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// Copyright 2019 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include <vector>
#include "core/hle/kernel/object.h"
union ResultCode;
namespace Kernel {
class KernelCore;
class Process;
enum class MemoryPermission : u32;
/// Defines the interface for transfer memory objects.
///
/// Transfer memory is typically used for the purpose of
/// transferring memory between separate process instances,
/// thus the name.
///
class TransferMemory final : public Object {
public:
static constexpr HandleType HANDLE_TYPE = HandleType::TransferMemory;
static SharedPtr<TransferMemory> Create(KernelCore& kernel, VAddr base_address, u64 size,
MemoryPermission permissions);
TransferMemory(const TransferMemory&) = delete;
TransferMemory& operator=(const TransferMemory&) = delete;
TransferMemory(TransferMemory&&) = delete;
TransferMemory& operator=(TransferMemory&&) = delete;
std::string GetTypeName() const override {
return "TransferMemory";
}
std::string GetName() const override {
return GetTypeName();
}
HandleType GetHandleType() const override {
return HANDLE_TYPE;
}
/// Gets a pointer to the backing block of this instance.
const u8* GetPointer() const;
/// Gets the size of the memory backing this instance in bytes.
u64 GetSize() const;
/// Attempts to map transfer memory with the given range and memory permissions.
///
/// @param address The base address to being mapping memory at.
/// @param size The size of the memory to map, in bytes.
/// @param permissions The memory permissions to check against when mapping memory.
///
/// @pre The given address, size, and memory permissions must all match
/// the same values that were given when creating the transfer memory
/// instance.
///
ResultCode MapMemory(VAddr address, u64 size, MemoryPermission permissions);
/// Unmaps the transfer memory with the given range
///
/// @param address The base address to begin unmapping memory at.
/// @param size The size of the memory to unmap, in bytes.
///
/// @pre The given address and size must be the same as the ones used
/// to create the transfer memory instance.
///
ResultCode UnmapMemory(VAddr address, u64 size);
private:
explicit TransferMemory(KernelCore& kernel);
~TransferMemory() override;
/// Memory block backing this instance.
std::shared_ptr<std::vector<u8>> backing_block;
/// The base address for the memory managed by this instance.
VAddr base_address = 0;
/// Size of the memory, in bytes, that this instance manages.
u64 memory_size = 0;
/// The memory permissions that are applied to this instance.
MemoryPermission owner_permissions{};
/// The process that this transfer memory instance was created under.
Process* owner_process = nullptr;
/// Whether or not this transfer memory instance has mapped memory.
bool is_mapped = false;
};
} // namespace Kernel
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