1 // SPDX-License-Identifier: GPL-2.0
22 static struct comm_str *comm_str__get(struct comm_str *cs)  in comm_str__get()  argument
24 	if (cs && refcount_inc_not_zero(&cs->refcnt))  in comm_str__get()
25 		return cs;  in comm_str__get()
30 static void comm_str__put(struct comm_str *cs)  in comm_str__put()  argument
32 	if (cs && refcount_dec_and_test(&cs->refcnt)) {  in comm_str__put()
34 		rb_erase(&cs->rb_node, &comm_str_root);  in comm_str__put()
36 		zfree(&cs->str);  in comm_str__put()
37 		free(cs);  in comm_str__put()
43 	struct comm_str *cs;  in comm_str__alloc()  local
45 	cs = zalloc(sizeof(*cs));  in comm_str__alloc()
46 	if (!cs)  in comm_str__alloc()
49 	cs->str = strdup(str);  in comm_str__alloc()
50 	if (!cs->str) {  in comm_str__alloc()
51 		free(cs);  in comm_str__alloc()
55 	refcount_set(&cs->refcnt, 1);  in comm_str__alloc()
57 	return cs;  in comm_str__alloc()
63 	struct rb_node **p = &root->rb_node;  in __comm_str__findnew()
73 		 * If we race with comm_str__put, iter->refcnt is 0  in __comm_str__findnew()
77 		cmp = strcmp(str, iter->str);  in __comm_str__findnew()
81 		if (cmp < 0)  in __comm_str__findnew()
82 			p = &(*p)->rb_left;  in __comm_str__findnew()
84 			p = &(*p)->rb_right;  in __comm_str__findnew()
91 	rb_link_node(&new->rb_node, parent, p);  in __comm_str__findnew()
92 	rb_insert_color(&new->rb_node, root);  in __comm_str__findnew()
99 	struct comm_str *cs;  in comm_str__findnew()  local
102 	cs = __comm_str__findnew(str, root);  in comm_str__findnew()
105 	return cs;  in comm_str__findnew()
115 	comm->start = timestamp;  in comm__new()
116 	comm->exec = exec;  in comm__new()
118 	comm->comm_str = comm_str__findnew(str, &comm_str_root);  in comm__new()
119 	if (!comm->comm_str) {  in comm__new()
129 	struct comm_str *new, *old = comm->comm_str;  in comm__override()
133 		return -ENOMEM;  in comm__override()
136 	comm->comm_str = new;  in comm__override()
137 	comm->start = timestamp;  in comm__override()
139 		comm->exec = true;  in comm__override()
141 	return 0;  in comm__override()
146 	comm_str__put(comm->comm_str);  in comm__free()
152 	return comm->comm_str->str;  in comm__str()