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allocator cleanup

v1
Brett 2024-02-19 14:47:09 -05:00
parent 83fff1652d
commit 1fdf6f6e89
2 changed files with 107 additions and 96 deletions
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201
include/blt/std/allocator.h
View File

@ -274,99 +274,106 @@ namespace blt
std::vector<block_storage*> blocks;
};
template<typename T>
class bump_allocator : public allocator_base<T, T*, const T*>
{
public:
using value = T;
using type = T;
using value_type = type;
using pointer = type*;
using const_pointer = const type*;
using void_pointer = void*;
using const_void_pointer = const void*;
using reference = value_type&;
using const_reference = const value_type&;
using size_type = size_t;
using difference_type = size_t;
using propagate_on_container_move_assignment = std::false_type;
template<class U>
struct rebind
{
typedef blt::bump_allocator<U> other;
};
using allocator_base<value_type, pointer, const_pointer>::allocator_base;
private:
pointer buffer_;
blt::size_t offset_;
blt::size_t size_;
public:
explicit bump_allocator(blt::size_t size): buffer_(static_cast<pointer>(malloc(size * sizeof(T)))), offset_(0), size_(size)
{}
// template<typename T>
// class bump_allocator : public allocator_base<T, T*, const T*>
// {
// public:
// using value = T;
// using type = T;
// using value_type = type;
// using pointer = type*;
// using const_pointer = const type*;
// using void_pointer = void*;
// using const_void_pointer = const void*;
// using reference = value_type&;
// using const_reference = const value_type&;
// using size_type = size_t;
// using difference_type = size_t;
// using propagate_on_container_move_assignment = std::false_type;
// template<class U>
// struct rebind
// {
// typedef blt::bump_allocator<U> other;
// };
// using allocator_base<value_type, pointer, const_pointer>::allocator_base;
// private:
// pointer buffer_;
// blt::size_t offset_;
// blt::size_t size_;
// public:
// explicit bump_allocator(blt::size_t size): buffer_(static_cast<pointer>(malloc(size * sizeof(T)))), offset_(0), size_(size)
// {}
//
// template<typename... Args>
// explicit bump_allocator(blt::size_t size, Args&& ... defaults):
// buffer_(static_cast<pointer>(malloc(size * sizeof(type)))), offset_(0), size_(size)
// {
// for (blt::size_t i = 0; i < size_; i++)
// ::new(&buffer_[i]) T(std::forward<Args>(defaults)...);
// }
//
// bump_allocator(pointer buffer, blt::size_t size): buffer_(buffer), offset_(0), size_(size)
// {}
//
// bump_allocator(const bump_allocator& copy) = delete;
//
// bump_allocator(bump_allocator&& move) noexcept
// {
// buffer_ = move.buffer_;
// size_ = move.size_;
// offset_ = move.offset_;
// }
//
// bump_allocator& operator=(const bump_allocator& copy) = delete;
//
// bump_allocator& operator=(bump_allocator&& move) noexcept
// {
// std::swap(move.buffer_, buffer_);
// std::swap(move.size_, size_);
// std::swap(move.offset_, offset_);
// }
//
// pointer allocate(blt::size_t n)
// {
// auto nv = offset_ + n;
// if (nv > size_)
// throw std::bad_alloc();
// pointer b = &buffer_[offset_];
// offset_ = nv;
// return b;
// }
//
// void deallocate(pointer, blt::size_t)
// {}
//
// ~bump_allocator()
// {
// free(buffer_);
// }
// };
template<typename... Args>
explicit bump_allocator(blt::size_t size, Args&& ... defaults):
buffer_(static_cast<pointer>(malloc(size * sizeof(type)))), offset_(0), size_(size)
{
for (blt::size_t i = 0; i < size_; i++)
::new(&buffer_[i]) T(std::forward<Args>(defaults)...);
}
/**
* The bump allocator is meant to be a faster area allocator which will only allocate forward through either a supplied buffer or size
