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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <optional>
#include <boost/icl/interval_set.hpp>
#include <boost/serialization/export.hpp>
#include "common/common_types.h"
#include "common/serialization/boost_interval_set.hpp"
namespace Kernel {
struct AddressMapping;
class VMManager;
struct MemoryRegionInfo {
u32 base; // Not an address, but offset from start of FCRAM
u32 size;
u32 used;
// The domain of the interval_set are offsets from start of FCRAM
using IntervalSet = boost::icl::interval_set<u32>;
using Interval = IntervalSet::interval_type;
IntervalSet free_blocks;
// When locked, Free calls will be ignored, while Allocate calls will hit an assert. A memory
// region locks itself after deserialization.
bool is_locked{};
/**
* Reset the allocator state
* @param base The base offset the beginning of FCRAM.
* @param size The region size this allocator manages
*/
void Reset(u32 base, u32 size);
/**
* Allocates memory from the heap.
* @param size The size of memory to allocate.
* @returns The set of blocks that make up the allocation request. Empty set if there is no
* enough space.
*/
IntervalSet HeapAllocate(u32 size);
/**
* Allocates memory from the linear heap with specific address and size.
* @param offset the address offset to the beginning of FCRAM.
* @param size size of the memory to allocate.
* @returns true if the allocation is successful. false if the requested region is not free.
*/
bool LinearAllocate(u32 offset, u32 size);
/**
* Allocates memory from the linear heap with only size specified.
* @param size size of the memory to allocate.
* @returns the address offset to the beginning of FCRAM; null if there is no enough space
*/
std::optional<u32> LinearAllocate(u32 size);
/**
* Allocates memory from the linear heap with only size specified.
* @param size size of the memory to allocate.
* @returns the address offset to the found block, searching from the end of FCRAM; null if
* there is no enough space
*/
std::optional<u32> RLinearAllocate(u32 size);
/**
* Frees one segment of memory. The memory must have been allocated as heap or linear heap.
* @param offset the region address offset to the beginning of FCRAM.
* @param size the size of the region to free.
*/
void Free(u32 offset, u32 size);
/**
* Unlock the MemoryRegion. Used after loading is completed.
*/
void Unlock();
private:
friend class boost::serialization::access;
template <class Archive>
void serialize(Archive& ar, const unsigned int);
};
} // namespace Kernel
BOOST_CLASS_EXPORT_KEY(Kernel::MemoryRegionInfo)
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