Facilitating Transaction Processing

DosTransactNPipe and DosCallNPipe facilitate the use of named pipes by combining other named pipe functions. Compared to calling the other functions separately, DosTransactNPipe and DosCallNPipe provide significant performance gains for applications that operate in a networked environment. They can also be used by local processes. However, both of these functions can be used only with duplex message pipes.

• DosTransactNPipe performs a transaction (a DosWrite followed by DosRead) on a duplex message pipe.

• DosCallNPipe has the combined effect of DosOpen, DosTransactNPipe, and DosClose, and is referred to as a procedure call. It provides an efficient means of implementing local and remote procedure call interfaces between processes.