atomic.h

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#pragma once
#include "quickio.h"

static inline gboolean atomic_inc_not_zero(guint *to)
{
        __sync_synchronize();
        guint val = *to;

        while (TRUE) {
                guint old;

                if (G_UNLIKELY(val == 0)) {
                        break;
                }

                old = __sync_val_compare_and_swap(to, val, val + 1);
                if (G_LIKELY(old == val)) {
                        break;
                }

                val = old;
        }

        return val > 0;
}