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XCEngine/docs/api/memory/allocator/get-allocation-count.md
ssdfasd a9f882f233 docs: 修正 API 文档准确性 (第二轮检查)
修复的问题:
- math: 修复 Quaternion::Normalize 链接错误
- containers: HashMap 迭代器示例使用不存在的 cbegin/cend,删除冗余构造函数声明
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- memory: 修正 LinearAllocator::Reallocate 返回 nullptr,ProxyAllocator 统计描述,头文件路径 IAllocator.h -> Allocator.h
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2026-03-19 00:31:14 +08:00

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Markdown

# IAllocator::GetAllocationCount
```cpp
virtual size_t GetAllocationCount() const = 0;
```
返回当前处于已分配状态(未释放)的内存块数量。此方法用于监控活跃分配的数量。
**参数:**
**返回:** 当前已分配块的数量
**复杂度:** O(1)
**示例:**
```cpp
#include <XCEngine/Memory/Allocator.h>
class MyAllocator : public IAllocator {
size_t m_count = 0;
public:
void* Allocate(size_t size, size_t alignment = 0) override {
++m_count;
return ::operator new(size);
}
void Free(void* ptr) override {
if (ptr) {
--m_count;
::operator delete(ptr);
}
}
void* Reallocate(void* ptr, size_t newSize) override { /* ... */ }
size_t GetTotalAllocated() const override { return 0; }
size_t GetTotalFreed() const override { return 0; }
size_t GetPeakAllocated() const override { return 0; }
size_t GetAllocationCount() const override { return m_count; }
const char* GetName() const override { return "MyAllocator"; }
};
MyAllocator alloc;
alloc.Allocate(64);
alloc.Allocate(128);
size_t count = alloc.GetAllocationCount(); // 返回 2
```
## 相关文档
- [IAllocator 总览](allocator.md) - 返回类总览