CEEOPMI

CEEOPMI initializes the mutex or read-write lock referred to by lock_object with the attributes identified by attr_object. If this function fails, the mutex or read-write lock is not initialized and the contents of lock_object is undefined.

CEE_MUTEX      *lock_object;
CEE_LOCKATTR   *attr_object;
INT4           *lock_type;
FEED_BACK      *fc;

CEEOPMI

Call this CWI interface as follows:

L     R15,CEECAALEOV-CEECAA(,R12)     CAA address is in R12
L     R15,0280(,R15)
BALR  R14,R15

lock_object (input/output)

The mutex or read-write lock to be initialized.

attr_object (input)

The attributes object used to initialize the mutex or read-write lock.

lock_type (input)

A full word integer with the following defined values:

X'00000000'

mutex (without _OPEN_SYS_MUTEX_EXT feature)

X'00000001'

read-write lock

X'00000002'

extended mutex (with _OPEN_SYS_MUTEX_EXT feature)

fc (output/optional)

The feedback code returned by the service. It indicates the degree of success in initializing the lock_object.

The following message identifiers and associated severity can be returned by the service in the feedback code fc.