# PoolAllocator::GetAllocationCount

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

返回当前已分配块的数量。计算公式：`m_totalBlocks - m_freeBlocks`。

**参数：** 无

**返回：** 当前已分配块的数量

**复杂度：** O(1)

**示例：**

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

PoolAllocator pool(sizeof(int), 100);

size_t count = pool.GetAllocationCount(); // 0

void* blocks[10];
for (int i = 0; i < 10; ++i) {
    blocks[i] = pool.Allocate();
}

count = pool.GetAllocationCount(); // 10

for (int i = 0; i < 5; ++i) {
    pool.Free(blocks[i]);
}

count = pool.GetAllocationCount(); // 5
```

## 相关文档

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