# IAllocator::GetTotalAllocated

```cpp
virtual size_t GetTotalAllocated() const = 0;
```

返回此分配器自创建以来累计分配的字节总数。这是一个只读查询操作，不会修改任何内部状态。

**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/Allocator.h>

class MyAllocator : public IAllocator {
    size_t m_allocated = 0;
public:
    void* Allocate(size_t size, size_t alignment = 0) override {
        void* ptr = ::operator new(size);
        m_allocated += size;
        return ptr;
    }
    
    void Free(void* ptr) override {
        if (ptr) ::operator delete(ptr);
    }
    
    void* Reallocate(void* ptr, size_t newSize) override { /* ... */ }
    
    size_t GetTotalAllocated() const override { return m_allocated; }
    size_t GetTotalFreed() const override { return 0; }
    size_t GetPeakAllocated() const override { return m_allocated; }
    size_t GetAllocationCount() const override { return 0; }
    const char* GetName() const override { return "MyAllocator"; }
};

MyAllocator alloc;
alloc.Allocate(100);
alloc.Allocate(200);
size_t total = alloc.GetTotalAllocated(); // 返回 300
```

## 相关文档

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