mirror of https://gitee.com/openkylin/linux.git
30 lines
423 B
Plaintext
30 lines
423 B
Plaintext
C SB+poonceonces
|
|
|
|
(*
|
|
* Result: Sometimes
|
|
*
|
|
* This litmus test demonstrates that at least some ordering is required
|
|
* to order the store-buffering pattern, where each process writes to the
|
|
* variable that the preceding process reads.
|
|
*)
|
|
|
|
{}
|
|
|
|
P0(int *x, int *y)
|
|
{
|
|
int r0;
|
|
|
|
WRITE_ONCE(*x, 1);
|
|
r0 = READ_ONCE(*y);
|
|
}
|
|
|
|
P1(int *x, int *y)
|
|
{
|
|
int r0;
|
|
|
|
WRITE_ONCE(*y, 1);
|
|
r0 = READ_ONCE(*x);
|
|
}
|
|
|
|
exists (0:r0=0 /\ 1:r0=0)
|