TOPS-10 Monitor Calls Manual Volume 2 AA-K039D ... - Trailing-Edge

IPCFR. [CALLI 142]
PMBI
PMBl+l
PMBl+2
PMBl+3
32,,3
400004,,1001
ASCIZ/CORP/
o
;User code and function code
;The requested PID
;The symbolic name
The IPCFR. monitor call can take the skip return and return an error
code in the flag word of the packet header block. For example, word 0
of the packet header block could contain the following:
PHB/ 0520
This means that the length of the packet message block specified in
the IPCFR. monitor call was not long enough, so the monitor returned
error code 5 in the flag word. The 20 in the flag word indicates that
the message in the receiver's input queue is from [SYSTEM] INFO.
If a process sends a request to [SYSTEM]INFO to obtain the PID
associated with the symbolic name "FRED," the following could result:
Location Contents
AC
PHB
PHB+l
PHB+2
PHB+3
PMB
PMB+l
PMB+2
o
7620
2,,1003
164,,1011
10"PMB
11, , 1
o
ASCIZ/FRED/
;indicating a skip return and no
;errors set in the AC; no more packets
;in queue.
;t;.he flag word
;the sender's PID
;the receiver's PID
;length and addr of message block
;user code and function code
;no response
;symbolic name
The first word of the packet,
indicates the following:
PHB, contains 7620. This value
o
76 is the error code indicating that the symbolic name "FRED"
is not associated with any currently assigned PID.
o 2 indicates that the call to [SYSTEM]INFO succeeded, and a
normal return was taken. The number of packets still in the
queue is stored in the ac.
o 0 indicates that the packet is not a "returned to sender"
packet.
The call to [SYSTEM]INFO successed, and a normal return was taken.
The number of packets still in the queue is stored in the ac.
RELATED CALLS
o
o
o
IPCFM.
IPCFQ.
IPCFS.
22-191