/*
* Copyright (C) 2017 - 2018 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 "memory_manager.h"
#include <vector>
#include <random>
class RandomSizesAllocator
{
private:
std::vector<MemoryManager> allocated_memory;
memkind_t kind;
std::default_random_engine generator;
std::uniform_int_distribution<int> memory_distribution;
size_t get_random_size()
{
return memory_distribution(generator);
}
public:
RandomSizesAllocator(memkind_t kind, size_t min_size, size_t max_size,
int max_allocations_number) :
kind(kind),
memory_distribution(min_size, max_size)
{
allocated_memory.reserve(max_allocations_number);
}
size_t malloc_random_memory()
{
size_t size = get_random_size();
allocated_memory.emplace_back(kind, size);
return size;
}
size_t free_random_memory()
{
if (empty())
return 0;
std::uniform_int_distribution<int> distribution(0, allocated_memory.size() - 1);
int random_index = distribution(generator);
auto it = std::begin(allocated_memory) + random_index;
size_t size = it->size();
allocated_memory.erase(it);
return size;
}
bool empty()
{
return allocated_memory.empty();
}
};