vpx_ports/vpx_timer.h

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 #ifndef VPX_PORTS_VPX_TIMER_H_
  13 #define VPX_PORTS_VPX_TIMER_H_
  14
  15 #include "./vpx_config.h"
  16
  17 #include "vpx/vpx_integer.h"
  18
  19 #if CONFIG_OS_SUPPORT
  20
  21 #if defined(_WIN32)
  22 /*
  23  * Win32 specific includes
  24  */
  25 #ifndef WIN32_LEAN_AND_MEAN
  26 #define WIN32_LEAN_AND_MEAN
  27 #endif
  28 #include <windows.h>
  29 #else
  30 /*
  31  * POSIX specific includes
  32  */
  33 #include <sys/time.h>
  34
  35 /* timersub is not provided by msys at this time. */
  36 #ifndef timersub
  37 #define timersub(a, b, result) \
  38   do { \
  39     (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
  40     (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
  41     if ((result)->tv_usec < 0) { \
  42       --(result)->tv_sec; \
  43       (result)->tv_usec += 1000000; \
  44     } \
  45   } while (0)
  46 #endif
  47 #endif
  48
  49
  50 struct vpx_usec_timer {
  51 #if defined(_WIN32)
  52   LARGE_INTEGER  begin, end;
  53 #else
  54   struct timeval begin, end;
  55 #endif
  56 };
  57
  58
  59 static INLINE void
  60 vpx_usec_timer_start(struct vpx_usec_timer *t) {
  61 #if defined(_WIN32)
  62   QueryPerformanceCounter(&t->begin);
  63 #else
  64   gettimeofday(&t->begin, NULL);
  65 #endif
  66 }
  67
  68
  69 static INLINE void
  70 vpx_usec_timer_mark(struct vpx_usec_timer *t) {
  71 #if defined(_WIN32)
  72   QueryPerformanceCounter(&t->end);
  73 #else
  74   gettimeofday(&t->end, NULL);
  75 #endif
  76 }
  77
  78
  79 static INLINE int64_t
  80 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
  81 #if defined(_WIN32)
  82   LARGE_INTEGER freq, diff;
  83
  84   diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
  85
  86   QueryPerformanceFrequency(&freq);
  87   return diff.QuadPart * 1000000 / freq.QuadPart;
  88 #else
  89   struct timeval diff;
  90
  91   timersub(&t->end, &t->begin, &diff);
  92   return diff.tv_sec * 1000000 + diff.tv_usec;
  93 #endif
  94 }
  95
  96 #else /* CONFIG_OS_SUPPORT = 0*/
  97
  98 /* Empty timer functions if CONFIG_OS_SUPPORT = 0 */
  99 #ifndef timersub
 100 #define timersub(a, b, result)
 101 #endif
 102
 103 struct vpx_usec_timer {
 104   void *dummy;
 105 };
 106
 107 static INLINE void
 108 vpx_usec_timer_start(struct vpx_usec_timer *t) { }
 109
 110 static INLINE void
 111 vpx_usec_timer_mark(struct vpx_usec_timer *t) { }
 112
 113 static INLINE int
 114 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
 115   return 0;
 116 }
 117
 118 #endif /* CONFIG_OS_SUPPORT */
 119
 120 #endif  // VPX_PORTS_VPX_TIMER_H_