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This commit is contained in:
Alexey Milovidov 2020-05-26 01:06:02 +03:00
parent 4bb3381bc9
commit 55a02c391d
2 changed files with 6 additions and 5 deletions
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3
src/Common/PODArray.cpp
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@ -2,7 +2,8 @@
namespace DB
{
/// Used for left padding of PODArray when empty
const char EmptyPODArray[EmptyPODArraySize]{};
const char empty_pod_array[empty_pod_array_size]{};
}

8
src/Common/PODArray.h
View File

@ -63,8 +63,8 @@ namespace ErrorCodes
* TODO Pass alignment to Allocator.
* TODO Allow greater alignment than alignof(T). Example: array of char aligned to page size.
*/
static constexpr size_t EmptyPODArraySize = 1024;
extern const char EmptyPODArray[EmptyPODArraySize];
static constexpr size_t empty_pod_array_size = 1024;
extern const char empty_pod_array[empty_pod_array_size];
/** Base class that depend only on size of element, not on element itself.
* You can static_cast to this class if you want to insert some data regardless to the actual type T.
@ -81,9 +81,9 @@ protected:
/// pad_left is also rounded up to 16 bytes to maintain alignment of allocated memory.
static constexpr size_t pad_left = integerRoundUp(integerRoundUp(pad_left_, ELEMENT_SIZE), 16);
/// Empty array will point to this static memory as padding.
static constexpr char * null = pad_left ? const_cast<char *>(EmptyPODArray) + EmptyPODArraySize : nullptr;
static constexpr char * null = pad_left ? const_cast<char *>(empty_pod_array) + empty_pod_array_size : nullptr;
static_assert(pad_left <= EmptyPODArraySize && "Left Padding exceeds EmptyPODArraySize. Is the element size too large?");
static_assert(pad_left <= empty_pod_array_size && "Left Padding exceeds empty_pod_array_size. Is the element size too large?");
char * c_start = null; /// Does not include pad_left.
char * c_end = null;