',     MemoryDumpGlobal = 'V',    MemoryDumpProcess = 'v',     Mark = 'R',     ClockSync = 'c',     ContextEnter = '(',    ContextLeave = ')'}; struct TraceEvent {    QString id;    QString name;    EventType type;    qint64 timestamp;    qint64 processID;    qint64 threadID;    const QLoggingCategory& category;    QVariantMap args;    QVariantMap extra;     void writeJson(QTextStream& out) const;}; class Tracer : public Dependency {public:    static int64_t now();    void traceEvent(const QLoggingCategory& category,         const QString& name, EventType type,        const QString& id = "",         const QVariantMap& args = QVariantMap(), const QVariantMap& extra = QVariantMap());     void traceEvent(const QLoggingCategory& category,         const QString& name, EventType type,        int64_t timestamp,        const QString& id = "",         const QVariantMap& args = QVariantMap(), const QVariantMap& extra = QVariantMap());     void startTracing();    void stopTracing();    void serialize(const QString& file);    bool isEnabled() const { return _enabled; } private:    void traceEvent(const QLoggingCategory& category,         const QString& name, EventType type,        qint64 timestamp, qint64 processID, qint64 threadID,        const QString& id = "",        const QVariantMap& args = QVariantMap(), const QVariantMap& extra = QVariantMap());     bool _enabled { false };    std::list<TraceEvent> _events;    std::list<TraceEvent> _metadataEvents;    std::mutex _eventsMutex;}; inline void traceEvent(const QLoggingCategory& category, int64_t timestamp, const QString& name, EventType type, const QString& id = "", const QVariantMap& args = {}, const QVariantMap& extra = {}) {    if (!DependencyManager::isSet<Tracer>()) {        return;    }    const auto& tracer = DependencyManager::get<Tracer>();    if (tracer) {        tracer->traceEvent(category, name, type, timestamp, id, args, extra);    }} inline void traceEvent(const QLoggingCategory& category, const QString& name, EventType type, const QString& id = "", const QVariantMap& args = {}, const QVariantMap& extra = {}) {    if (!DependencyManager::isSet<Tracer>()) {        return;    }    const auto& tracer = DependencyManager::get<Tracer>();    if (tracer) {        tracer->traceEvent(category, name, type, id, args, extra);    }} inline void traceEvent(const QLoggingCategory& category, const QString& name, EventType type, int id, const QVariantMap& args = {}, const QVariantMap& extra = {}) {    traceEvent(category, name, type, QString::number(id), args, extra);} } #endif // hifi_Trace_h