95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
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/*
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* Timer
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*
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* Author:
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* Gonzalo Paniagua Javier (gonzalo@novell.com
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*
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* (C) 2006 Novell, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <glib.h>
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#include <windows.h>
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struct _GTimer {
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guint64 start;
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guint64 stop;
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};
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GTimer *g_timer_new (void)
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{
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GTimer *timer;
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timer = g_new0 (GTimer, 1);
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g_timer_start (timer);
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return timer;
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}
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void
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g_timer_destroy (GTimer *timer)
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{
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g_return_if_fail (timer != NULL);
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g_free (timer);
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}
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void
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g_timer_start (GTimer *timer)
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{
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g_return_if_fail (timer != NULL);
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QueryPerformanceCounter ((LARGE_INTEGER*)&timer->start);
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}
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void
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g_timer_stop (GTimer *timer)
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{
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g_return_if_fail (timer != NULL);
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QueryPerformanceCounter ((LARGE_INTEGER*)&timer->stop);
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}
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gdouble
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g_timer_elapsed (GTimer *timer, gulong *microseconds)
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{
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static guint64 freq = 0;
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guint64 delta, stop;
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if (freq == 0) {
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if (!QueryPerformanceFrequency ((LARGE_INTEGER *)&freq))
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freq = 1;
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}
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if (timer->stop == 0) {
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QueryPerformanceCounter ((LARGE_INTEGER*)&stop);
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}
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else {
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stop = timer->stop;
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}
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delta = stop - timer->start;
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if (microseconds)
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*microseconds = (gulong) (delta * (1000000.0 / freq));
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return (gdouble) delta / (gdouble) freq;
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}
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