Named Semaphores

The functions sem_open(3R), sem_getvalue(3R), sem_close(3R), and sem_unlink(3R) are available to open, retrieve, close, and remove named semaphores. Using sem_open(), you can create a semaphore that has a name defined in the file system name space.

Named semaphores are like process shared semaphores, except that they are referenced with a pathname rather than a pshared value.

For more information about named semaphores, see sem_open(3R), sem_getvalue(3R), sem_close(3R), and sem_unlink(3R).