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

    Causes a thread to wait for the specified condition variable to
    be signaled or broadcast.

1 - C Binding

    #include <tis.h>

    int
    tis_cond_wait (
                pthread_cond_t   *cond,
                pthread_mutex_t   *mutex);

2 - Arguments

 cond

    Address of the condition variable (passed by reference) on which
    to wait.

 mutex

    Address of the mutex (passed by reference) that is associated
    with the condition variable specified in cond.

3 - Description

    When threads are present, this routine causes a thread to wait
    for the specified condition variable cond to be signaled or
    broadcast.

    Calling this routine in a single-threaded environment is a coding
    error. Because no other thread exists to issue a call to tis_
    cond_signal() or tis_cond_broadcast(),  using this routine in a
    single-threaded environment forces the program to exit.

    For further information about actions taken when threads are
    present, refer to the pthread_cond_wait() description.

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 cond is not a valid condition
                variable or the value specified by mutex is not a
                valid mutex, or

                Different mutexes are supplied for concurrent
                tis_cond_wait()  operations on the same condition
                variable, or

                The mutex was not owned by the calling thread at the
                time of the call.

5 - Associated Routines

       tis_cond_broadcast()
       tis_cond_destroy()
       tis_cond_init()
       tis_cond_signal()