sem_close man page
sem_close — close a named semaphore
#include <semaphore.h> 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 upon execve(2).
sem_getvalue(3), sem_open(3), sem_post(3), sem_unlink(3), sem_wait(3), sem_overview(7)
This page is part of release 4.10 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.