# PoolAllocator::GetTotalFreed

```cpp
size_t GetTotalFreed() const override;
```

返回当前空闲的内存总量（字节）。计算公式：`m_freeBlocks * m_blockSize`。

**参数：** 无

**返回：** 当前空闲块的字节数

**复杂度：** O(1)

**示例：**

```cpp
#include <XCEngine/Memory/PoolAllocator.h>

PoolAllocator pool(sizeof(int), 100);

size_t freed = pool.GetTotalFreed(); // 100 * sizeof(int)

void* block = pool.Allocate();
freed = pool.GetTotalFreed(); // 99 * sizeof(int)

pool.Free(block);
freed = pool.GetTotalFreed(); // 100 * sizeof(int)
```

## 相关文档

- [PoolAllocator 总览](pool-allocator.md) - 返回类总览