NXKit/Submodules/UIKit/include/DispatchQueue.h

#pragma once

#include <Timer.h>
#include <queue>
#include <string>
#include <functional>
#include <thread>
#include <mutex>

#ifdef main
#undef main
#endif

namespace NXKit {

struct DispatchQueueTask {
    std::function<void()> func;
    Timer delay;
};

class DispatchQueue {
public:
    explicit DispatchQueue(const std::string& tag);
    ~DispatchQueue();

    static std::shared_ptr<DispatchQueue> main();
    static std::shared_ptr<DispatchQueue> global();

    [[nodiscard]] std::string tag() const { return _tag; }
    void async(const std::function<void()>& task);
    void asyncAfter(double seconds, const std::function<void()>& task);

    [[nodiscard]] bool isActive() const { return _task_loop_active; }
private:
    static std::shared_ptr<DispatchQueue> _main;
    static std::shared_ptr<DispatchQueue> _global;
    std::queue<DispatchQueueTask> _queue;
    std::string _tag;

    pthread_t _task_loop_thread = nullptr;
    std::mutex _m_async_mutex;
    volatile bool _task_loop_active = true;
    static void* task_loop(void* a);

    void performAll();

    friend bool applicationRunLoop();
};

}