Libuv 是一个专注于异步 I/O 的多平台支持库，主要用于 Node.js。
特性包括：
非阻塞 TCP 套接字
非阻塞命名管道
UDP
定时器
子进程生成
通过 uv_getaddrinfo 实现异步 DNS
异步文件系统 API：uv_fs_*
高分辨率时间：uv_hrtime
正在运行程序路径查找：uv_exepath
线程池调度：uv_queue_work
TTY控制的ANSI转义代码: uv_tty_t
文件系统事件现在支持 inotify, ReadDirectoryChangesW 和 kqueue。很快会支持事件端口：uv_fs_event_t
进程间的 IPC 与套接字共享：uv_write2
1.25.0 版本更新内容如下：
Revert "win,fs: retry if uv_fs_rename fails" (Ben Noordhuis)
aix: manually trigger fs event monitoring (Gireesh Punathil)
unix: rename WRITE_RETRY_ON_ERROR macro (Ben Noordhuis)
darwin: DRY platform-specific error check (Ben Noordhuis)
unix: refactor uv__write() (Ben Noordhuis)
unix: don't send handle twice on partial write (Ben Noordhuis)
tty,win: fix Alt+key under WSL (Bartosz Sosnowski)
build: support running tests in out-of-tree builds (Jameson Nash)
fsevents: really watch files with fsevents on macos 10.7+ (Jameson Nash)
thread,mingw64: need intrin.h header for SSE2 MemoryBarrier (Jameson Nash)
win: fix sizeof-pointer-div warning (cjihrig)
unix,win: add uv_os_uname() (cjihrig)
win, tty: fix CreateFileW() return value check (Bartosz Sosnowski)
unix: enable IPv6 tests on OpenBSD (ptlomholt)
test: fix test-ipc spawn_helper exit_cb (Santiago Gimeno)
test: fix test-ipc tests (Santiago Gimeno)
unix: better handling of unsupported F_FULLFSYNC (Victor Costan)
win,test: de-flake fs_event_watch_dir_short_path (Refael Ackermann)
win: fix msvc warning (sid)
openbsd: switch to libuv's barrier implementation (ptlomholt)
unix,stream: fix zero byte writes (Santiago Gimeno)
ibmi: return EISDIR on read from directory fd (Kevin Adler)
build: wrap long lines in Makefile.am (cjihrig)