GLIBTOP_UPTIME_UPTIME

#define GLIBTOP_UPTIME_UPTIME		0

GLIBTOP_UPTIME_IDLETIME

#define GLIBTOP_UPTIME_IDLETIME		1

GLIBTOP_UPTIME_BOOT_TIME

#define GLIBTOP_UPTIME_BOOT_TIME    2

GLIBTOP_MAX_UPTIME

#define GLIBTOP_MAX_UPTIME		3

glibtop_uptime

typedef struct {
	guint64 flags;
	double uptime;		/* GLIBTOP_UPTIME_UPTIME	*/
	double idletime;	/* GLIBTOP_UPTIME_IDLETIME	*/
	guint64 boot_time;
} glibtop_uptime;

glibtop_get_uptime ()

void                glibtop_get_uptime                  (glibtop_uptime *buf);

When porting LibGTop to a new system, you only need to implement uptime and idletime if there's a faster or better way to obtain them as using function(glibtop_cpu) for it. Look at sysdeps/freebsd/uptime.c for an example on how to obtain them using function(glibtop_cpu).

glibtop_get_uptime_r

#define             glibtop_get_uptime_r

glibtop_get_uptime_l ()

void                glibtop_get_uptime_l                (glibtop *server,
                                                         glibtop_uptime *buf);

glibtop_get_uptime_p ()

void                glibtop_get_uptime_p                (glibtop *server,
                                                         glibtop_uptime *buf);

glibtop_get_uptime_s ()

void                glibtop_get_uptime_s                (glibtop *server,
                                                         glibtop_uptime *buf);