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Stable release
1.45.0[1] Edit this on Wikidata / 19 May 2023; 17 days ago (19 May 2023)
Written inC
Operating systemCross-platform
PlatformLinux, Android, Windows and OS X/Darwin,[2] FreeBSD, OpenBSD
TypeI/O abstraction library
LicenseMIT Edit this on Wikidata

libuv is a multi-platform C library that provides support for asynchronous I/O based on event loops. It supports epoll(4), kqueue(2), Windows IOCP, Solaris event ports and Linux io_uring. It is primarily designed for use in Node.js but it is also used by other software projects.[3] It was originally an abstraction around libev or Microsoft IOCP, as libev doesn't support IOCP on Windows. In node-v0.9.0's version of libuv, the dependency on libev was removed.[4]



Origin of the name[edit]

According to libuv developer Ben Noordhuis, the name libuv originally had no specific meaning, but as people kept asking about it, so they made something up. They came up with Unicorn Velociraptor, which became the logo of the library.[5]

See also[edit]


  1. ^ "Release 1.45.0". 19 May 2023. Retrieved 5 June 2023.
  2. ^ a b "The libuv project page and source code". GitHub. Retrieved 30 June 2016.
  3. ^ "Projects that use libuv". libuv GitHub project page. Retrieved 30 June 2016.
  4. ^ An introduction to libuv
  5. ^ "What does UV stand for in libuv?". Retrieved 7 June 2022.

External links[edit]