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.
|EINVAL||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 upon execve(2).