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ircd::buffer: Abstract the aligned_alloc() out of the unique_buffer template.

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This commit is contained in:
Jason Volk 2018-11-01 23:27:51 -07:00
parent 916a5b26ea
commit 10cf8e798c
1 changed files with 22 additions and 1 deletions
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23
include/ircd/buffer/unique_buffer.h
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@ -11,6 +11,11 @@
#pragma once
#define HAVE_IRCD_BUFFER_UNIQUE_BUFFER_H
namespace ircd::buffer
{
std::unique_ptr<char, decltype(&std::free)> aligned_alloc(const size_t &align, const size_t &size);
}
/// Like unique_ptr, this template holds ownership of an allocated buffer
///
template<class buffer,
@ -116,6 +121,19 @@ template<class buffer,
char *
ircd::buffer::unique_buffer<buffer, alignment>::allocate(const size_t &size)
{
return aligned_alloc(alignment, size).release();
}
inline std::unique_ptr<char, decltype(&std::free)>
ircd::buffer::aligned_alloc(const size_t &align,
const size_t &size)
{
static const size_t &align_default{16};
const size_t &alignment
{
align?: align_default
};
int errc;
void *ret;
if(unlikely((errc = ::posix_memalign(&ret, alignment, size)) != 0))
@ -126,5 +144,8 @@ ircd::buffer::unique_buffer<buffer, alignment>::allocate(const size_t &size)
assert(errc == 0);
assert(ret != nullptr);
return reinterpret_cast<char *>(ret);
return std::unique_ptr<char, decltype(&std::free)>
{
reinterpret_cast<char *>(ret), std::free
};
}