_lwp_cond_signal(2)                              _lwp_cond_signal(2)


       NAME
             _lwp_cond_signal - wake up a single LWP waiting on a condition
             variable

       SYNOPSIS
             #include <synch.h>
             int _lwp_cond_signal(lwp_cond_t *cond);

          Parameters
             cond    pointer to condition variable to be signaled

       DESCRIPTION
             _lwp_cond_signal wakes up a single lightweight process (LWP),
             if one exists, waiting on the condition cond.

             If more than one LWP is waiting on a condition, the scheduling
             policy determines which LWP is awakened.

             _lwp_cond_signal has no effect if there are no LWPs waiting on
             the indicated condition.

          cond Parameter
             The condition variable denoted by cond must previously have
             been statically initialized (zero-filled).

          Return Values
             _lwp_cond_signal returns zero for success and an error number
             for failure, as described below.

          Errors
             If any of the following conditions is detected,
             _lwp_cond_signal returns the corresponding value:

             EINVAL   Invalid argument specified.

             EFAULT   The cond parameter points to an illegal address.
                      (This error may not be detected; a SIGSEGV signal may
                      be posted to the faulting LWP if an illegal address
                      is used.)

       USAGE
             See the description of how to use condition variables under
             USAGE on cond_init(3synch).





                           Copyright 1994 Novell, Inc.               Page 1

      _lwp_cond_signal(2)                              _lwp_cond_signal(2)


      REFERENCES
            _lwp_cond_broadcast(2), _lwp_cond_timedwait(2),
            _lwp_cond_wait(2), cond_broadcast(3synch),
            cond_destroy(3synch), cond_init(3synch), cond_signal(3synch),
            cond_timedwait(3synch), cond_wait(3synch)

      NOTICES
            Lightweight processes (LWPs) are internal interfaces and are
            subject to change.  Their use should be avoided.







































                          Copyright 1994 Novell, Inc.               Page 2