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

ENQC. [CALLI 153]
22.41 ENQC. [CALLI 153]
FUNCTION
Returns information about the current state of ENQ/DEQ requests and
sets access rights for the ENQ/DEQ facility (privileged). Refer to
Volume 1 for more information about using the ENQ/DEQ calls. For more
information about the contents of the argument block, refer to the
ENQ. call.
CALLING SEQUENCE
Each function of the ENQC. call requires a different calling
sequence. The calling sequence for each ENQC. function is described
below, for the appropriate function.
The ENQC. function codes and their meanings are:
22.41.1 FUNCTION 0 (.ENQCS)
Returns a 3-word status block for each specified lock.
sequence for the .ENQCS function is:
MOVE ac, [XWD .ENQCS,addr]
MOVE I ac+l,buffer
ENQC. ac,
error return
skip return
The
calling
addr:
buffer:
EXP parameters
XWD O,request-id
EXP time limit
first word of first lock block
last word of last lock block
BLOCK *3
In the argument word:
a
addr is the address of the argument list.
a buffer is the address of a buffer (of length locks*3) for
storing the returned three-word status blocks.
a parameters is a word of t~e form:
B5+BI7+B35
a size is the size of the header block (1 to 3) .
a
locks is the number of lock blocks in the argument list.
a length is the length of each lock block (size plus number of
locks times the length of each lock block) .
The right half of addr+l may contain request-id, an
request identifier.
optional
a
time limit is an optional time limit for the request to be
granted.
22-119