39 lines
809 B
Markdown
39 lines
809 B
Markdown
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# PoolAllocator::Free
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```cpp
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void Free(void* ptr) override;
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```
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将内存块归还到空闲链表中。如果 `ptr` 为 `nullptr` 则无效果。释放操作将块插入空闲链表头部。必须传入从此池分配的指针，传入外部指针会导致未定义行为。
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**参数：**
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- `ptr` - 指向要释放的内存块
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**返回：** 无
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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/PoolAllocator.h>
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PoolAllocator pool(sizeof(int), 100);
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void* block = pool.Allocate();
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if (block) {
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int* num = static_cast<int*>(block);
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*num = 123;
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pool.Free(block); // 归还到空闲链表
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block = nullptr;
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}
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// 检查空闲块数量
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size_t freeCount = pool.GetFreeBlockCount();
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```
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## 相关文档
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- [PoolAllocator 总览](pool-allocator.md) - 返回类总览
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