在C++中分配和释放类整数句柄的快速算法

#include <iostream>
#include <vector>

class Handle
{
public:
    int value;

    Handle(int val) : value(val) {}
};

class ObjectPool
{
private:
    std::vector<Handle*> pool;
    int capacity;
    int count;

public:
    ObjectPool(int size) : capacity(size), count(0)
    {
        for (int i = 0; i < capacity; i++)
        {
            pool.push_back(new Handle(i));
        }
    }

    Handle* allocate()
    {
        if (count < capacity)
        {
            Handle* handle = pool[count];
            count++;
            return handle;
        }
        else
        {
            std::cout << "Object pool is full!" << std::endl;
            return nullptr;
        }
    }

    void release(Handle* handle)
    {
        if (count > 0)
        {
            count--;
            pool[count] = handle;
        }
        else
        {
            std::cout << "Object pool is empty!" << std::endl;
        }
    }
};

int main()
{
    ObjectPool pool(10);

    // 分配句柄
    Handle* handle1 = pool.allocate();
    if (handle1 != nullptr)
    {
        std::cout << "Allocated handle: " << handle1->value << std::endl;
    }

    // 释放句柄
    pool.release(handle1);
    std::cout << "Released handle: " << handle1->value << std::endl;

    return 0;
}