mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-18 05:32:52 +00:00
36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
|
/**
|
||
|
|
* This file contains some using-declarations that define various kinds of
|
||
|
|
* PODArray.
|
||
|
|
*/
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <Common/Allocator_fwd.h>
|
||
|
|
|
||
|
|
namespace DB
|
||
|
|
{
|
||
|
|
|
||
|
|
inline constexpr size_t integerRoundUp(size_t value, size_t dividend)
|
||
|
|
{
|
||
|
|
return ((value + dividend - 1) / dividend) * dividend;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, size_t initial_bytes = 4096,
|
||
|
|
typename TAllocator = Allocator<false>, size_t pad_right_ = 0,
|
||
|
|
size_t pad_left_ = 0>
|
||
|
|
class PODArray;
|
||
|
|
|
||
|
|
/** For columns. Padding is enough to read and write xmm-register at the address of the last element. */
|
||
|
|
template <typename T, size_t initial_bytes = 4096, typename TAllocator = Allocator<false>>
|
||
|
|
using PaddedPODArray = PODArray<T, initial_bytes, TAllocator, 15, 16>;
|
||
|
|
|
||
|
|
/** A helper for declaring PODArray that uses inline memory.
|
||
|
|
* The initial size is set to use all the inline bytes, since using less would
|
||
|
|
* only add some extra allocation calls.
|
||
|
|
*/
|
||
|
|
template <typename T, size_t inline_bytes,
|
||
|
|
size_t rounded_bytes = integerRoundUp(inline_bytes, sizeof(T))>
|
||
|
|
using PODArrayWithStackMemory = PODArray<T, rounded_bytes,
|
||
|
|
AllocatorWithStackMemory<Allocator<false>, rounded_bytes, alignof(T)>>;
|
||
|
|
|
||
|
|
}
|