sem_close(3) Library Functions Manual sem_close(3)
NAME
sem_close - close a named semaphore
LIBRARY
POSIX threads library (libpthread, -lpthread)
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 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 at-
tributes(7).
┌────────────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├────────────────────────────────────────────┼───────────────┼─────────┤
│sem_close() │ Thread safety │ MT-Safe │
└────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
POSIX.1-2001, POSIX.1-2008.
NOTES
All open named semaphores are automatically closed on process termina-
tion, or upon execve(2).
SEE ALSO
sem_getvalue(3), sem_open(3), sem_post(3), sem_unlink(3), sem_wait(3),
sem_overview(7)
Linux man-pages 6.03 2022-12-15 sem_close(3)
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