30 lines
412 B
Plaintext
30 lines
412 B
Plaintext
|
C LB+poacquireonce+pooncerelease
|
||
|
|
|
||
|
|
(*
|
||
|
|
* Result: Never
|
||
|
|
*
|
||
|
|
* Does a release-acquire pair suffice for the load-buffering litmus
|
||
|
|
* test, where each process reads from one of two variables then writes
|
||
|
|
* to the other?
|
||
|
|
*)
|
||
|
|
|
||
|
|
{}
|
||
|
|
|
||
|
|
P0(int *x, int *y)
|
||
|
|
{
|
||
|
|
int r0;
|
||
|
|
|
||
|
|
r0 = READ_ONCE(*x);
|
||
|
|
smp_store_release(y, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
P1(int *x, int *y)
|
||
|
|
{
|
||
|
|
int r0;
|
||
|
|
|
||
|
|
r0 = smp_load_acquire(y);
|
||
|
|
WRITE_ONCE(*x, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
exists (0:r0=1 /\ 1:r0=1)
|