blob: d2c091db7eaeb8a17bf1f5434dbe8a9240871506 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
cat << EOF
/**
* ${atomic}_fetch_add_unless - add unless the number is already a given value
* @v: pointer of type ${atomic}_t
* @a: the amount to add to v...
* @u: ...unless v is equal to u.
*
* Atomically adds @a to @v, so long as @v was not already @u.
* Returns original value of @v
*/
static inline ${int}
${atomic}_fetch_add_unless(${atomic}_t *v, ${int} a, ${int} u)
{
${int} c = ${atomic}_read(v);
do {
if (unlikely(c == u))
break;
} while (!${atomic}_try_cmpxchg(v, &c, c + a));
return c;
}
EOF
|
