ssdfasd
98c764bab9
- Add missing PoolAllocator class overview with methods table - Add missing LinearAllocator class overview with methods table - Add missing ProxyAllocator class overview with methods table - Fix PoolAllocator::Allocate example code and comments - Clarify ProxyAllocator::Free totalFreed calculation behavior - Fix CreateLinearAllocator complexity from O(size) to O(1) - Add note about Reallocate thread safety in ProxyAllocator
39 lines
973 B
Markdown
39 lines
973 B
Markdown
# ProxyAllocator::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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重新分配内存。调用转发到底层分配器，不记录额外统计信息（底层分配器的返回值直接返回）。此方法线程安全，内部使用互斥锁保护。
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**参数：**
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- `ptr` - 现有内存块指针
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- `newSize` - 新的字节大小
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**返回：** 成功返回新指针，失败返回 `nullptr`（由底层分配器决定）
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**复杂度：** O(n)（底层分配器 + 数据复制）
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**示例：**
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```cpp
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#include <XCEngine/Memory/MemoryManager.h>
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#include <XCEngine/Memory/ProxyAllocator.h>
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IAllocator* sysAlloc = MemoryManager::Get().GetSystemAllocator();
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ProxyAllocator proxy(sysAlloc, "TrackedAlloc");
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void* p1 = proxy.Allocate(128);
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void* p2 = proxy.Reallocate(p1, 256);
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if (p2) {
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// 重新分配成功
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} else {
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// 失败，p1 仍然有效
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}
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```
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## 相关文档
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- [ProxyAllocator 总览](proxy-allocator.md) - 返回类总览
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