sem_close3
Close a named semaphore
Usage
#include <semaphore.h>
int sem_close(sem_t *sem);
Library
POSIX threads library (libpthread, -lpthread)
Overview
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.
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.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| sem_close() | Thread safety | MT-Safe |
Notes
All open named semaphores are automatically closed on process termination, or upon execve(2).
Releases
11 releases since Debian 4.0 (Etch); the text changed 10 times.