36 lines
703 B
Markdown
36 lines
703 B
Markdown
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# PoolAllocator::Reallocate
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```cpp
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void* Reallocate(void* ptr, size_t newSize) override;
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```
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内存池分配器不支持重新分配。此方法始终返回 `nullptr`，原内存块保持不变。
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**参数：**
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- `ptr` - 不被使用
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- `newSize` - 不被使用
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**返回：** 始终返回 `nullptr`
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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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// Reallocate 不支持
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void* newBlock = pool.Reallocate(block, 256);
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if (!newBlock) {
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// 内存池不支持重新分配
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// 原 block 仍然有效
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}
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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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