48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// Copyright 2016 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <optional>
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#include "common/common_types.h"
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namespace Common {
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/**
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* Memory hooks have two purposes:
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* 1. To allow reads and writes to a region of memory to be intercepted. This is used to implement
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* texture forwarding and memory breakpoints for debugging.
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* 2. To allow for the implementation of MMIO devices.
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*
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* A hook may be mapped to multiple regions of memory.
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*
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* If a std::nullopt or false is returned from a function, the read/write request is passed through
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* to the underlying memory region.
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*/
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class MemoryHook {
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public:
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virtual ~MemoryHook();
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virtual std::optional<bool> IsValidAddress(VAddr addr) = 0;
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virtual std::optional<u8> Read8(VAddr addr) = 0;
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virtual std::optional<u16> Read16(VAddr addr) = 0;
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virtual std::optional<u32> Read32(VAddr addr) = 0;
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virtual std::optional<u64> Read64(VAddr addr) = 0;
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virtual bool ReadBlock(VAddr src_addr, void* dest_buffer, std::size_t size) = 0;
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virtual bool Write8(VAddr addr, u8 data) = 0;
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virtual bool Write16(VAddr addr, u16 data) = 0;
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virtual bool Write32(VAddr addr, u32 data) = 0;
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virtual bool Write64(VAddr addr, u64 data) = 0;
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virtual bool WriteBlock(VAddr dest_addr, const void* src_buffer, std::size_t size) = 0;
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};
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using MemoryHookPointer = std::shared_ptr<MemoryHook>;
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} // namespace Common
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