# 内存池MemoryPool

**Repository Path**: hc-team-top/MemoryPool

## Basic Information

- **Project Name**: 内存池MemoryPool
- **Description**: c++内存池
- **Primary Language**: C++
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2022-12-05
- **Last Updated**: 2022-12-11

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 内存池MemoryPool

- 模板类型为class时 使用格式如下
```
	struct hi
	{
		hi() {}
		vector<int> a;
		~hi() {}
	};
	qmem::SingleDataTypeMemoryPool<hi> sd2;
	//allocate 获取内存
	//自动调用构造函数
	hi* qw = sd2.allocate();
	//手动调用构析函数
	qw->~hi();
	//归还内存
	sd2.deallocate(qw);
```

- 不同内存池之间的性能
```
  size_t times = 100000000;
	size_t* a;

	//允许单个类型获取内存的内存池，不允许生成数组
	//release 获取内存和释放内存平均耗时 1.22e-09s
	qmem::SingleDataTypeMemoryPool<size_t> sd;
	clock_t start = clock();
	for (size_t i = 0; i < times; ++i)
	{
		a = sd.allocate();
		sd.deallocate(a);
	}
	cout << static_cast<long double>(clock() - start) / CLOCKS_PER_SEC / times << '\n';

	//允许所有类型获取内存的内存池，允许生成数组
	//release 获取内存和释放内存平均耗时 6.72e-09s
	qmem::BaseMemoryPool bmp;
	start = clock();
	for (size_t i = 0; i < times; ++i)
	{
		a = bmp.allocate<size_t>();
		bmp.deallocate(a);
	}
	cout << static_cast<long double>(clock() - start) / CLOCKS_PER_SEC / times << '\n';

	//标准库内存池
	//release 获取内存和释放内存平均耗时 4.991e-08s
	allocator<size_t> stdAllocator;
	start = clock();
	for (size_t i = 0; i < times; ++i)
	{
		a = stdAllocator.allocate(1);
		stdAllocator.deallocate(a, 1);
	}
	cout << static_cast<long double>(clock() - start) / CLOCKS_PER_SEC / times << '\n';
```