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refactor(memory): summing allocator support into one header file

This commit is contained in:
_Redstone_c_ 2023-02-13 18:51:53 +08:00
parent 4ab63da977
commit 151c90d371
4 changed files with 66 additions and 93 deletions
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3
Redcraft.Utility/Source/Public/Containers/Array.h
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@ -1,6 +1,7 @@
#pragma once
#include "CoreTypes.h"
#include "Memory/Allocator.h"
#include "Templates/Utility.h"
#include "Templates/TypeHash.h"
#include "Templates/Container.h"
@ -9,8 +10,6 @@
#include "Miscellaneous/Compare.h"
#include "Memory/MemoryOperator.h"
#include "Memory/ObserverPointer.h"
#include "Memory/DefaultAllocator.h"
#include "Memory/AllocatorInterface.h"
#include "Miscellaneous/AssertionMacros.h"
NAMESPACE_REDCRAFT_BEGIN

65
Redcraft.Utility/Source/Public/Memory/AllocatorInterface.h → Redcraft.Utility/Source/Public/Memory/Allocator.h
View File

@ -53,6 +53,71 @@ struct FAllocatorInterface
};
};
/** This is heap allocator that calls Memory::Malloc() directly for memory allocation. */
struct FHeapAllocator : public FAllocatorInterface
{
template <CObject T>
struct ForElementType : public FAllocatorInterface::ForElementType<T>
{
NODISCARD FORCEINLINE T* Allocate(size_t InNum)
{
return InNum != 0 ? static_cast<T*>(Memory::Malloc(Memory::QuantizeSize(InNum * sizeof(T)), alignof(T))) : nullptr;
}
FORCEINLINE void Deallocate(T* InPtr)
{
Memory::Free(InPtr);
}
NODISCARD FORCEINLINE constexpr size_t CalculateSlackGrow(size_t Num, size_t NumAllocated) const
{
const size_t FirstGrow = 4;
const size_t ConstantGrow = 16;
size_t Result;
check(Num > NumAllocated);
Result = (NumAllocated != 0) ? (Num + 3 * Num / 8 + ConstantGrow) : (Num > FirstGrow ? Num : FirstGrow);
Result = Memory::QuantizeSize(Result * sizeof(T), alignof(T)) / sizeof(T);
return Result;
}
NODISCARD FORCEINLINE constexpr size_t CalculateSlackShrink(size_t Num, size_t NumAllocated) const
{
size_t Result;
check(Num < NumAllocated);
const bool bTooManySlackBytes = (NumAllocated - Num) * sizeof(T) >= 16 * 1024;
const bool bTooManySlackElements = 3 * Num < 2 * NumAllocated;
const bool bNeedToShrink = (bTooManySlackBytes || bTooManySlackElements) && (NumAllocated - Num > 64 || Num == 0);
if (bNeedToShrink)
{
Result = Num != 0 ? Memory::QuantizeSize(Num * sizeof(T), alignof(T)) / sizeof(T) : 0;
}
else
{
Result = NumAllocated;
}
return Result;
}
NODISCARD FORCEINLINE constexpr size_t CalculateSlackReserve(size_t Num) const
{
return Num != 0 ? Memory::QuantizeSize(Num * sizeof(T), alignof(T)) / sizeof(T) : 0;
}
};
};
using FDefaultAllocator = FHeapAllocator;
NAMESPACE_MODULE_END(Utility)
NAMESPACE_MODULE_END(Redcraft)
NAMESPACE_REDCRAFT_END

15
Redcraft.Utility/Source/Public/Memory/DefaultAllocator.h
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@ -1,15 +0,0 @@
#pragma once
#include "CoreTypes.h"
#include "Memory/Memory.h"
#include "Memory/HeapAllocator.h"
NAMESPACE_REDCRAFT_BEGIN
NAMESPACE_MODULE_BEGIN(Redcraft)
NAMESPACE_MODULE_BEGIN(Utility)
using FDefaultAllocator = FHeapAllocator;
NAMESPACE_MODULE_END(Utility)
NAMESPACE_MODULE_END(Redcraft)
NAMESPACE_REDCRAFT_END

76
Redcraft.Utility/Source/Public/Memory/HeapAllocator.h
View File

@ -1,76 +0,0 @@
#pragma once
#include "CoreTypes.h"
#include "Memory/Memory.h"
#include "Memory/AllocatorInterface.h"
NAMESPACE_REDCRAFT_BEGIN
NAMESPACE_MODULE_BEGIN(Redcraft)
NAMESPACE_MODULE_BEGIN(Utility)
/** This is heap allocator that calls Memory::Malloc() directly for memory allocation. */
struct FHeapAllocator : public FAllocatorInterface
{
template <CObject T>
struct ForElementType : public FAllocatorInterface::ForElementType<T>
{
NODISCARD FORCEINLINE T* Allocate(size_t InNum)
{
return InNum != 0 ? static_cast<T*>(Memory::Malloc(Memory::QuantizeSize(InNum * sizeof(T)), alignof(T))) : nullptr;
}
FORCEINLINE void Deallocate(T* InPtr)
{
Memory::Free(InPtr);
}
NODISCARD FORCEINLINE constexpr size_t CalculateSlackGrow(size_t Num, size_t NumAllocated) const
{
const size_t FirstGrow = 4;
const size_t ConstantGrow = 16;
size_t Result;
check(Num > NumAllocated);
Result = (NumAllocated != 0) ? (Num + 3 * Num / 8 + ConstantGrow) : (Num > FirstGrow ? Num : FirstGrow);
Result = Memory::QuantizeSize(Result * sizeof(T), alignof(T)) / sizeof(T);
return Result;
}
NODISCARD FORCEINLINE constexpr size_t CalculateSlackShrink(size_t Num, size_t NumAllocated) const
{
size_t Result;
check(Num < NumAllocated);
const bool bTooManySlackBytes = (NumAllocated - Num) * sizeof(T) >= 16 * 1024;
const bool bTooManySlackElements = 3 * Num < 2 * NumAllocated;
const bool bNeedToShrink = (bTooManySlackBytes || bTooManySlackElements) && (NumAllocated - Num > 64 || Num == 0);
if (bNeedToShrink)
{
Result = Num != 0 ? Memory::QuantizeSize(Num * sizeof(T), alignof(T)) / sizeof(T) : 0;
}
else
{
Result = NumAllocated;
}
return Result;
}
NODISCARD FORCEINLINE constexpr size_t CalculateSlackReserve(size_t Num) const
{
return Num != 0 ? Memory::QuantizeSize(Num * sizeof(T), alignof(T)) / sizeof(T) : 0;
}
};
};
NAMESPACE_MODULE_END(Utility)
NAMESPACE_MODULE_END(Redcraft)
NAMESPACE_REDCRAFT_END