Buffer size used for FIFOS

[Justin T. Gibbs]

Joerg Schilling wrote:

> How are named pipes implemented on Cygwin?
> 
> What Microsoft calls "named pipes" are rather UNIX domain sockets that allow
> a reliable n to 1 communication but not what POSIX calls named-pipes/FIFO.
> 
> Jörg

A windows named pipe is used to emulate a POSIX FIFO.  When a FIFO is opened,
Cygwin searches all processes for one that has the named pipe already open.  If
found, a handle to the named pipe is duplicated (the windows API supports "dup"
across processes).  Otherwise a named pipe is created.  Since all handles in all
processes point to the same named pipe, N way communication is supported.  This
is not the typical way Windows named pipes are used (see examples in MSDN), but
it does appear to provide the desired semantics.

--
Justin