The basic mechanism underlying CSPs is the synchronization of two processes via input-output (I/O). I/O occurs when process A indicates that it is ready to output to process B, and process B states that it is ready to input from process A. If one of these happens without the other being true, the process is put on a wait queue until the other process is ready. CSPs are different from integration solutions in that they are not as loosely coupled, nor do the “pipes” provide any queuing mechanisms.
