CEEOPRL2

C library interface: pthread_rwlock_rdlock()

CEEOPRL2 is the C-callable Language Environment interface to the pthread_ rwlock_rdlock() function for a read lock.

Syntax

int CEEOPRL2 (rwlock)

pthread_rwlock_t  *rwlock;

CEEOPRL2

Call this CWI interface as follows:

L     R15,CEECAALEOV-CEECAA(,R12) 
L     R15,520(,R15)
BALR  R14,R15

rwlock (input)

Identifies the read-write lock to be locked for read.

CEEOPRL2 can return the following function values:

0

Function completed successfully.

-1

An error occurred; errno can be one of the following values:

EINVAL: The specified read-write lock is not valid.
EDEADLK: The specified read-write lock is already locked.
EAGAIN: The specified read-write lock could not be acquired because the maximum number of recursive locks for the read-write lock has been exceeded.
ENOMEM: Not enough memory to acquire a lock.