cairo/perf/cairo-perf-win32.c

   1 /*
   2  * Copyright © 2006 Mozilla Corporation
   3  * Copyright © 2006 Red Hat, Inc.
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software
   6  * and its documentation for any purpose is hereby granted without
   7  * fee, provided that the above copyright notice appear in all copies
   8  * and that both that copyright notice and this permission notice
   9  * appear in supporting documentation, and that the name of
  10  * the authors not be used in advertising or publicity pertaining to
  11  * distribution of the software without specific, written prior
  12  * permission. The authors make no representations about the
  13  * suitability of this software for any purpose.  It is provided "as
  14  * is" without express or implied warranty.
  15  *
  16  * THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  17  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  18  * FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL,
  19  * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  20  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  21  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  22  * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  23  *
  24  * Authors: Vladimir Vukicevic <vladimir@pobox.com>
  25  *          Carl Worth <cworth@cworth.org>
  26  */
  27
  28 #define USE_WINAPI
  29
  30 #define WIN32_LEAN_AND_MEAN
  31 #include <windows.h>
  32
  33 #include "cairo-perf.h"
  34
  35 /* timers */
  36
  37 typedef struct _cairo_perf_timer
  38 {
  39     LARGE_INTEGER start;
  40     LARGE_INTEGER stop;
  41 } cairo_perf_timer_t;
  42
  43 static cairo_perf_timer_t timer;
  44
  45 static cairo_perf_timer_synchronize_t cairo_perf_timer_synchronize = NULL;
  46 static void *cairo_perf_timer_synchronize_closure = NULL;
  47 void
  48 cairo_perf_timer_set_synchronize (cairo_perf_timer_synchronize_t         synchronize,
  49                                   void                                  *closure)
  50 {
  51     cairo_perf_timer_synchronize = synchronize;
  52     cairo_perf_timer_synchronize_closure = closure;
  53 }
  54
  55 void
  56 cairo_perf_timer_start (void) {
  57     if (cairo_perf_timer_synchronize)
  58         cairo_perf_timer_synchronize (cairo_perf_timer_synchronize_closure);
  59     QueryPerformanceCounter(&timer.start);
  60 }
  61
  62 void
  63 cairo_perf_timer_stop (void) {
  64     if (cairo_perf_timer_synchronize)
  65         cairo_perf_timer_synchronize (cairo_perf_timer_synchronize_closure);
  66     QueryPerformanceCounter(&timer.stop);
  67 }
  68
  69 cairo_perf_ticks_t
  70 cairo_perf_timer_elapsed (void) {
  71     return (timer.stop.QuadPart - timer.start.QuadPart);
  72 }
  73
  74 cairo_perf_ticks_t
  75 cairo_perf_ticks_per_second (void) {
  76     LARGE_INTEGER freq;
  77
  78     QueryPerformanceFrequency(&freq);
  79
  80     return freq.QuadPart;
  81 }
  82
  83
  84 /* yield */
  85
  86 void
  87 cairo_perf_yield (void) {
  88     SleepEx(0, TRUE);
  89 }