GTimer计时器计算程序自启动运行的时间

GTimer为GLib的计时器，他可以计算自计时器开始到现在的时间差。下面的程序在程序运行开始创建计时器，通过时钟回调函数定期的输出程序运行的时间值。

#include

gboolean show_time(gpointer data);

int main(int argc,char** argv){

    GMainLoop* main_loop = NULL;

    guint i = 0;

    GTimer* timer = g_timer_new();

    

    main_loop = g_main_loop_new(NULL,FALSE);

    g_timeout_add_seconds(1,(GSourceFunc)show_time,timer);

    g_main_loop_run(main_loop);

    g_main_loop_quit(main_loop);

    return 0;

}

gboolean show_time(gpointer data){

    GTimer* timer = (GTimer*)data;

    gdouble seconds = g_timer_elapsed(timer,NULL);

    

    guint hours = seconds / 3600;

    guint minutes = (((guint)seconds) % 3600) / 60;

    guint secs = (((guint)seconds) % 3600) % 60;

    g_print("This program has been running for %02d:%02d:%02d\n",hours,minutes,secs);

    return TRUE;

}