EmuTimer.hh

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#ifndef EMUTIMER_HH
#define EMUTIMER_HH
 
#include "Schedulable.hh"
#include "DynamicClock.hh"
#include "openmsx.hh"
#include <memory>
 
namespace openmsx {
 
class EmuTimerCallback
{
public:
        virtual void callback(byte value) = 0;
 
protected:
        ~EmuTimerCallback() = default;
};
 
 
class EmuTimer final : public Schedulable
{
public:
        EmuTimer(Scheduler& scheduler, EmuTimerCallback& cb,
                 byte flag, unsigned freq_num, unsigned freq_denom,
                 int maxVal);
 
        [[nodiscard]] static std::unique_ptr<EmuTimer> createOPM_1(
                Scheduler& scheduler, EmuTimerCallback& cb);
        [[nodiscard]] static std::unique_ptr<EmuTimer> createOPM_2(
                Scheduler& scheduler, EmuTimerCallback& cb);
        [[nodiscard]] static std::unique_ptr<EmuTimer> createOPP_2(
                Scheduler& scheduler, EmuTimerCallback& cb);
        [[nodiscard]] static std::unique_ptr<EmuTimer> createOPL3_1(
                Scheduler& scheduler, EmuTimerCallback& cb);
        [[nodiscard]] static std::unique_ptr<EmuTimer> createOPL3_2(
                Scheduler& scheduler, EmuTimerCallback& cb);
        [[nodiscard]] static std::unique_ptr<EmuTimer> createOPL4_1(
                Scheduler& scheduler, EmuTimerCallback& cb);
        [[nodiscard]] static std::unique_ptr<EmuTimer> createOPL4_2(
                Scheduler& scheduler, EmuTimerCallback& cb);
 
        void setValue(int value);
        void setStart(bool start, EmuTime::param time);
 
        template<typename Archive>
        void serialize(Archive& ar, unsigned version);
 
private:
        void executeUntil(EmuTime::param time) override;
        void schedule(EmuTime::param time);
        void unschedule();
 
private:
        EmuTimerCallback& cb;
        DynamicClock clock{EmuTime::zero()};
        const int maxVal;
        int count;
        const byte flag;
        bool counting = false;
};
 
} // namespace openmsx
 
#endif