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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
devcpu.h
CPU device definitions.
***************************************************************************/
#ifndef MAME_EMU_DEVCPU_H
#define MAME_EMU_DEVCPU_H
#pragma once
#include "didisasm.h"
#include "diexec.h"
#include <utility>
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> cpu_device
class cpu_device : public device_t,
public device_execute_interface,
public device_memory_interface,
public device_state_interface,
public device_disasm_interface
{
public:
virtual ~cpu_device();
// configuration helpers
void set_force_no_drc(bool value) { m_force_no_drc = value; }
bool allow_drc() const;
virtual bool cpu_is_interruptible() const;
// To be used only for interruptible cpus
bool access_to_be_redone() noexcept { return std::exchange(m_access_to_be_redone, false); }
bool access_to_be_redone_noclear() noexcept { return m_access_to_be_redone; }
// Returns true if the access must be aborted
bool access_before_time(u64 access_time, u64 current_time) noexcept;
bool access_before_delay(u32 cycles, const void *tag) noexcept;
// The access has already happened, nothing to abort
void access_after_delay(u32 cycles) noexcept;
void defer_access() noexcept;
void retry_access() noexcept;
protected:
// construction/destruction
cpu_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock);
private:
// configured state
bool m_force_no_drc; // whether or not to force DRC off
bool m_access_to_be_redone; // whether an access needs to be redone
const void *m_access_before_delay_tag; // if the tag matches on access_before_delay, consider the delay to have already happened
};
#endif // MAME_EMU_DEVCPU_H
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