ClickHouse/dbms/src/Common/AlignedBuffer.h
2019-04-06 01:35:56 +03:00

37 lines
777 B
C++

#pragma once
#include <cstdlib>
#include <utility>
#include <boost/noncopyable.hpp>
namespace DB
{
/** Aligned piece of memory.
* It can only be allocated and destroyed.
* MemoryTracker is not used. AlignedBuffer is intended for small pieces of memory.
*/
class AlignedBuffer : private boost::noncopyable
{
private:
void * buf = nullptr;
void alloc(size_t size, size_t alignment);
void dealloc();
public:
AlignedBuffer() {}
AlignedBuffer(size_t size, size_t alignment);
AlignedBuffer(AlignedBuffer && old) { std::swap(buf, old.buf); }
~AlignedBuffer();
void reset(size_t size, size_t alignment);
char * data() { return static_cast<char *>(buf); }
const char * data() const { return static_cast<const char *>(buf); }
};
}