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// SPDX-License-Identifier: BSD-2-Clause
/* Copyright (C) 2019 - 2021 Intel Corporation. */
#pragma once
#include <cmath>
#include <cstddef>
#include <exception>
#include <map>
#include <memory>
#include <stdexcept>
#include <string>
#include <type_traits>
#include "memkind.h"
/*
* Header file for the C++ allocator compatible with the C++ standard library
* allocator concepts. More details in memkind(3) man page. Note: memory heap
* management is based on memkind_malloc, refer to the memkind(3) man page for
* more information.
*
* Functionality defined in this header is considered as stable API (STANDARD
* API). API standards are described in memkind(3) man page.
*/
namespace libmemkind
{
enum class kinds
{
DEFAULT = 0,
HUGETLB = 1,
INTERLEAVE = 2,
HBW = 3,
HBW_ALL = 4,
HBW_HUGETLB = 5,
HBW_ALL_HUGETLB = 6,
HBW_PREFERRED = 7,
HBW_PREFERRED_HUGETLB = 8,
HBW_INTERLEAVE = 9,
REGULAR = 10,
DAX_KMEM = 11,
DAX_KMEM_ALL = 12,
DAX_KMEM_PREFERRED = 13,
DAX_KMEM_INTERLEAVE = 14,
HIGHEST_CAPACITY = 15,
HIGHEST_CAPACITY_PREFERRED = 16,
HIGHEST_CAPACITY_LOCAL = 17,
HIGHEST_CAPACITY_LOCAL_PREFERRED = 18,
LOWEST_LATENCY_LOCAL = 19,
LOWEST_LATENCY_LOCAL_PREFERRED = 20,
HIGHEST_BANDWIDTH_LOCAL = 21,
HIGHEST_BANDWIDTH_LOCAL_PREFERRED = 22
};
namespace static_kind
{
template <typename T>
class allocator
{
public:
using value_type = T;
using pointer = value_type *;
using const_pointer = const value_type *;
using reference = value_type &;
using const_reference = const value_type &;
using size_type = size_t;
using difference_type = ptrdiff_t;
template <class U>
struct rebind {
using other = allocator<U>;
};
template <typename U>
friend class allocator;
#if !_GLIBCXX_USE_CXX11_ABI
/* This is a workaround for compilers (e.g GCC 4.8) that uses C++11
* standard, but use old - non C++11 ABI */
template <typename V = void>
explicit allocator()
{
static_assert(
std::is_same<V, void>::value,
"libmemkind::static_kind::allocator cannot be compiled without CXX11 ABI");
}
#endif
explicit allocator(libmemkind::kinds kind)
{
switch (kind) {
case libmemkind::kinds::DEFAULT:
_kind = MEMKIND_DEFAULT;
break;
case libmemkind::kinds::HUGETLB:
_kind = MEMKIND_HUGETLB;
break;
case libmemkind::kinds::INTERLEAVE:
_kind = MEMKIND_INTERLEAVE;
break;
case libmemkind::kinds::HBW:
_kind = MEMKIND_HBW;
break;
case libmemkind::kinds::HBW_ALL:
_kind = MEMKIND_HBW_ALL;
break;
case libmemkind::kinds::HBW_HUGETLB:
_kind = MEMKIND_HBW_HUGETLB;
break;
case libmemkind::kinds::HBW_ALL_HUGETLB:
_kind = MEMKIND_HBW_ALL_HUGETLB;
break;
case libmemkind::kinds::HBW_PREFERRED:
_kind = MEMKIND_HBW_PREFERRED;
break;
case libmemkind::kinds::HBW_PREFERRED_HUGETLB:
_kind = MEMKIND_HBW_PREFERRED_HUGETLB;
break;
case libmemkind::kinds::HBW_INTERLEAVE:
_kind = MEMKIND_HBW_INTERLEAVE;
break;
case libmemkind::kinds::REGULAR:
_kind = MEMKIND_REGULAR;
break;
case libmemkind::kinds::DAX_KMEM:
