1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
| C CoRR+poonceonce+Once
|
| (*
| * Result: Never
| *
| * Test of read-read coherence, that is, whether or not two successive
| * reads from the same variable are ordered.
| *)
|
| {}
|
| P0(int *x)
| {
| WRITE_ONCE(*x, 1);
| }
|
| P1(int *x)
| {
| int r0;
| int r1;
|
| r0 = READ_ONCE(*x);
| r1 = READ_ONCE(*x);
| }
|
| exists (1:r0=1 /\ 1:r1=0)
|
|