blob: 0e0b9aef151530a622cf97dbf6c4b88ee56cde16 [file] [log] [blame]
cat << EOF
* ${arch}${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 __always_inline ${int}
${arch}${atomic}_fetch_add_unless(${atomic}_t *v, ${int} a, ${int} u)
${int} c = ${arch}${atomic}_read(v);
do {
if (unlikely(c == u))
} while (!${arch}${atomic}_try_cmpxchg(v, &c, c + a));
return c;