1 C Atomic-RMW-ops-are-atomic-WRT-atomic_set 1 C Atomic-RMW-ops-are-atomic-WRT-atomic_set
2 2
3 (* 3 (*
4 * Result: Never 4 * Result: Never
5 * 5 *
6 * Test that atomic_set() cannot break the ato 6 * Test that atomic_set() cannot break the atomicity of atomic RMWs.
7 * NOTE: This requires herd7 7.56 or later whi 7 * NOTE: This requires herd7 7.56 or later which supports "(void)expr".
8 *) 8 *)
9 9
10 { 10 {
11 atomic_t v = ATOMIC_INIT(1); 11 atomic_t v = ATOMIC_INIT(1);
12 } 12 }
13 13
14 P0(atomic_t *v) 14 P0(atomic_t *v)
15 { 15 {
16 (void)atomic_add_unless(v, 1, 0); 16 (void)atomic_add_unless(v, 1, 0);
17 } 17 }
18 18
19 P1(atomic_t *v) 19 P1(atomic_t *v)
20 { 20 {
21 atomic_set(v, 0); 21 atomic_set(v, 0);
22 } 22 }
23 23
24 exists 24 exists
25 (v=2) 25 (v=2)
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