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XCEngine/docs/api/memory/linear-allocator/get-total-allocated.md

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# LinearAllocator::GetTotalAllocated
```cpp
size_t GetTotalAllocated() const override;
```
返回自分配器创建以来的累计分配字节数。对于线性分配器,这等于当前已使用的字节数(`m_offset`)。
**参数:** 无
**返回:** 累计已分配的字节数
**复杂度:** O(1)
**示例:**
```cpp
#include <XCEngine/Memory/LinearAllocator.h>
LinearAllocator allocator(1024);
size_t total1 = allocator.GetTotalAllocated(); // 0
allocator.Allocate(256);
allocator.Allocate(128);
size_t total2 = allocator.GetTotalAllocated(); // 384
allocator.Clear();
size_t total3 = allocator.GetTotalAllocated(); // 0Clear 后重置)
```
## 相关文档
- [LinearAllocator 总览](linear-allocator.md) - 返回类总览