Function platform_time_first_call

tests/test_platform.c:134–142

} platform_time_worker_t;

static void *platform_time_first_call(void *opaque) {
    platform_time_worker_t *worker = opaque;
    (void)atomic_fetch_add_explicit(worker->ready, 1, memory_order_acq_rel);
    while (!atomic_load_explicit(worker->go, memory_order_acquire)) {
        atomic_signal_fence(memory_order_seq_cst);
    }
    worker->value = cbm_now_ns();
    return NULL;
}

TEST(platform_now_ns_concurrent_first_call) {
    cbm_thread_t threads[PLATFORM_TIME_THREADS];