sem_destroy(3C) Standard C Library Functions sem_destroy(3C)NAME
sem_destroy - destroy an unnamed semaphore
SYNOPSIS
#include <semaphore.h>
int sem_destroy(sem_t *sem);
DESCRIPTION
The sem_destroy() function is used to destroy the unnamed semaphore indicated by sem. Only a semaphore that was created using sem_init(3C)
may be destroyed using sem_destroy(); the effect of calling sem_destroy() with a named semaphore is undefined. The effect of subsequent use
of the semaphore sem is undefined until sem is re-initialized by another call to sem_init(3C).
It is safe to destroy an initialised semaphore upon which no threads are currently blocked. The effect of destroying a semaphore upon which
other threads are currently blocked is undefined.
RETURN VALUES
If successful, sem_destroy() returns 0, otherwise it returns -1 and sets errno to indicate the error.
ERRORS
The sem_destroy() function will fail if:
EINVAL The sem argument is not a valid semaphore.
The sem_destroy() function may fail if:
EBUSY There are currently processes (or LWPs or threads) blocked on the semaphore.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
|ATTRIBUTE TYPE |ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
|Standard |See standards(5). |
+-----------------------------+-----------------------------+
SEE ALSO sem_init(3C), sem_open(3C), attributes(5), standards(5)SunOS 5.11 5 Feb 2008 sem_destroy(3C)
Check Out this Related Man Page
SEM_DESTROY(P) POSIX Programmer's Manual SEM_DESTROY(P)
NAME
sem_destroy - destroy an unnamed semaphore (REALTIME)
SYNOPSIS
#include <semaphore.h>
int sem_destroy(sem_t *sem);
DESCRIPTION
The sem_destroy() function shall destroy the unnamed semaphore indicated by sem. Only a semaphore that was created using sem_init() may be
destroyed using sem_destroy(); the effect of calling sem_destroy() with a named semaphore is undefined. The effect of subsequent use of the
semaphore sem is undefined until sem is reinitialized by another call to sem_init().
It is safe to destroy an initialized semaphore upon which no threads are currently blocked. The effect of destroying a semaphore upon which
other threads are currently blocked is undefined.
RETURN VALUE
Upon successful completion, a value of zero shall be returned. Otherwise, a value of -1 shall be returned and errno set to indicate the
error.
ERRORS
The sem_destroy() function shall fail if:
EINVAL The sem argument is not a valid semaphore.
The sem_destroy() function may fail if:
EBUSY There are currently processes blocked on the semaphore.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
The sem_destroy() function is part of the Semaphores option and need not be available on all implementations.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
semctl() , semget() , semop() , sem_init() , sem_open() , the Base Definitions volume of IEEE Std 1003.1-2001, <semaphore.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE /The Open Group 2003 SEM_DESTROY(P)