linux-stable/Documentation/litmus-tests/atomic/Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus

26 lines
357 B
Text
Raw Normal View History

C Atomic-RMW-ops-are-atomic-WRT-atomic_set
(*
* Result: Never
*
* Test that atomic_set() cannot break the atomicity of atomic RMWs.
* NOTE: This requires herd7 7.56 or later which supports "(void)expr".
*)
{
atomic_t v = ATOMIC_INIT(1);
}
P0(atomic_t *v)
{
(void)atomic_add_unless(v, 1, 0);
}
P1(atomic_t *v)
{
atomic_set(v, 0);
}
exists
(v=2)