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#pragma once
 
#include <util/generic/ptr.h>
#include <functional>
 
class IThreadFactory {
public: 
    class IThreadAble { 
    public: 
        inline IThreadAble() noexcept = default;
 
        virtual ~IThreadAble() = default;
 
        inline void Execute() { 
            DoExecute(); 
        } 
 
    private: 
        virtual void DoExecute() = 0; 
    }; 
 
    class IThread { 
        friend class IThreadFactory;
 
    public: 
        inline IThread() noexcept = default;
 
        virtual ~IThread() = default;
 
        inline void Join() noexcept {
            DoJoin(); 
        } 
 
    private: 
        inline void Run(IThreadAble* func) { 
            DoRun(func); 
        } 
 
    private: 
        // it's actually DoStart 
        virtual void DoRun(IThreadAble* func) = 0; 
        virtual void DoJoin() noexcept = 0;
    }; 
 
    inline IThreadFactory() noexcept = default;
 
    virtual ~IThreadFactory() = default;
 
    // XXX: rename to Start 
    inline THolder<IThread> Run(IThreadAble* func) {
        THolder<IThread> ret(DoCreate());

        ret->Run(func); 
 
        return ret; 
    } 
 
    THolder<IThread> Run(std::function<void()> func);
 
private: 
    virtual IThread* DoCreate() = 0; 
}; 
 
IThreadFactory* SystemThreadFactory();
void SetSystemThreadFactory(IThreadFactory* pool);