tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus


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C IRIW+mbonceonces+OnceOnce

{}

P0(int *x)
{
	WRITE_ONCE(*x, 1);
}

P1(int *x, int *y)
{
	int r0;
	int r1;

	r0 = READ_ONCE(*x);
	smp_mb();
	r1 = READ_ONCE(*y);
}

P2(int *y)
{
	WRITE_ONCE(*y, 1);
}

P3(int *x, int *y)
{
	int r0;
	int r1;

	r0 = READ_ONCE(*y);
	smp_mb();
	r1 = READ_ONCE(*x);
}

exists (1:r0=1 /\ 1:r1=0 /\ 3:r0=1 /\ 3:r1=0)