AuroraRuntime/Include/Aurora/Memory/Heap.hpp

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/***
Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
File: Heap.hpp
Date: 2021-6-9
Author: Reece
***/
#pragma once
namespace Aurora::Memory
{
class Heap
{
public:
virtual Types::size_t GetChunkSize(const void *head) = 0;
template<typename T = void *>
T ZAlloc(Types::size_t length)
{
return reinterpret_cast<T>(_ZAlloc(length));
}
template<typename T = void *>
T ZAlloc(Types::size_t length, Types::size_t align)
{
return reinterpret_cast<T>(_ZAlloc(length, align));
}
template<typename T>
T *ZAlloc()
{
return reinterpret_cast<T *>(_ZAlloc(sizeof(T)));
}
template<typename T>
T *NewArray(Types::size_t count)
{
return ZAlloc<T *>(count * sizeof(T));
}
template<typename T>
T *NewArray(Types::size_t count, Types::size_t align)
{
return ZAlloc<T *>(count * sizeof(T), align);
}
/// Fast, unsafe alloc
template<typename T = void *>
T FAlloc(Types::size_t length)
{
return reinterpret_cast<T>(_FAlloc(length));
}
template<typename T = void *>
T FAlloc(Types::size_t length, Types::size_t align)
{
return reinterpret_cast<T>(_FAlloc(length, align));
}
template<typename T>
T ZRealloc(T in, Types::size_t length)
{
return reinterpret_cast<T>(_ZRealloc(reinterpret_cast<void *>(in), length));
}
template<typename T>
T ZRealloc(T in, Types::size_t length, Types::size_t alloc)
{
return reinterpret_cast<T>(_ZRealloc(reinterpret_cast<void *>(in), length), alloc);
}
template<typename T>
T FRealloc(T in, Types::size_t length)
{
return reinterpret_cast<T>(_FRealloc(reinterpret_cast<void *>(in), length));
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}
template<typename T>
T FRealloc(T in, Types::size_t length, Types::size_t alloc)
{
return reinterpret_cast<T>(_FRealloc(reinterpret_cast<void *>(in), length), alloc);
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}
template<typename T>
void Free(T in)
{
_Free(reinterpret_cast<void *>(in));
}
/**
* @brief
* @param in
* A pointer owned by the heap
* @param pinThis
* If you attempt to destroy a heap, or allow a shared ptr to free the heap w/o freeing all allocations, the heap will dangle and a telemetry warning will be sent.
* pinThis isn't strictly needed unless you wish to slience heap freed before allocation warnings.
* A memory management model whereby you dont pin the parent heap will prevent circular references from taking over; in contrast, the alternative will need well defined object disposal
* One could keep heap references weak outside of your heap manager and always pin this - or you could pin nothing and be careful with object disposal order
* @return
*/
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template<typename T>
AuSPtr<T> ToSmartPointer(T *in, bool pinThis = true)
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{
if (in == nullptr) return {};
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auto heapHandle = pinThis ? GetSelfReference() : AuSPtr<Heap> {};
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return AuSPtr<T>(in,
[heapHandle, in, this](T *delt)
{
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if constexpr (AuIsClass_v<T>)
{
delt->~T();
}
this->Free(delt);
});
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}
template<typename T>
static AuSPtr<T> ToSmartPointer(AuSPtr<Heap> heap, T *in, bool pinHeap = true)
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{
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auto handle = pinHeap ? heap : AuSPtr<Heap> {};
auto ptr = heap.get(); // so long as in is a valid pointer within the heap, this is fine
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return AuSPtr<T>(in,
[handle, ptr](T *delt)
{
ptr->Free(delt);
});
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}
private:
virtual AuSPtr<Heap> GetSelfReference() = 0;
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virtual AU_ALLOC void *_ZAlloc(Types::size_t length) = 0;
virtual AU_ALLOC void *_ZAlloc(Types::size_t length, Types::size_t align) = 0;
virtual AU_ALLOC void *_FAlloc(Types::size_t length) = 0;
virtual AU_ALLOC void *_FAlloc(Types::size_t length, Types::size_t align) = 0;
virtual AU_ALLOC void *_ZRealloc(void *buffer, Types::size_t length, Types::size_t align) = 0;
virtual AU_ALLOC void *_ZRealloc(void *buffer, Types::size_t length) = 0;
virtual AU_ALLOC void *_FRealloc(void *buffer, Types::size_t length, Types::size_t align) = 0;
virtual AU_ALLOC void *_FRealloc(void *buffer, Types::size_t length) = 0;
virtual void _Free(void* buffer) = 0;
};
/**
Returns a heap interface backed by the default allocator
*/
AUKN_SHARED_API(GetDefaultDiscontiguousHeap, Heap);
/**
Allocates Fize amount of memory
NOTE -> Heaps are guaranteed to outlive its' allocations; heap are the one object that own themselves
Destructions are mere suggestions, however, requesting termination before a heap has released all of its memory will result in a telemetry mayday
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@return a heap backed by allocated memory
*/
AUKN_SHARED_API(AllocHeap, Heap, AuUInt size);
}