58 lines
1.5 KiB
Markdown
58 lines
1.5 KiB
Markdown
# IAllocator::GetPeakAllocated
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```cpp
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virtual size_t GetPeakAllocated() const = 0;
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```
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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。
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**参数：** 无
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**返回：** 峰值分配字节数
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**复杂度：** O(1)
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**示例：**
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```cpp
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#include <XCEngine/Memory/Allocator.h>
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class MyAllocator : public IAllocator {
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size_t m_peak = 0;
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size_t m_current = 0;
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public:
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void* Allocate(size_t size, size_t alignment = 0) override {
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void* ptr = ::operator new(size);
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m_current += size;
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if (m_current > m_peak) m_peak = m_current;
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return ptr;
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}
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void Free(void* ptr) override {
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if (ptr) {
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// size 需要分配器内部记录或通过其他机制获取
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::operator delete(ptr);
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m_current -= 256; // 示例中硬编码
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}
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}
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void* Reallocate(void* ptr, size_t newSize) override { /* ... */ }
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size_t GetTotalAllocated() const override { return 0; }
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size_t GetTotalFreed() const override { return 0; }
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size_t GetPeakAllocated() const override { return m_peak; }
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size_t GetAllocationCount() const override { return 0; }
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const char* GetName() const override { return "MyAllocator"; }
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};
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MyAllocator alloc;
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alloc.Allocate(100);
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size_t peak1 = alloc.GetPeakAllocated(); // 100
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alloc.Allocate(50);
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size_t peak2 = alloc.GetPeakAllocated(); // 150
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```
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## 相关文档
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- [IAllocator 总览](allocator.md) - 返回类总览
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