* or will create a linked list type data structure of buffered blocks.
* @tparam ALLOC allocator to use for any allocations. In the case of the non-linked variant, this will be used if a size is supplied. The supplied buffer must be allocated with this allocator!
* @tparam linked use a linked list to allocate with the allocator or just use the supplied buffer and throw an exception of we cannot allocate
*/
template<typename ALLOC = std::allocator<blt::u8>, bool linked = true>
class bump_allocator;
bump_allocator(pointer buffer, blt::size_t size): buffer_(buffer), offset_(0), size_(size)
{}
bump_allocator(const bump_allocator& copy) = delete;
bump_allocator(bump_allocator&& move) noexcept
{
buffer_ = move.buffer_;
size_ = move.size_;
offset_ = move.offset_;
}
bump_allocator& operator=(const bump_allocator& copy) = delete;
bump_allocator& operator=(bump_allocator&& move) noexcept
{
std::swap(move.buffer_, buffer_);
std::swap(move.size_, size_);
std::swap(move.offset_, offset_);
}
pointer allocate(blt::size_t n)
{
auto nv = offset_ + n;
if (nv > size_)
throw std::bad_alloc();
pointer b = &buffer_[offset_];
offset_ = nv;
return b;
}
void deallocate(pointer, blt::size_t)
{}
~bump_allocator()
{
free(buffer_);
}
};
template<bool linked = true>
class multi_type_area_allocator;
template<>
class multi_type_area_allocator<false>
template<typename ALLOC>
class bump_allocator<ALLOC, false>
{
private:
ALLOC allocator;
blt::u8* buffer_;
blt::u8* offset_;
blt::size_t size_;
public:
explicit multi_type_area_allocator(blt::size_t size): buffer_(static_cast<blt::u8*>(malloc(size))), offset_(buffer_), size_(size)
explicit bump_allocator(blt::size_t size): buffer_(static_cast<blt::u8*>(allocator.allocate(size))), offset_(buffer_), size_(size)
{}
explicit multi_type_area_allocator(blt::u8* buffer, blt::size_t size): buffer_(buffer), offset_(buffer), size_(size)
explicit bump_allocator(blt::u8* buffer, blt::size_t size): buffer_(buffer), offset_(buffer), size_(size)
{}
template<typename T>
@ -401,30 +408,31 @@ namespace blt
p->~U();
}
~multi_type_area_allocator()
~bump_allocator()
{
free(buffer_);
allocator.deallocate(buffer_, size_);
}
};
template<>
class multi_type_area_allocator<true>
template<typename ALLOC>
class bump_allocator<ALLOC, true>
{
private:
struct block
{
blt::u8* buffer;
blt::size_t offset;
blt::u8* buffer = nullptr;
blt::size_t offset = 0;
blt::size_t allocated_objects = 0;
blt::size_t deallocated_objects = 0;
};
std::vector<block> blocks;
ALLOC allocator;
std::vector<block, typename ALLOC::template rebind<block>> blocks;
blt::size_t size_;
void expand()
{
BLT_INFO("I have expanded!");
blocks.push_back({static_cast<blt::u8*>(malloc(size_)), 0});
blocks.push_back({static_cast<blt::u8*>(allocator.allocate(size_)), 0});
}
template<typename T>
@ -445,7 +453,10 @@ namespace blt
}
public:
explicit multi_type_area_allocator(blt::size_t size): size_(size)
/**
* @param size of the list blocks
*/
explicit bump_allocator(blt::size_t size): size_(size)
{
expand();
}
@ -486,7 +497,7 @@ namespace blt
if (remove_index < 0)
return;
std::iter_swap(blocks.begin() + remove_index, blocks.end() - 1);
free(blocks.back().buffer);
allocator.deallocate(blocks.back().buffer, size_);
BLT_DEBUG("I have freed a block!");
blocks.pop_back();
}
@ -511,10 +522,10 @@ namespace blt
p->~U();
}
~multi_type_area_allocator()
~bump_allocator()
{
for (auto& v : blocks)
free(v.buffer);
allocator.deallocate(v.buffer, size_);
}
};
}

2
include/blt/std/simd.h
View File

@ -34,7 +34,7 @@ namespace blt
class simd
{
public:
using type = TYPE;
private:
#if defined(__AVX__) || defined(__AVX2__)
__m256d data;