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


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C CoWR+poonceonce+Once

(*
 * Result: Never
 *
 * Test of write-read coherence, that is, whether or not a write to a
 * given variable and a later read from that same variable are ordered.
 *)

{
	int x;
}

P0(int *x)
{
	int r0;

	WRITE_ONCE(*x, 1);
	r0 = READ_ONCE(*x);
}

P1(int *x)
{
	WRITE_ONCE(*x, 2);
}

exists (x=1 /\ 0:r0=2)