*/
int take(Deque *q) {
size_t b = atomic_load_explicit(&q->bottom, memory_order_relaxed) - 1;
+ /**
+ @Begin
+ @Commit_point_define_check: true
+ @Label: Take_Read_Bottom
+ @End
+ */
Array *a = (Array *) atomic_load_explicit(&q->array, memory_order_relaxed);
+ /**
+ //@Begin
+ @Commit_point_define_check: true
+ @Label: Take_Read_Array
+ @End
+ */
atomic_store_explicit(&q->bottom, b, memory_order_relaxed);
/**** detected correctness ****/
atomic_thread_fence(memory_order_seq_cst);
size_t t = atomic_load_explicit(&q->top, memory_order_relaxed);
/**
- @Begin
- @Commit_point_define_check: t > b
- @Label: Take_Point1
+ //@Begin
+ @Commit_point_define_check: t != b
+ @Label: Take_Read_Top
@End
*/
int x;
int size = atomic_load_explicit(&a->size,memory_order_relaxed);
x = atomic_load_explicit(&a->buffer[b % size], memory_order_relaxed);
/**
- @Begin
+ //@Begin
@Commit_point_define_check: t != b
- @Label: Take_Point2
+ @Label: Take_Read_Buffer
@End
*/
if (t == b) {
1, memory_order_seq_cst, memory_order_relaxed);
/**
@Begin
- @Commit_point_define_check: true
- @Label: Take_Point3
+ @Commit_point_define_check: succ
+ @Label: Take_CAS_Top
+ @End
+ */
+
+ /**
+ @Begin
+ @Additional_ordering_point_define_check: !succ
+ @Label: Take_Additional_Point
@End
*/
if (!succ) {
//Bug in paper...should have next line...
a = (Array *) atomic_load_explicit(&q->array, memory_order_relaxed);
/**
- @Begin
+ //@Begin
@Commit_point_define_check: true
@Label: Push_Read_Array
@End
atomic_store_explicit(&a->buffer[b % size], x, memory_order_relaxed);
/**
- @Begin
+ //@Begin
@Commit_point_define_check: true
@Label: Push_Update_Buffer
@End
int steal(Deque *q) {
//FIXME: weaken the following acquire causes no spec problem
size_t t = atomic_load_explicit(&q->top, memory_order_acquire);
+ /**
+ //@Begin
+ @Potential_commit_point_define: true
+ @Label: Steal_Potential_Read_Tail
+ @End
+ */
//FIXME: remove the fence causes no error and fewer executions..
atomic_thread_fence(memory_order_seq_cst);
/**** detected UL ****/
size_t b = atomic_load_explicit(&q->bottom, memory_order_acquire);
/**
@Begin
- @Commit_point_define_check: t >= b
- @Label: Steal_Point1
+ @Commit_point_define_check: true
+ @Label: Steal_Read_Bottom
+ @End
+ */
+
+ /**
+ //@Begin
+ @Commit_point_define: t >= b
+ @Potential_commit_point_label: Steal_Potential_Read_Tail
+ @Label: Steal_Read_Tail
@End
*/
int x = EMPTY;
/* Non-empty queue. */
/**** detected UL ****/
Array *a = (Array *) atomic_load_explicit(&q->array, memory_order_acquire);
+ /**
+ //@Begin
+ @Commit_point_define_check: true
+ @Label: Steal_Read_Array
+ @End
+ */
int size = atomic_load_explicit(&a->size, memory_order_relaxed);
x = atomic_load_explicit(&a->buffer[t % size], memory_order_relaxed);
/**
- @Begin
+ //@Begin
@Potential_commit_point_define: true
- @Label: Potential_Steal
+ @Label: Steal_Potential_Read_Buffer
@End
*/
/**** detected correctness failure ****/
memory_order_seq_cst, memory_order_relaxed);
/**
@Begin
- @Commit_point_define_check: !succ
- @Label: Steal_Point2
+ @Commit_point_define_check: succ
+ @Label: Steal_CAS_Top
@End
*/
/**
@Begin
+ @Additional_ordering_point_define_check: !succ
+ @Label: Steal_Additional_Point
+ @End
+ */
+
+ /**
+ //@Begin
@Commit_point_define: succ
- @Potential_commit_point_label: Potential_Steal
- @Label: Steal_Point3
+ @Potential_commit_point_label: Steal_Potential_Read_Buffer
+ @Label: Steal_Read_Buffer
@End
*/
if (!succ) {