| C MP+pooncerelease+poacquireonce | |
| (* | |
| * Result: Never | |
| * | |
| * This litmus test demonstrates that smp_store_release() and | |
| * smp_load_acquire() provide sufficient ordering for the message-passing | |
| * pattern. | |
| *) | |
| { | |
| int buf; | |
| int flag; | |
| } | |
| P0(int *buf, int *flag) // Producer | |
| { | |
| WRITE_ONCE(*buf, 1); | |
| smp_store_release(flag, 1); | |
| } | |
| P1(int *buf, int *flag) // Consumer | |
| { | |
| int r0; | |
| int r1; | |
| r0 = smp_load_acquire(flag); | |
| r1 = READ_ONCE(*buf); | |
| } | |
| exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *) |