Semester : SEMESTER 6
Subject : Embedded System
Year : 2018
Term : MARCH
Scheme : 2015 Full Time
Course Code : EC 308
Page:61
Mailbox Type
Permitted by an OS
ا تا صم അത്ത க் டு
Iti One Message Multiple
பணக் Per Mailbox റില്
Messages with a Priority
Queueing Parameter for
Up (a) each message
OS Functions for the Mailbox
Create Write Accept Read Query
(Post) 7 (Pend)
⋅⋅∙⋅ 0
.م 7.9 (9) Mailbox types at the different operating systems (OSes) (0) Initialization and
functions for a mailbox at an OS
3. OSMBoxWait (pend) waits for a mailbox message, which is read when received.
no wail
4. OSMBoxAccept reads the current message pointer after checking the presence yes OF 10 (
Deletes the mailbox when read.
5. OSMBoxQuery queries the mailbox when read and not needed later.
An ISR can post (but not wait) into the mailbox of a task.