Profiling.hpp

#ifndef _PROFILING_HPP
#define _PROFILING_HPP
 
#include <string>
#include <chrono>
#include <vector>
#include <filesystem>
 
namespace Grindstone {
    namespace Profiler {
        struct Result {
            std::string name;
            float start, end;
            uint32_t depth;
            uint32_t threadId;
        };
 
        struct InstrumentationSession {
            std::string name;
            std::filesystem::path path;
            std::vector<Result> results;
        };
 
        class Manager {
        private:
            InstrumentationSession* currentSession = nullptr;
            InstrumentationSession* otherSession = nullptr;
            InstrumentationSession sessionA;
            InstrumentationSession sessionB;
        public:
            Manager();
            void BeginSession(const std::string& name, const std::filesystem::path filepath = "results.json");
            void EndSession();
            void AddProfile(const Result& result);
            static Manager& Get();
            virtual const InstrumentationSession& GetAvailableSession() const;
 
            std::chrono::system_clock::time_point frameStart;
            bool isInSession = false;
            uint32_t depth;
        };
 
        class Timer {
        public:
            Timer(const char* name);
            ~Timer();
            void Stop();
        private:
            const char* name;
            std::chrono::system_clock::time_point startTime;
            bool stopped;
        };
    }
}
 
#ifdef _DEBUG
    #define GRIND_PROFILE_BEGIN_SESSION(name, filepath) Grindstone::Profiler::Manager::Get().BeginSession(name, filepath)
    #define GRIND_PROFILE_END_SESSION() Grindstone::Profiler::Manager::Get().EndSession()
    #define GRIND_PROFILE_SCOPE(name) Grindstone::Profiler::Timer grindstone_profiler_timer_##__LINE__(name)
    #define GRIND_PROFILE_FUNC() GRIND_PROFILE_SCOPE(__FUNCSIG__)
#else
    #define GRIND_PROFILE_BEGIN_SESSION(name, filepath)
    #define GRIND_PROFILE_END_SESSION()
    #define GRIND_PROFILE_SCOPE(name)
    #define GRIND_PROFILE_FUNC()
#endif
 
#endif