shell / filesystem中的非阻塞/异步fifo /命名管道？

Is there a way to create non blocking/asynchronous named pipe or something similar in shell? So that programs could place lines in it, those lines would stay in ram, and when some program could read some lines from pipe, while leaving what it did not read in fifo? It is also very probable that programs can be writing and reading to this fifo at the same time. At first I though maybe this could be done using files, but after searching a web for a bit it seems nothing good can come from the fact that file is read and written at same time. Named pipes would almost work, just there are two problems: first they block reads/writes if there is no one at the other end, second even if I let writing to blocked and set two processes to write to pipe while no one is reading, by trying to write one line with each process, and then try Is there a way to create non blocking/asynchron