_kind = MEMKIND_DAX_KMEM;
break;
case libmemkind::kinds::DAX_KMEM_ALL:
_kind = MEMKIND_DAX_KMEM_ALL;
break;
case libmemkind::kinds::DAX_KMEM_PREFERRED:
_kind = MEMKIND_DAX_KMEM_PREFERRED;
break;
case libmemkind::kinds::DAX_KMEM_INTERLEAVE:
_kind = MEMKIND_DAX_KMEM_INTERLEAVE;
break;
case libmemkind::kinds::HIGHEST_CAPACITY:
_kind = MEMKIND_HIGHEST_CAPACITY;
break;
case libmemkind::kinds::HIGHEST_CAPACITY_PREFERRED:
_kind = MEMKIND_HIGHEST_CAPACITY_PREFERRED;
break;
case libmemkind::kinds::HIGHEST_CAPACITY_LOCAL:
_kind = MEMKIND_HIGHEST_CAPACITY_LOCAL;
break;
case libmemkind::kinds::HIGHEST_CAPACITY_LOCAL_PREFERRED:
_kind = MEMKIND_HIGHEST_CAPACITY_LOCAL_PREFERRED;
break;
case libmemkind::kinds::LOWEST_LATENCY_LOCAL:
_kind = MEMKIND_LOWEST_LATENCY_LOCAL;
break;
case libmemkind::kinds::LOWEST_LATENCY_LOCAL_PREFERRED:
_kind = MEMKIND_LOWEST_LATENCY_LOCAL_PREFERRED;
break;
case libmemkind::kinds::HIGHEST_BANDWIDTH_LOCAL:
_kind = MEMKIND_HIGHEST_BANDWIDTH_LOCAL;
break;
case libmemkind::kinds::HIGHEST_BANDWIDTH_LOCAL_PREFERRED:
_kind = MEMKIND_HIGHEST_BANDWIDTH_LOCAL_PREFERRED;
break;
default:
throw std::runtime_error("Unknown libmemkind::kinds");
break;
}
}
allocator(const allocator &other) = default;
template <typename U>
allocator(const allocator<U> &other) noexcept
{
_kind = other._kind;
}
allocator(allocator &&other) = default;
template <typename U>
allocator(const allocator<U> &&other) noexcept
{
_kind = std::move(other._kind);
}
allocator<T> &operator=(const allocator &other) = default;
template <typename U>
allocator<T> &operator=(const allocator<U> &other) noexcept
{
_kind = other._kind;
return *this;
}
allocator<T> &operator=(allocator &&other) = default;
template <typename U>
allocator<T> &operator=(allocator<U> &&other) noexcept
{
_kind = std::move(other._kind);
return *this;
}
pointer allocate(size_type n) const
{
pointer result =
static_cast<pointer>(memkind_malloc(_kind, n * sizeof(T)));
if (!result) {
throw std::bad_alloc();
}
return result;
}
void deallocate(pointer p, size_type n) const
{
memkind_free(_kind, static_cast<void *>(p));
}
template <class U, class... Args>
void construct(U *p, Args &&...args) const
{
::new ((void *)p) U(std::forward<Args>(args)...);
}
void destroy(pointer p) const
{
p->~value_type();
}
template <typename U, typename V>
friend bool operator==(const allocator<U> &lhs, const allocator<V> &rhs);
template <typename U, typename V>
friend bool operator!=(const allocator<U> &lhs, const allocator<V> &rhs);
private:
memkind_t _kind;
};
template <typename U, typename V>
bool operator==(const allocator<U> &lhs, const allocator<V> &rhs)
{
return lhs._kind == rhs._kind;
}
template <typename U, typename V>
bool operator!=(const allocator<U> &lhs, const allocator<V> &rhs)
{
return !(lhs._kind == rhs._kind);
}
} // namespace static_kind
} // namespace libmemkind
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