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GLib Reference Manual | |
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#include <glib.h>
GTimer;
GTimer* g_timer_new (void);
void g_timer_start (GTimer *timer);
void g_timer_stop (GTimer *timer);
void g_timer_continue (GTimer *timer);
gdouble g_timer_elapsed (GTimer *timer,
gulong *microseconds);
void g_timer_reset (GTimer *timer);
void g_timer_destroy (GTimer *timer);
GTimer records a start time, and counts microseconds elapsed since that time. This is done somewhat differently on different platforms, and can be tricky to get exactly right, so GTimer provides a portable/convenient interface.
GTimer uses a higher-quality clock when thread support is available.
Therefore, calling g_thread_init() while timers are running may lead to
unreliable results. It is best to call g_thread_init() before starting
any timers, if you are using threads at all.
GTimer* g_timer_new (void);
Creates a new timer, and starts timing (i.e. g_timer_start() is implicitly
called for you).
| Returns : | a new GTimer. |
void g_timer_start (GTimer *timer);
Marks a start time, so that future calls to g_timer_elapsed() will report the
time since g_timer_start() was called. g_timer_new() automatically marks the
start time, so no need to call g_timer_start() immediately after creating the
timer.
timer : |
a GTimer. |
void g_timer_stop (GTimer *timer);
Marks an end time, so calls to g_timer_elapsed() will return the difference
between this end time and the start time.
timer : |
a GTimer. |
void g_timer_continue (GTimer *timer);
Resumes a timer that has previously been stopped with g_timer_stop().
g_timer_stop() must be called before using this function.
timer : |
a GTimer. |
Since 2.4
gdouble g_timer_elapsed (GTimer *timer, gulong *microseconds);
If timer has been started but not stopped, obtains the time since the timer was
started. If timer has been stopped, obtains the elapsed time between the time
it was started and the time it was stopped. The return value is the number of
seconds elapsed, including any fractional part. The microseconds
out parameter is essentially useless.
Calling initialization functions, in particular g_thread_init(),
while a timer is running will cause invalid return values from this function.
void g_timer_reset (GTimer *timer);
This function is useless; it's fine to call g_timer_start() on an
already-started timer to reset the start time, so g_timer_reset() serves no
purpose.
timer : |
a GTimer. |