sem_unlock

Name:sem_unlock

Proto:static inline void sem_unlock(struct sem_array *sma, int locknum)

Type:void

Parameter:

Type	Parameter	Name
struct sem_array *	sma
int	locknum

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If locknum == SEM_GLOBAL_LOCK Then

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merge_queues - unmerge queues, if possible.*@sma: semaphore array* The function unmerges the wait queues if complex_count is 0.* It must be called prior to dropping the global semaphore array lock.

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Try to leave the mode that disallows simple operations:* Caller must own sem_perm.lock.

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ipc_unlock_object( & permissions .. see ipc.h )

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Else

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sem = sems[locknum]

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spin_unlock( & spinlock for fine-grained semtimedop )

**Caller**
Name	Describe
newary	wary - Create a new semaphore set@ns: namespace@params: ptr to the structure that contains key, semflg and nsems* Called with sem_ids.rwsem held (as a writer)
freeary	Free a semaphore set. freeary() is called with sem_ids.rwsem locked* as a writer and the spinlock for this semaphore set hold. sem_ids.rwsem* remains locked on exit.
semctl_setval
semctl_main
semctl_down	This function handles some semctl commands which require the rwsem* to be held in write mode.* NOTE: no locks must be held, the rwsem is taken inside this function.
find_alloc_undo	d_alloc_undo - lookup (and if not present create) undo array@ns: namespace@semid: semaphore array id* The function looks up (and if not present creates) the undo structure.* The size of the undo structure depends on the size of the semaphore
do_semtimedop
exit_sem	add semadj values to semaphores, free undo structures

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