| # QUIC platform | 
 |  | 
 | This platform/ directory exists in order to allow QUIC code to be built on | 
 | numerous platforms. It contains two subdirectories: | 
 |  | 
 | -   api/ contains platform independent class definitions for fundamental data | 
 |     structures (e.g., IPAddress, SocketAddress, etc.). | 
 | -   impl/ contains platform specific implementations of these data structures. | 
 |     The content of files in impl/ will vary depending on the platform. | 
 |  | 
 | Code in the parent quic/ directory should not depend on any platform specific | 
 | code, other than that found in impl/. |