| C cmpxchg-fail-ordered-1 | |
| (* | |
| * Result: Never | |
| * | |
| * Demonstrate that a failing cmpxchg() operation will act as a full | |
| * barrier when followed by smp_mb__after_atomic(). | |
| *) | |
| {} | |
| P0(int *x, int *y, int *z) | |
| { | |
| int r0; | |
| int r1; | |
| WRITE_ONCE(*x, 1); | |
| r1 = cmpxchg(z, 1, 0); | |
| smp_mb__after_atomic(); | |
| r0 = READ_ONCE(*y); | |
| } | |
| P1(int *x, int *y, int *z) | |
| { | |
| int r0; | |
| int r1; | |
| WRITE_ONCE(*y, 1); | |
| r1 = cmpxchg(z, 1, 0); | |
| smp_mb__after_atomic(); | |
| r0 = READ_ONCE(*x); | |
| } | |
| locations[0:r1;1:r1] | |
| exists (0:r0=0 /\ 1:r0=0) |