/usr/include/hbw_allocator.h is in libmemkind-dev 1.1.0-0ubuntu1.
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* Copyright (C) 2014 - 2016 Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice(s),
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice(s),
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <stddef.h>
#include <new>
#include <hbwmalloc.h>
/*
* Header file for the C++ allocator compatible with the C++ standard library allocator concepts.
* More details in hbwallocator(3) man page.
* Note: memory heap management is based on hbwmalloc, refer to the hbwmalloc man page for more information.
*
* Functionality defined in this header is considered as EXPERIMENTAL API.
* API standards are described in memkind(3) man page.
*/
namespace hbw
{
template <class T>
class allocator
{
public:
/*
* Public member types required and defined by the standard library allocator concepts.
*/
typedef size_t size_type;
typedef ptrdiff_t difference_type;
typedef T* pointer;
typedef const T* const_pointer;
typedef T& reference;
typedef const T& const_reference;
typedef T value_type;
/*
* Public member functions required and defined by the standard library allocator concepts.
*/
allocator() throw() { }
template <class U>
allocator(const allocator<U>&) throw() { }
~allocator() throw() { }
pointer address(reference x) const
{
return &x;
}
const_pointer address(const_reference x) const
{
return &x;
}
/*
* Allocates n*sizeof(T) bytes of high bandwidth memory using hbw_malloc().
* Throws std::bad_alloc when cannot allocate memory.
*/
pointer allocate(size_type n, const void * = 0)
{
if (n > this->max_size()) {
throw std::bad_alloc();
}
pointer result = static_cast<T*>(hbw_malloc(n * sizeof(T)));
if (!result) {
throw std::bad_alloc();
}
return result;
}
/*
* Deallocates memory associated with pointer returned by allocate() using hbw_free().
*/
void deallocate(pointer p, size_type n)
{
hbw_free(static_cast<void*>(p));
}
size_type max_size() const throw()
{
return size_t(-1) / sizeof(T);
}
void construct(pointer p, const value_type& val)
{
::new(p) value_type(val);
}
void destroy(pointer p)
{
p->~T();
}
};
}
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