Lines Matching +full:in +full:- +full:and +full:- +full:around

1 /* SPDX-License-Identifier: GPL-2.0-only */
3  * kref.h - library routines for handling generic reference counted objects
5  * Copyright (C) 2004 Greg Kroah-Hartman <[email protected]>
9  * Copyright (C) 2002-2003 Patrick Mochel <[email protected]>
10  * Copyright (C) 2002-2003 Open Source Development Labs
26  * kref_init - initialize object.
27  * @kref: object in question.
31 	refcount_set(&kref->refcount, 1);  in kref_init()
36 	return refcount_read(&kref->refcount);  in kref_read()
40  * kref_get - increment refcount for object.
45 	refcount_inc(&kref->refcount);  in kref_get()
49  * kref_put - Decrement refcount for object
54  * Decrement the refcount, and if 0, call @release.  The caller may not
64 	if (refcount_dec_and_test(&kref->refcount)) {  in kref_put()
72  * kref_put_mutex - Decrement refcount for object
85 	if (refcount_dec_and_mutex_lock(&kref->refcount, mutex)) {  in kref_put_mutex()
93  * kref_put_lock - Decrement refcount for object
106 	if (refcount_dec_and_lock(&kref->refcount, lock)) {  in kref_put_lock()
114  * kref_get_unless_zero - Increment refcount for object unless it is zero.
117  * This function is intended to simplify locking around refcounting for
118  * objects that can be looked up from a lookup structure, and which are
119  * removed from that lookup structure in the object destructor.
120  * Operations on such objects require at least a read lock around
121  * lookup + kref_get, and a write lock around kref_put + remove from lookup
124  * locking in the kref_put path can be deferred to the actual removal from
125  * the lookup structure and RCU lookups become trivial.
127  * Return: non-zero if the increment succeeded. Otherwise return 0.
131 	return refcount_inc_not_zero(&kref->refcount);  in kref_get_unless_zero()