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-rw-r--r--src/emu/emumem_het.h50
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diff --git a/src/emu/emumem_het.h b/src/emu/emumem_het.h
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+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert
+
+// handler_entry_read_tap/handler_entry_write_tap
+
+// handler which tap on a bus access and possibly change the data value through a std::function
+
+template<int Width, int AddrShift, int Endian> class handler_entry_read_tap : public handler_entry_read_passthrough<Width, AddrShift, Endian>
+{
+public:
+ using uX = typename handler_entry_size<Width>::uX;
+ using inh = handler_entry_read_passthrough<Width, AddrShift, Endian>;
+
+ handler_entry_read_tap(address_space *space, memory_passthrough_handler &mph, std::string name, std::function<void (offs_t offset, uX &data, uX mem_mask)> tap) : handler_entry_read_passthrough<Width, AddrShift, Endian>(space, mph), m_name(name), m_tap(std::move(tap)) {}
+ ~handler_entry_read_tap() = default;
+
+ uX read(offs_t offset, uX mem_mask) override;
+
+ std::string name() const override;
+
+ handler_entry_read_tap<Width, AddrShift, Endian> *instantiate(handler_entry_read<Width, AddrShift, Endian> *next) const override;
+
+protected:
+ std::string m_name;
+ std::function<void (offs_t offset, uX &data, uX mem_mask)> m_tap;
+
+ handler_entry_read_tap(address_space *space, memory_passthrough_handler &mph, handler_entry_read<Width, AddrShift, Endian> *next, std::string name, std::function<void (offs_t offset, uX &data, uX mem_mask)> tap) : handler_entry_read_passthrough<Width, AddrShift, Endian>(space, mph, next), m_name(name), m_tap(tap) {}
+};
+
+template<int Width, int AddrShift, int Endian> class handler_entry_write_tap : public handler_entry_write_passthrough<Width, AddrShift, Endian>
+{
+public:
+ using uX = typename handler_entry_size<Width>::uX;
+ using inh = handler_entry_write_passthrough<Width, AddrShift, Endian>;
+
+ handler_entry_write_tap(address_space *space, memory_passthrough_handler &mph, std::string name, std::function<void (offs_t offset, uX &data, uX mem_mask)> tap) : handler_entry_write_passthrough<Width, AddrShift, Endian>(space, mph), m_name(name), m_tap(std::move(tap)) {}
+ ~handler_entry_write_tap() = default;
+
+ void write(offs_t offset, uX data, uX mem_mask) override;
+
+ std::string name() const override;
+
+ handler_entry_write_tap<Width, AddrShift, Endian> *instantiate(handler_entry_write<Width, AddrShift, Endian> *next) const override;
+
+protected:
+ std::string m_name;
+ std::function<void (offs_t offset, uX &data, uX mem_mask)> m_tap;
+
+ handler_entry_write_tap(address_space *space, memory_passthrough_handler &mph, handler_entry_write<Width, AddrShift, Endian> *next, std::string name, std::function<void (offs_t offset, uX &data, uX mem_mask)> tap) : handler_entry_write_passthrough<Width, AddrShift, Endian>(space, mph, next), m_name(name), m_tap(tap) {}
+};