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/* ========================================
Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
======================================== */
#ifndef __KERNEL_KIT_TIMER_H__
#define __KERNEL_KIT_TIMER_H__
#include <ArchKit/ArchKit.h>
#include <KernelKit/KPC.h>
namespace Kernel {
class SoftwareTimer;
class ITimer;
inline constexpr Int16 kTimeUnit = 1000;
class ITimer {
public:
/// @brief Default constructor
explicit ITimer() = default;
virtual ~ITimer() = default;
public:
NE_COPY_DEFAULT(ITimer)
public:
virtual BOOL Wait();
};
class SoftwareTimer final : public ITimer {
public:
explicit SoftwareTimer(Int64 seconds);
~SoftwareTimer() override;
public:
NE_COPY_DEFAULT(SoftwareTimer)
public:
BOOL Wait() override;
private:
UIntPtr* fDigitalTimer{nullptr};
Int64 fWaitFor{0};
};
class HardwareTimer final : public ITimer {
public:
explicit HardwareTimer(UInt64 seconds);
~HardwareTimer() override;
public:
NE_COPY_DEFAULT(HardwareTimer)
public:
BOOL Wait() override;
private:
volatile UInt8* fDigitalTimer{nullptr};
Int64 fWaitFor{0};
};
inline UInt64 rtl_microseconds(UInt64 time) {
if (time < 1) return 0;
// TODO: nanoseconds maybe?
return time / kTimeUnit;
}
inline UInt64 rtl_milliseconds(UInt64 time) {
if (time < 1) return 0;
return time;
}
} // namespace Kernel
#endif // !__KERNEL_KIT_TIMER_H__
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