API (接口垫片)

  • used to implement new APIs that are not supported by the underlying OS or hardware

Compatibility (兼容性垫片)

  • Used to provide compatibility between different versions of software
  • When a new version of software is released, it may break compatibility with older applications that rely on the older version’s APIs
  • A shim can be used to translate between the two versions of the API, allowing older applications to continue to work with the newer software
  • A shim might be used to adapt a Windows application to run on Linux