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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
devfind.h
Device finding template helpers.
***************************************************************************/
#pragma once
#ifndef __EMU_H__
#error Dont include this file directly; include emu.h instead.
#endif
#ifndef __DEVFIND_H__
#define __DEVFIND_H__
#define FINDER_DUMMY_TAG "finder_dummy_tag"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> finder_base
// helper class to request auto-object discovery in the constructor of a derived class
class finder_base
{
friend class device_t;
public:
// construction/destruction
finder_base(device_t &base, const char *tag);
virtual ~finder_base();
// getters
virtual bool findit(bool isvalidation = false) = 0;
// setter for setting the object
void set_tag(const char *tag) { m_tag = tag; }
protected:
// helpers
void *find_memory(UINT8 width, size_t &bytes, bool required);
bool report_missing(bool found, const char *objname, bool required);
// internal state
finder_base *m_next;
device_t &m_base;
const char *m_tag;
};
// ======================> object_finder_base
// helper class to find objects of a particular type
template<class _ObjectClass>
class object_finder_base : public finder_base
{
public:
// construction/destruction
object_finder_base(device_t &base, const char *tag)
: finder_base(base, tag),
m_target(NULL) { }
// operators to make use transparent
operator _ObjectClass *() const { return m_target; }
_ObjectClass *operator->() const { assert(m_target != NULL); return m_target; }
// getter for explicit fetching
_ObjectClass *target() const { return m_target; }
// setter for setting the object
void set_target(_ObjectClass *target) { m_target = target; }
protected:
// internal state
_ObjectClass *m_target;
};
// ======================> device_finder
// device finder template
template<class _DeviceClass, bool _Required>
class device_finder : public object_finder_base<_DeviceClass>
{
public:
// construction/destruction
device_finder(device_t &base, const char *tag)
: object_finder_base<_DeviceClass>(base, tag) { }
// make reference use transparent as well
operator _DeviceClass &() { assert(object_finder_base<_DeviceClass>::m_target != NULL); return *object_finder_base<_DeviceClass>::m_target; }
// finder
virtual bool findit(bool isvalidation = false)
{
device_t *device = this->m_base.subdevice(this->m_tag);
this->m_target = dynamic_cast<_DeviceClass *>(device);
if (device != NULL && this->m_target == NULL)
{
void mame_printf_warning(const char *format, ...) ATTR_PRINTF(1,2);
mame_printf_warning("Device '%s' found but is of incorrect type (actual type is %s)\n", this->m_tag, device->name());
}
return this->report_missing(this->m_target != NULL, "device", _Required);
}
};
// optional device finder
template<class _DeviceClass>
class optional_device : public device_finder<_DeviceClass, false>
{
public:
optional_device(device_t &base, const char *tag = FINDER_DUMMY_TAG) : device_finder<_DeviceClass, false>(base, tag) { }
};
// required devices are similar but throw an error if they are not found
template<class _DeviceClass>
class required_device : public device_finder<_DeviceClass, true>
{
public:
required_device(device_t &base, const char *tag = FINDER_DUMMY_TAG) : device_finder<_DeviceClass, true>(base, tag) { }
};
// ======================> memory_region_finder
// device finder template
template<bool _Required>
class memory_region_finder : public object_finder_base<memory_region>
{
public:
// construction/destruction
memory_region_finder(device_t &base, const char *tag)
: object_finder_base<memory_region>(base, tag) { }
// make reference use transparent as well
operator memory_region &() { assert(object_finder_base<memory_region>::m_target != NULL); return *object_finder_base<memory_region>::m_target; }
// finder
virtual bool findit(bool isvalidation = false)
{
if (isvalidation) return true;
m_target = m_base.memregion(m_tag);
return this->report_missing(m_target != NULL, "memory region", _Required);
}
};
// optional device finder
class optional_memory_region : public memory_region_finder<false>
{
public:
optional_memory_region(device_t &base, const char *tag = FINDER_DUMMY_TAG) : memory_region_finder<false>(base, tag) { }
};
// required devices are similar but throw an error if they are not found
class required_memory_region : public memory_region_finder<true>
{
public:
required_memory_region(device_t &base, const char *tag = FINDER_DUMMY_TAG) : memory_region_finder<true>(base, tag) { }
};
// ======================> memory_bank_finder
// device finder template
template<bool _Required>
class memory_bank_finder : public object_finder_base<memory_bank>
{
public:
// construction/destruction
memory_bank_finder(device_t &base, const char *tag)
: object_finder_base<memory_bank>(base, tag) { }
// make reference use transparent as well
operator memory_bank &() { assert(object_finder_base<memory_bank>::m_target != NULL); return *object_finder_base<memory_bank>::m_target; }
// finder
virtual bool findit(bool isvalidation = false)
{
if (isvalidation) return true;
m_target = m_base.membank(m_tag);
return this->report_missing(m_target != NULL, "memory bank", _Required);
}
};
// optional device finder
class optional_memory_bank : public memory_bank_finder<false>
{
public:
