Crank/memory_pool.hpp

#pragma once
#include "arena.hpp"
#include <array>

class memory_pool{
	std::array<arena,256> _pool;
public:
	memory_pool()
	: _pool()
	{
		_pool.fill(arena());
		for(auto& a : _pool)
			a = arena(4096);
	}

	memory_pool(memory_pool&) = delete;
	memory_pool(memory_pool&&) = delete;

	void* allocate(size_t sz)
	{
		for(auto& a : _pool)
		{
			void* ptr = a.allocate(sz);
			if(ptr!=nullptr)
				return ptr;
		}
		return nullptr;
	}

	void desallocate(void* ptr)
	{
		for(auto& a : _pool)
		{
			bool success = a.desallocate(ptr);
			if(success)
				return;
		}
	}
};