dg_sem_post(2) — DG/UX R4.11MU05



dg_sem_post(2)                 DG/UX R4.11MU05                dg_sem_post(2)


NAME
       dgsempost - post on a binary semaphore

SYNOPSIS
       int  dgsempost (int semid)

   where:
       semid    The id of any binary semaphore for the system

DESCRIPTION
       The dgsempost system call will post the binary semaphore.  If any
       thread is blocked pending on the semaphore, the thread will wake up.
       If no thread is pending the semaphore, it will be pre-posted such
       that when it is pended, the calling thread will return immediately.

ACCESS CONTROL
       On a system with DG/UX information security, appropriate privilege is
       required by having one or more specific capabilities enabled in the
       effective capability set of the user.  See capdefaults for the
       default capabilities for this command.

RETURN VALUE
       0         Completed successfully.

       -1        An error occurred.  errno is set to indicate the error.

DIAGNOSTICS
       Errno may be set to one of the following error codes:

       EINVAL  semid is not valid.

       EACCES  The system supports DG/UX information security and the caller
               does not have appropriate privilege.

SEE ALSO
       dgsemgetid(2), dgsemreleaseid(2), dgsempend(2),
       capdefaults(5).


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