NAME

sem_close - close a named semaphore

SYNOPSIS

#include <semaphore.h>

int sem_close(sem_t *sem);

DESCRIPTION

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.

NOTES

All open named semaphores are automatically closed on process termination, or upon execve(2).

RETURN VALUE

On success sem_close() returns 0; on error, -1 is returned, with errno set to indicate the error.

ERRORS

EINVAL

sem is not a valid semaphore.

CONFORMING TO

POSIX.1-2001.

SEE ALSO

sem_getvalue(3), sem_open(3), sem_post(3), sem_unlink(3), sem_wait(3), sem_overview(7)