aom_ports/aom_timer.h

   1 /*
   2  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
   3  *
   4  * This source code is subject to the terms of the BSD 2 Clause License and
   5  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   6  * was not distributed with this source code in the LICENSE file, you can
   7  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   8  * Media Patent License 1.0 was not distributed with this source code in the
   9  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  10  */
  11
  12 #ifndef AOM_PORTS_AOM_TIMER_H_
  13 #define AOM_PORTS_AOM_TIMER_H_
  14
  15 #include "./aom_config.h"
  16
  17 #include "aom/aom_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 struct aom_usec_timer {
  50 #if defined(_WIN32)
  51   LARGE_INTEGER begin, end;
  52 #else
  53   struct timeval begin, end;
  54 #endif
  55 };
  56
  57 static INLINE void aom_usec_timer_start(struct aom_usec_timer *t) {
  58 #if defined(_WIN32)
  59   QueryPerformanceCounter(&t->begin);
  60 #else
  61   gettimeofday(&t->begin, NULL);
  62 #endif
  63 }
  64
  65 static INLINE void aom_usec_timer_mark(struct aom_usec_timer *t) {
  66 #if defined(_WIN32)
  67   QueryPerformanceCounter(&t->end);
  68 #else
  69   gettimeofday(&t->end, NULL);
  70 #endif
  71 }
  72
  73 static INLINE int64_t aom_usec_timer_elapsed(struct aom_usec_timer *t) {
  74 #if defined(_WIN32)
  75   LARGE_INTEGER freq, diff;
  76
  77   diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
  78
  79   QueryPerformanceFrequency(&freq);
  80   return diff.QuadPart * 1000000 / freq.QuadPart;
  81 #else
  82   struct timeval diff;
  83
  84   timersub(&t->end, &t->begin, &diff);
  85   return ((int64_t)diff.tv_sec) * 1000000 + diff.tv_usec;
  86 #endif
  87 }
  88
  89 #else /* CONFIG_OS_SUPPORT = 0*/
  90
  91 /* Empty timer functions if CONFIG_OS_SUPPORT = 0 */
  92 #ifndef timersub
  93 #define timersub(a, b, result)
  94 #endif
  95
  96 struct aom_usec_timer {
  97   void *dummy;
  98 };
  99
 100 static INLINE void aom_usec_timer_start(struct aom_usec_timer *t) { (void)t; }
 101
 102 static INLINE void aom_usec_timer_mark(struct aom_usec_timer *t) { (void)t; }
 103
 104 static INLINE int aom_usec_timer_elapsed(struct aom_usec_timer *t) {
 105   (void)t;
 106   return 0;
 107 }
 108
 109 #endif /* CONFIG_OS_SUPPORT */
 110
 111 #endif  // AOM_PORTS_AOM_TIMER_H_