sem_close - close a named semaphore
int sem_close(sem_t *sem);
Link with -pthread.
sem_close() closes the named semaphore referred to by sem,
allowing any resources that the system has allocated to the calling process
for this semaphore to be freed.
On success sem_close() returns 0; on error, -1 is returned, with
errno set to indicate the error.
- sem is not a valid semaphore.
For an explanation of the terms used in this section, see attributes(7).
All open named semaphores are automatically closed on process termination, or
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