[linux-block.git] / tools / memory-model / litmus-tests / WRC+poonceonces+Once.litmus

C WRC+poonceonces+Once

(*
 * Result: Sometimes
 *
 * This litmus test is an extension of the message-passing pattern,
 * where the first write is moved to a separate process.  Note that this
 * test has no ordering at all.
 *)

{}

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

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

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

P2(int *x, int *y)
{
	int r0;
	int r1;

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

exists (1:r0=1 /\ 2:r0=1 /\ 2:r1=0)
Commit	Line	Data
1c27b644 PM	1	C WRC+poonceonces+Once
1c27b644 PM	2
8f32543b PM	3	(*
	4	* Result: Sometimes
	5	*
	6	* This litmus test is an extension of the message-passing pattern,
	7	* where the first write is moved to a separate process. Note that this
	8	* test has no ordering at all.
	9	*)
	10
5c587f9b	11	{}
1c27b644 PM	12
	13	P0(int *x)
	14	{
	15	WRITE_ONCE(*x, 1);
	16	}
	17
	18	P1(int x, int y)
	19	{
	20	int r0;
	21
	22	r0 = READ_ONCE(*x);
	23	WRITE_ONCE(*y, 1);
	24	}
	25
	26	P2(int x, int y)
	27	{
	28	int r0;
	29	int r1;
	30
	31	r0 = READ_ONCE(*y);
	32	r1 = READ_ONCE(*x);
	33	}
	34
	35	exists (1:r0=1 /\ 2:r0=1 /\ 2:r1=0)