#include <zinnia/refcount.h>
#include <stdatomic.h>

void refcount_init(struct refcount* rc) {
    atomic_store_explicit(&rc->count, 1, memory_order_relaxed);
}

void refcount_inc(struct refcount* rc) {
    atomic_fetch_add_explicit(&rc->count, 1, memory_order_relaxed);
}

bool refcount_dec(struct refcount* rc) {
    if (atomic_fetch_sub_explicit(&rc->count, 1, memory_order_release) != 1)
        return false;
    atomic_thread_fence(memory_order_acquire);
    return true;
}