MPE/iX Intrinsics Reference Manual (32650-90875)

488 Chapter8
Command Definitions (HPMERGEEND-LOGSTATUS)
LOCKLOCRIN
LOCKLOCRIN
NM and CM callable.
Locks a local resource identification number (RIN).
Syntax
I16V U16
LOCKLOCRIN(
rinnum,lockflag );
Parameters
rinnum 16-bit signed integer by value (required)
A previously allocated local RIN; valid values range from 1 to the value
specified in the
rincount parameter of the GETLOCRIN intrinsic.
lockflag 16-bit unsigned integer by reference (required)
Passes and returns conditional or unconditional RIN locking specification
through bit (15:1).
Value Meaning
0 Locking takes place only if the RIN is currently unlocked.
If the RIN is not unlocked, control returns to the calling
process immediately with the condition code CCG (0).
1 Locking takes place unconditionally. If the RIN is
currently locked, the calling process suspends until the
RIN becomes unlocked.
All other bits are ignored. See the discussion of condition codes for the
values returned in
lockflag .
Operation Notes
Any local RIN assigned to a job can be locked, one process at a time, by using the
LOCKLOCRIN intrinsic. When this is done, other processes within the job that attempt to
lock that RIN are suspended until the locked RIN is released.
Condition Codes
The following condition codes are possible if lockflag bit (15:1)=1:
CCE (2) Request granted. If the calling process has already locked the RIN,
lockflag bit (15:1) is set to 1. If the RIN is free, lockflag bit (15:1) is set
to 0.
CCG (0) Not returned.
CCL (1) Request denied. The RIN is invalid; the
rinnum was too large, no local