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
