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Close a named semaphore
#include <semaphore.h>
int sem_close( sem_t * sem );
- sem
- A pointer to a semaphore, as returned by
sem_open().
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The sem_close() function closes the named semaphore sem opened
by sem_open(), releasing any system resources associated with
the sem.
|
Don't mix named semaphore operations
(sem_open() and sem_close())
with unnamed semaphore operations
(sem_init()
and
sem_destroy())
on the same semaphore. |
- 0
- Success.
- -1
- An error occurred
(errno is set).
- EINVAL
- Invalid semaphore descriptor sem.
POSIX 1003.1 SEM
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
sem_init(),
sem_open(),
sem_unlink()
procnto*
in the Utilities Reference
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