pthread_rwlockattr_destroy(2)             pthread_rwlockattr_destroy(2)

  pthread_rwlockattr_destroy()

  NAME

    pthread_rwlockattr_destroy(), pthread_rwlockattr_init() - initialize or
    destroy a read-write lock attributes object

  SYNOPSIS

    #include 

    int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
    int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);

  DESCRIPTION

    The pthread_rwlockattr_init(2) function initializes the read-write lock
    attributes object referenced by the attr argument with default values.
    This object can be used in a call to pthread_rwlock_init(2) to set the
    attributes of the read-write lock object when it is initialized.

    The pthread_rwlockattr_destroy(2) function destroys the read-write lock
    attributes object referenced by the attr argument.

  RETURN VALUES

    On success, both functions return 0; otherwise, an error code is returned.

  ERRORS

    The pthread_rwlockattr_destroy() function can fail for the following
    reason:

    [EINVAL]
        The attr argument is invalid.

    The pthread_rwlockattr_init() function can fail for the following reason:

    [ENOMEM]
        Not enough free memory exists to initialize the read-write lock
        attributes object.

    Neither function returns [EINTR].

  SEE ALSO

    pthread_rwlock_destroy(2)

    pthread_rwlockattr_getpshared(2)

  USAGE NOTES

    All of these functions are thread safe.

    None of these functions are async-signal safe.