Home | History | Annotate | Download | only in vpx_ports
      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_TIMER_H
     13 #define VPX_TIMER_H
     14 #include "vpx/vpx_integer.h"
     15 
     16 #if CONFIG_OS_SUPPORT
     17 
     18 #if defined(_WIN32)
     19 /*
     20  * Win32 specific includes
     21  */
     22 #ifndef WIN32_LEAN_AND_MEAN
     23 #define WIN32_LEAN_AND_MEAN
     24 #endif
     25 #include <windows.h>
     26 #else
     27 /*
     28  * POSIX specific includes
     29  */
     30 #include <sys/time.h>
     31 
     32 /* timersub is not provided by msys at this time. */
     33 #ifndef timersub
     34 #define timersub(a, b, result) \
     35   do { \
     36     (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
     37     (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
     38     if ((result)->tv_usec < 0) { \
     39       --(result)->tv_sec; \
     40       (result)->tv_usec += 1000000; \
     41     } \
     42   } while (0)
     43 #endif
     44 #endif
     45 
     46 
     47 struct vpx_usec_timer {
     48 #if defined(_WIN32)
     49   LARGE_INTEGER  begin, end;
     50 #else
     51   struct timeval begin, end;
     52 #endif
     53 };
     54 
     55 
     56 static void
     57 vpx_usec_timer_start(struct vpx_usec_timer *t) {
     58 #if defined(_WIN32)
     59   QueryPerformanceCounter(&t->begin);
     60 #else
     61   gettimeofday(&t->begin, NULL);
     62 #endif
     63 }
     64 
     65 
     66 static void
     67 vpx_usec_timer_mark(struct vpx_usec_timer *t) {
     68 #if defined(_WIN32)
     69   QueryPerformanceCounter(&t->end);
     70 #else
     71   gettimeofday(&t->end, NULL);
     72 #endif
     73 }
     74 
     75 
     76 static int64_t
     77 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
     78 #if defined(_WIN32)
     79   LARGE_INTEGER freq, diff;
     80 
     81   diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
     82 
     83   QueryPerformanceFrequency(&freq);
     84   return diff.QuadPart * 1000000 / freq.QuadPart;
     85 #else
     86   struct timeval diff;
     87 
     88   timersub(&t->end, &t->begin, &diff);
     89   return diff.tv_sec * 1000000 + diff.tv_usec;
     90 #endif
     91 }
     92 
     93 #else /* CONFIG_OS_SUPPORT = 0*/
     94 
     95 /* Empty timer functions if CONFIG_OS_SUPPORT = 0 */
     96 #ifndef timersub
     97 #define timersub(a, b, result)
     98 #endif
     99 
    100 struct vpx_usec_timer {
    101   void *dummy;
    102 };
    103 
    104 static void
    105 vpx_usec_timer_start(struct vpx_usec_timer *t) { }
    106 
    107 static void
    108 vpx_usec_timer_mark(struct vpx_usec_timer *t) { }
    109 
    110 static long
    111 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
    112   return 0;
    113 }
    114 
    115 #endif /* CONFIG_OS_SUPPORT */
    116 
    117 #endif
    118