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68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
//---------------------------------------------------------------------------
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//
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// SCSI Target Emulator PiSCSI
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// for Raspberry Pi
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//
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// Copyright (C) 2022-2023 Uwe Seimet
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//
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//---------------------------------------------------------------------------
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#pragma once
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#include "shared/scsi.h"
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#include "shared/piscsi_exceptions.h"
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#include <unordered_map>
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#include <functional>
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using namespace scsi_defs;
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class PhaseHandler
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{
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phase_t phase = phase_t::busfree;
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public:
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PhaseHandler() = default;
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virtual ~PhaseHandler() = default;
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void Init();
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virtual void BusFree() = 0;
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virtual void Selection() = 0;
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virtual void Command() = 0;
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virtual void Status() = 0;
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virtual void DataIn() = 0;
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virtual void DataOut() = 0;
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virtual void MsgIn() = 0;
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virtual void MsgOut() = 0;
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virtual bool Process(int) = 0;
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protected:
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phase_t GetPhase() const { return phase; }
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void SetPhase(phase_t p) { phase = p; }
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bool IsSelection() const { return phase == phase_t::selection; }
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bool IsBusFree() const { return phase == phase_t::busfree; }
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bool IsCommand() const { return phase == phase_t::command; }
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bool IsStatus() const { return phase == phase_t::status; }
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bool IsDataIn() const { return phase == phase_t::datain; }
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bool IsDataOut() const { return phase == phase_t::dataout; }
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bool IsMsgIn() const { return phase == phase_t::msgin; }
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bool IsMsgOut() const { return phase == phase_t::msgout; }
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void ProcessPhase() const
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{
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try {
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phase_executors.at(phase)();
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}
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catch(const out_of_range&) {
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throw scsi_exception(sense_key::aborted_command);
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}
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}
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private:
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unordered_map<phase_t, function<void()>> phase_executors;
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};
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