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// SPDX-License-Identifier: BSD-2-Clause
/* Copyright (C) 2014 - 2021 Intel Corporation. */
///////////////////////////////////////////////////////////////////////////////////////////////////////////
#include "memkind_allocated.hpp"
#include <memkind.h>
// This code is example usage of C++11 features with custom allocator,
// support for C++11 is required.
#include <iostream>
#if __cplusplus > 199711L
#include <cstdlib>
#include <new>
#include <string>
// example class definition, which derive from memkind_allocated template to
// have objects allocated with memkind, and have alignment specified by
// alignas()
class alignas(128) memkind_allocated_example
: public memkind_allocated<memkind_allocated_example>
{
std::string message;
public:
// Override method for returning class default kind to make objects be by
// default allocated on High-Bandwidth Memory
static memkind_t getClassKind()
{
return MEMKIND_HBW;
}
memkind_allocated_example(std::string my_message)
{
this->message = my_message;
}
memkind_allocated_example()
{}
void print_message()
{
std::cout << message << std::endl;
std::cout << "Memory address of this object is: " << (void *)this
<< std::endl
<< std::endl;
}
};
int main()
{
memkind_t specified_kind = MEMKIND_HBW_HUGETLB;
memkind_allocated_example *default_kind_example =
new memkind_allocated_example(std::string(
"This object has been allocated using class default kind, which is: MEMKIND_DEFAULT"));
default_kind_example->print_message();
delete default_kind_example;
memkind_allocated_example *specified_kind_example =
new (specified_kind) memkind_allocated_example(std::string(
"This object has been allocated using specified kind, which is: MEMKIND_HBW_HUGETLB"));
specified_kind_example->print_message();
delete specified_kind_example;
// examples for using same approach for allocating arrays of objects, note
// that objects created that way can be initialized only with default
// (unparameterized) constructor
memkind_allocated_example *default_kind_array_example =
new memkind_allocated_example[5]();
delete[] default_kind_array_example;
memkind_allocated_example *specified_kind_array_example =
new (specified_kind) memkind_allocated_example[5]();
delete[] specified_kind_array_example;
return 0;
}
#else // If C++11 is not available - do nothing.
int main()
{
std::cout
<< "WARNING: because your compiler does not support C++11 standard,"
<< std::endl;
std::cout << "this example is only as a dummy placeholder." << std::endl;
return 0;
}
#endif
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