RASCSI/cpp/hal/systimer.h

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//---------------------------------------------------------------------------
//
// SCSI Target Emulator PiSCSI
// for Raspberry Pi
//
// Powered by XM6 TypeG Technology.
// Copyright (C) 2016-2020 GIMONS
// Copyright (C) 2022 akuker
//
// [ High resolution timer ]
//
//---------------------------------------------------------------------------
#pragma once
#include <memory>
#include <stdint.h>
#include "shared/scsi.h"
class PlatformSpecificTimer
{
public:
// Default constructor
PlatformSpecificTimer() = default;
// Default destructor
virtual ~PlatformSpecificTimer() = default;
// Initialization
virtual void Init() = 0;
// Get system timer low byte
virtual uint32_t GetTimerLow() = 0;
// Sleep for N nanoseconds
virtual void SleepNsec(uint32_t nsec) = 0;
// Sleep for N microseconds
virtual void SleepUsec(uint32_t usec) = 0;
};
//===========================================================================
//
// System timer
//
//===========================================================================
class SysTimer
{
public:
static void Init();
// Get system timer low byte
static uint32_t GetTimerLow();
// Sleep for N nanoseconds
static void SleepNsec(uint32_t nsec);
// Sleep for N microseconds
static void SleepUsec(uint32_t usec);
private:
static bool initialized;
static bool is_raspberry;
static std::unique_ptr<PlatformSpecificTimer> systimer_ptr;
};