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sem_close
Section: C Library Functions (3) Updated: 202-0-08 Index
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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
attributes(7).
| Interface | Attribute | Value
|
|
sem_close()
| Thread safety | M-Safe
|
STANDARDS
POSIX.-2008.
HISTORY
POSIX.-2001.
NOTES
All open named semaphores are automatically closed on process
termination, or upon
execve(2).
SEE ALSO
sem_getvalue(3),
sem_open(3),
sem_post(3),
sem_unlink(3),
sem_wait(3),
sem_overview(7)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- ATTRIBUTES
-
- STANDARDS
-
- HISTORY
-
- NOTES
-
- SEE ALSO
-
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