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51 lines
1.3 KiB
Markdown
51 lines
1.3 KiB
Markdown
# IAllocator::GetTotalFreed
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```cpp
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virtual size_t GetTotalFreed() const = 0;
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```
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返回此分配器自创建以来累计释放的字节总数。部分分配器（如 LinearAllocator）可能始终返回 0，因为它们不跟踪单个释放操作。
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**参数：** 无
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**返回：** 累计已释放的字节数
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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_freed = 0;
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public:
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void* Allocate(size_t size, size_t alignment = 0) override { return ::operator new(size); }
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void Free(void* ptr) override {
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if (ptr) {
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size_t size = 256; // 需要外部记录
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::operator delete(ptr);
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m_freed += size;
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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 m_freed; }
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size_t GetPeakAllocated() const override { return 0; }
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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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void* ptr = alloc.Allocate(128);
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alloc.Free(ptr);
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size_t freed = alloc.GetTotalFreed(); // 返回 128
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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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