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38 lines
886 B
Markdown
38 lines
886 B
Markdown
# LinearAllocator::Clear
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```cpp
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void Clear();
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```
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清空分配器，将内部偏移量重置为 0，所有已分配的内存被视为已释放。下一次 `Allocate` 将从缓冲区起始位置开始。此方法不实际释放或修改底层内存，适合作为帧分配器使用，每帧开始时调用 Clear 重置。
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**参数：** 无
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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/LinearAllocator.h>
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LinearAllocator allocator(1024 * 1024);
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// 第一帧
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void* frame1_ptr = allocator.Allocate(256);
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void* frame1_ptr2 = allocator.Allocate(128);
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// ... 第一帧渲染逻辑
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// 帧结束时清空
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allocator.Clear();
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// 第二帧重新开始
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void* frame2_ptr = allocator.Allocate(256);
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// 此时 frame1_ptr 已无效，但内存已被回收复用
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```
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## 相关文档
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- [LinearAllocator 总览](linear-allocator.md) - 返回类总览
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