atomic_add_unless(9)
NAME
atomic_add_unless - add unless the number is already a given value
SYNOPSIS
int atomic_add_unless(atomic_t * v, int a, int u);
ARGUMENTS
- v
- pointer of type atomic_t
- a
- the amount to add to v...
- u
- ...unless v is equal to u.
DESCRIPTION
Atomically adds a to v, so long as v was not already u. Returns
non-zero if v was not u, and zero otherwise.