26 lines
497 B
Markdown
26 lines
497 B
Markdown
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# ResourceCache::OnMemoryPressure
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```cpp
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void OnMemoryPressure(size_t requiredBytes)
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```
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内存压力回调。当系统内存紧张时调用此方法，从 LRU 列表头部开始驱逐资源，直到释放足够空间。
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**参数：**
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- `requiredBytes` - 需要释放的字节数
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**返回：** 无
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**复杂度：** O(n)
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**示例：**
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```cpp
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// 需要 100MB 空间
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cache.OnMemoryPressure(100 * 1024 * 1024);
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```
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## 相关文档
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- [ResourceCache 总览](resourcecache.md) - 返回类总览
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