#include <gio/gio.h>
#include <stdlib.h>
#include <string.h>

gpointer current_data = NULL;
GMutex data_mutex;
GCond data_cond;

void push_data(gpointer data) {
    g_mutex_lock(&data_mutex);
    current_data = data;
    g_cond_signal(&data_cond);
    g_mutex_unlock(&data_mutex);
}

gpointer pop_data_timed(void) {
    gint64 end_time;
    gpointer data;

    g_print("start timer:\t%ld\n", g_get_monotonic_time());

    g_mutex_lock(&data_mutex);

    end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
    g_print("wait until:\t%ld\n", end_time);
    while (!current_data)
        if (!g_cond_wait_until(&data_cond, &data_mutex, end_time)) {
            g_print("timeout:\t%ld\n", g_get_monotonic_time());
            // timeout has passed.
            g_mutex_unlock(&data_mutex);
            return NULL;
        }

    // there is data for us
    data         = current_data;
    current_data = NULL;

    g_mutex_unlock(&data_mutex);

    return data;
}

int main(int argc, char **argv) {
    GApplication *app;
    int status;

    app = g_application_new("org.gtk.TestApplication", G_APPLICATION_HANDLES_COMMAND_LINE);
    g_signal_connect(app, "command-line", G_CALLBACK(pop_data_timed), NULL);
    g_application_set_inactivity_timeout(app, 10000);

    status = g_application_run(app, argc, argv);

    g_object_unref(app);

    return status;
}