tools/memory-model/litmus-tests/CoRR+poonceonce+Once.litmus


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
27
28

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.
 *)

{
	int x;
}

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)