tis_read_lock - Acquires a read-write lock for read access
tis_rwlock_t *lock );
Standard C Library (libc.so, libc.a)
Address of the read-write lock.
This routine acquires a read-write lock for read access.
This routine waits for any existing lock holder for write
access to relinquish its lock before granting the lock for
read access. This routine returns when the lock is
acquired. If the lock is already held for read access, the
lock is granted.
For each call to tis_read_lock(3) that successfully
acquires the lock for read access, a corresponding call to
tis_read_unlock(3) must be issued.
Note that the type tis_rwlock_p is a pointer to type
If an error condition occurs, this routine returns an
integer value indicating the type of error. Possible
return values are as follows: Successful completion. The
value specified by lock is invalid.
Functions: tis_read_trylock(3), tis_read_unlock(3),
Manuals: Guide to DECthreads and Programmer's Guide
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