本文讲述了在使用libuv库进行I/O操作时正确的内存管理方法。为确保程序稳定运行，每次写操作都应分配新的uv_write_t结构，并在回调完成前避免释放、移动或覆盖其内存。对于uv_tcp_t句柄也应采取同样的处理方式，直至关闭回调执行完毕。
I don't think that can ever happen if you use libuv properly.
- You should allocate a new uv_write_t for every write to a handle. Do no reuse, free, move, or clobber it's memory until the write callback is made.
- Ditto for the uv_tcp_t handle; do not reuse, free, move, or clobber it's memory until the close callback is made.
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