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authorJustus Winter <4winter@informatik.uni-hamburg.de>2013-11-22 10:04:07 +0100
committerJustus Winter <4winter@informatik.uni-hamburg.de>2014-10-01 09:03:51 +0200
commit56dc414b0699d1576fc1deb983a4bd2b0ef10f5d (patch)
tree6fabf73a6457fc17d76b7600a35f01a0be3eb069 /doc
parentc4baf67b71e20d1fdd2cc6bda1a2ea15e9853cdd (diff)
include: add msgh_protected_payload to mach_msg_header_t
* include/mach/message.h (mach_msg_header_t): Add msgh_protected_payload as a union with msgh_local_port. * doc/mach.texi (Message Format): Document msgh_protected_payload.
Diffstat (limited to 'doc')
-rw-r--r--doc/mach.texi9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/mach.texi b/doc/mach.texi
index 3175df1..671e0d0 100644
--- a/doc/mach.texi
+++ b/doc/mach.texi
@@ -1330,6 +1330,15 @@ which is conventionally used as a reply port by the recipient of the
message. The field must carry a send right, a send-once right,
@code{MACH_PORT_NULL}, or @code{MACH_PORT_DEAD}.
+@item unsigned long msgh_protected_payload
+The @code{msgh_protected_payload} field carries a payload that is set
+by the kernel during message delivery. The payload is an opaque
+identifier that can be used by the receiver to lookup the associated
+data structure.
+
+It is only valid in received messages. See @ref{Message Receive} for
+further information.
+
@item mach_port_seqno_t msgh_seqno
The @code{msgh_seqno} field provides a sequence number for the message.
It is only valid in received messages; its value in sent messages is