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#include <Common/AlignedBuffer.h>
#include <Common/Exception.h>
#include <Common/formatReadable.h>
namespace DB
{
namespace ErrorCodes
{
extern const int CANNOT_ALLOCATE_MEMORY;
}
void AlignedBuffer::alloc(size_t size, size_t alignment)
{
void * new_buf;
int res = ::posix_memalign(&new_buf, std::max(alignment, sizeof(void*)), size);
if (0 != res)
throwFromErrno(fmt::format("Cannot allocate memory (posix_memalign), size: {}, alignment: {}.",
ReadableSize(size), ReadableSize(alignment)),
ErrorCodes::CANNOT_ALLOCATE_MEMORY, res);
buf = new_buf;
}
void AlignedBuffer::dealloc()
{
if (buf)
::free(buf);
}
void AlignedBuffer::reset(size_t size, size_t alignment)
{
dealloc();
alloc(size, alignment);
}
AlignedBuffer::AlignedBuffer(size_t size, size_t alignment)
{
alloc(size, alignment);
}
AlignedBuffer::~AlignedBuffer()
{
dealloc();
}
}
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