size_t b = atomic_load_explicit(&q->bottom, memory_order_relaxed) - 1;
Array *a = (Array *) atomic_load_explicit(&q->array, memory_order_relaxed);
atomic_store_explicit(&q->bottom, b, memory_order_relaxed);
- atomic_thread_fence(memory_order_relaxed); // sc
- size_t t = atomic_load_explicit(&q->top, memory_order_relaxed);
+ atomic_thread_fence(memory_order_seq_cst); // sc
+ size_t t = atomic_load_explicit(&q->top, memory_order_release);
int x;
if (t <= b) {
/* Non-empty queue. */
for(i=top; i < bottom; i++) {
atomic_store_explicit(&new_a->buffer[i % new_size], atomic_load_explicit(&a->buffer[i % size], memory_order_relaxed), memory_order_relaxed);
}
- atomic_store_explicit(&q->array, new_a, memory_order_relaxed); // release
+ atomic_store_explicit(&q->array, new_a, memory_order_release); // release
printf("resize\n");
}
void push(Deque *q, int x) {
size_t b = atomic_load_explicit(&q->bottom, memory_order_relaxed);
- size_t t = atomic_load_explicit(&q->top, memory_order_relaxed); // acquire
+ size_t t = atomic_load_explicit(&q->top, memory_order_acquire); // acquire
Array *a = (Array *) atomic_load_explicit(&q->array, memory_order_relaxed);
if (b - t > atomic_load_explicit(&a->size, memory_order_relaxed) - 1) /* Full queue. */ {
resize(q);
a = (Array *) atomic_load_explicit(&q->array, memory_order_relaxed);
}
atomic_store_explicit(&a->buffer[b % atomic_load_explicit(&a->size, memory_order_relaxed)], x, memory_order_relaxed);
- atomic_thread_fence(memory_order_relaxed); // release
+ atomic_thread_fence(memory_order_release); // release
atomic_store_explicit(&q->bottom, b + 1, memory_order_relaxed);
}
int steal(Deque *q) {
size_t t = atomic_load_explicit(&q->top, memory_order_relaxed); // acquire
- atomic_thread_fence(memory_order_relaxed); // sc
- size_t b = atomic_load_explicit(&q->bottom, memory_order_relaxed); // acquire
+ atomic_thread_fence(memory_order_seq_cst); // sc
+ size_t b = atomic_load_explicit(&q->bottom, memory_order_acquire); // acquire
int x = EMPTY;
if (t < b) {
/* Non-empty queue. */
- Array *a = (Array *) atomic_load_explicit(&q->array, memory_order_relaxed); // acquire
+ Array *a = (Array *) atomic_load_explicit(&q->array, memory_order_acquire); // acquire
x = atomic_load_explicit(&a->buffer[t % atomic_load_explicit(&a->size, memory_order_relaxed)], memory_order_relaxed);
if (!atomic_compare_exchange_strong_explicit(&q->top, &t, t + 1,
- memory_order_release, memory_order_relaxed)) // sc
+ memory_order_seq_cst, memory_order_relaxed)) // sc
/* Failed race. */
return ABORT;
}