Typed items and the 'C' bit

Espen Skoglund esk at ira.uka.de
Mon Apr 30 12:04:57 CEST 2007

[Jonathan S Shapiro]
> Question: does the 'C' bit provide a real advantage, or is it a
> historical curiosity?  If there is an advantage, can somebody give
> an example?

The 'C' bit is a historical curiosity, and in fact, the bit was never
interpreted or set during the IPC transfer phase.  For specification
updates that I have worked on I have defined the C bit only for string
items and use it only for specifying multiple string items for receive
buffers.  The bit is completely ignored for send string items.


More information about the l4-hackers mailing list