58 lines
1.5 KiB
Markdown
58 lines
1.5 KiB
Markdown
|
# IAllocator::GetPeakAllocated
|
||
|
|
|
||
|
|
```cpp
|
||
|
|
virtual size_t GetPeakAllocated() const = 0;
|
||
|
|
```
|
||
|
|
|
||
|
|
返回此分配器自创建以来达到的峰值分配字节数。该值在每次分配后更新，用于监控内存使用高峰。
|
||
|
|
|
||
|
|
**参数：** 无
|
||
|
|
|
||
|
|
**返回：** 峰值分配字节数
|
||
|
|
|
||
|
|
**复杂度：** O(1)
|
||
|
|
|
||
|
|
**示例：**
|
||
|
|
|
||
|
|
```cpp
|
||
|
|
#include <XCEngine/Memory/IAllocator.h>
|
||
|
|
|
||
|
|
class MyAllocator : public IAllocator {
|
||
|
|
size_t m_peak = 0;
|
||
|
|
size_t m_current = 0;
|
||
|
|
public:
|
||
|
|
void* Allocate(size_t size, size_t alignment = 0) override {
|
||
|
|
void* ptr = ::operator new(size);
|
||
|
|
m_current += size;
|
||
|
|
if (m_current > m_peak) m_peak = m_current;
|
||
|
|
return ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
void Free(void* ptr) override {
|
||
|
|
if (ptr) {
|
||
|
|
size_t size = 256; // 需要外部记录
|
||
|
|
::operator delete(ptr);
|
||
|
|
m_current -= size;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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 m_peak; }
|
||
|
|
size_t GetAllocationCount() const override { return 0; }
|
||
|
|
const char* GetName() const override { return "MyAllocator"; }
|
||
|
|
};
|
||
|
|
|
||
|
|
MyAllocator alloc;
|
||
|
|
alloc.Allocate(100);
|
||
|
|
size_t peak1 = alloc.GetPeakAllocated(); // 100
|
||
|
|
alloc.Allocate(50);
|
||
|
|
size_t peak2 = alloc.GetPeakAllocated(); // 150
|
||
|
|
```
|
||
|
|
|
||
|
|
## 相关文档
|
||
|
|
|
||
|
|
- [IAllocator 总览](allocator.md) - 返回类总览
|