Function progress_sink_mutex_ensure

src/cli/progress_sink.c:39–48

The CLI may install the sink more than once in one process (notably tests), * so keep one process-lifetime mutex rather than destroying it at fini. */

/* The CLI may install the sink more than once in one process (notably tests),
 * so keep one process-lifetime mutex rather than destroying it at fini. */
static void progress_sink_mutex_ensure(void) {
    int expected = LOCK_UNINITIALIZED;
    if (atomic_compare_exchange_strong_explicit(&s_sink_mutex_state, &expected, LOCK_INITIALIZING,
                                                memory_order_acq_rel, memory_order_acquire)) {
        cbm_mutex_init(&s_sink_mutex);
        atomic_store_explicit(&s_sink_mutex_state, LOCK_READY, memory_order_release);
        return;
    }
    while (atomic_load_explicit(&s_sink_mutex_state, memory_order_acquire) != LOCK_READY) {}
}

bool cbm_cli_progress_enabled(bool explicitly_requested, bool stderr_is_tty) {
    return explicitly_requested || stderr_is_tty;