optional_memory_bank(device_t &base, const char *tag = FINDER_DUMMY_TAG) : memory_bank_finder<false>(base, tag) { }
};
// required devices are similar but throw an error if they are not found
class required_memory_bank : public memory_bank_finder<true>
{
public:
required_memory_bank(device_t &base, const char *tag = FINDER_DUMMY_TAG) : memory_bank_finder<true>(base, tag) { }
};
// ======================> ioport_finder
// device finder template
template<bool _Required>
class ioport_finder : public object_finder_base<ioport_port>
{
public:
// construction/destruction
ioport_finder(device_t &base, const char *tag)
: object_finder_base<ioport_port>(base, tag) { }
// make reference use transparent as well
operator ioport_port &() { assert(object_finder_base<ioport_port>::m_target != NULL); return *object_finder_base<ioport_port>::m_target; }
// finder
virtual bool findit(bool isvalidation = false)
{
if (isvalidation) return true;
m_target = m_base.ioport(m_tag);
return this->report_missing(m_target != NULL, "I/O port", _Required);
}
};
// optional device finder
class optional_ioport : public ioport_finder<false>
{
public:
optional_ioport(device_t &base, const char *tag = FINDER_DUMMY_TAG) : ioport_finder<false>(base, tag) { }
};
// required devices are similar but throw an error if they are not found
class required_ioport : public ioport_finder<true>
{
public:
required_ioport(device_t &base, const char *tag = FINDER_DUMMY_TAG) : ioport_finder<true>(base, tag) { }
};
// ======================> shared_ptr_finder
// shared pointer finder template
template<typename _PointerType, bool _Required>
class shared_ptr_finder : public object_finder_base<_PointerType>
{
public:
// construction/destruction
shared_ptr_finder(device_t &base, const char *tag, UINT8 width = sizeof(_PointerType) * 8)
: object_finder_base<_PointerType>(base, tag),
m_bytes(0),
m_width(width) { }
// operators to make use transparent
_PointerType operator[](int index) const { return this->m_target[index]; }
_PointerType &operator[](int index) { return this->m_target[index]; }
// getter for explicit fetching
UINT32 bytes() const { return m_bytes; }
UINT32 mask() const { return m_bytes - 1; }
// setter for setting the object
void set_target(_PointerType *target, size_t bytes) { this->m_target = target; m_bytes = bytes; }
// dynamic allocation of a shared pointer
void allocate(UINT32 entries)
{
assert(m_allocated.count() == 0);
m_allocated.resize(entries);
this->m_target = m_allocated;
m_bytes = entries * sizeof(_PointerType);
this->m_base.save_item(this->m_allocated, this->m_tag);
}
// finder
virtual bool findit(bool isvalidation = false)
{
if (isvalidation) return true;
this->m_target = reinterpret_cast<_PointerType *>(this->find_memory(m_width, m_bytes, _Required));
return this->report_missing(this->m_target != NULL, "shared pointer", _Required);
}
protected:
// internal state
size_t m_bytes;
UINT8 m_width;
dynamic_array<_PointerType> m_allocated;
};
// optional shared pointer finder
template<class _PointerType>
class optional_shared_ptr : public shared_ptr_finder<_PointerType, false>
{
public:
optional_shared_ptr(device_t &base, const char *tag = FINDER_DUMMY_TAG, UINT8 width = sizeof(_PointerType) * 8) : shared_ptr_finder<_PointerType, false>(base, tag, width) { }
};
// required shared pointer finder
template<class _PointerType>
class required_shared_ptr : public shared_ptr_finder<_PointerType, true>
{
public:
required_shared_ptr(device_t &base, const char *tag = FINDER_DUMMY_TAG, UINT8 width = sizeof(_PointerType) * 8) : shared_ptr_finder<_PointerType, true>(base, tag, width) { }
};
// ======================> shared_ptr_array_finder
// shared pointer array finder template
template<typename _PointerType, int _Count, bool _Required>
class shared_ptr_array_finder
{
typedef shared_ptr_finder<_PointerType, _Required> shared_ptr_type;
public:
// construction/destruction
shared_ptr_array_finder(device_t &base, const char *basetag, UINT8 width = sizeof(_PointerType) * 8)
{
for (int index = 0; index < _Count; index++)
m_array[index].reset(global_alloc(shared_ptr_type(base, m_tag[index].format("%s.%d", basetag, index), width)));
}
// array accessors
const shared_ptr_type &operator[](int index) const { assert(index < _Count); return *m_array[index]; }
shared_ptr_type &operator[](int index) { assert(index < _Count); return *m_array[index]; }
protected:
// internal state
auto_pointer<shared_ptr_type> m_array[_Count+1];
astring m_tag[_Count+1];
};
// optional shared pointer array finder
template<class _PointerType, int _Count>
class optional_shared_ptr_array : public shared_ptr_array_finder<_PointerType, _Count, false>
{
public:
optional_shared_ptr_array(device_t &base, const char *tag = FINDER_DUMMY_TAG, UINT8 width = sizeof(_PointerType) * 8) : shared_ptr_array_finder<_PointerType, _Count, false>(base, tag, width) { }
};
// required shared pointer array finder
template<class _PointerType, int _Count>
class required_shared_ptr_array : public shared_ptr_array_finder<_PointerType, _Count, true>
{
public:
required_shared_ptr_array(device_t &base, const char *tag = FINDER_DUMMY_TAG, UINT8 width = sizeof(_PointerType) * 8) : shared_ptr_array_finder<_PointerType, _Count, true>(base, tag, width) { }
};
#endif /* __DEVFIND_H__ */
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