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36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
/**
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* This file contains some using-declarations that define various kinds of
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* PODArray.
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*/
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#pragma once
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#include <Common/Allocator_fwd.h>
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namespace DB
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{
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inline constexpr size_t integerRoundUp(size_t value, size_t dividend)
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{
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return ((value + dividend - 1) / dividend) * dividend;
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}
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template <typename T, size_t initial_bytes = 4096,
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typename TAllocator = Allocator<false>, size_t pad_right_ = 0,
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size_t pad_left_ = 0>
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class PODArray;
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/** For columns. Padding is enough to read and write xmm-register at the address of the last element. */
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template <typename T, size_t initial_bytes = 4096, typename TAllocator = Allocator<false>>
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using PaddedPODArray = PODArray<T, initial_bytes, TAllocator, 15, 16>;
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/** A helper for declaring PODArray that uses inline memory.
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* The initial size is set to use all the inline bytes, since using less would
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* only add some extra allocation calls.
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*/
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template <typename T, size_t inline_bytes,
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size_t rounded_bytes = integerRoundUp(inline_bytes, sizeof(T))>
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using PODArrayWithStackMemory = PODArray<T, rounded_bytes,
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AllocatorWithStackMemory<Allocator<false>, rounded_bytes, alignof(T)>>;
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}
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