VMS Help POSIX Threads, TIS routines, tis_write_lock  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Acquires a read-write lock for write access.

1 - C Binding

    #include <tis.h>

    int
    tis_write_lock (
             tis_rwlock_t   *lock);

2 - Arguments

 lock

    Address of the read-write lock to be acquired for write access.

3 - Description

    This routine acquires a read-write lock for write access. This
    routine waits for any other active locks (for either read or
    write access) to be unlocked before this acquisition request is
    granted.

    This routine returns when the specified read-write lock is
    acquired for write access.

4 - Return Values

    If an error condition occurs, this routine returns an integer
    value indicating the type of error. Possible return values are as
    follows:

    Return      Description

    0           Successful completion.
    [EINVAL]    The value specified by lock is not a valid read-write
                lock.

5 - Associated Routines

       tis_read_lock()
       tis_read_trylock()
       tis_read_unlock()
       tis_rwlock_destroy()
       tis_rwlock_init()
       tis_write_trylock()
       tis_write_unlock()