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 15 #if CONFIG_OS_SUPPORT 16 17 #if defined(_WIN32) 18 /* 19 * Win32 specific includes 20 */ 21 #ifndef WIN32_LEAN_AND_MEAN 22 #define WIN32_LEAN_AND_MEAN 23 #endif 24 #include <windows.h> 25 #else 26 /* 27 * POSIX specific includes 28 */ 29 #include <sys/time.h> 30 31 /* timersub is not provided by msys at this time. */ 32 #ifndef timersub 33 #define timersub(a, b, result) \ 34 do { \ 35 (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ 36 (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ 37 if ((result)->tv_usec < 0) { \ 38 --(result)->tv_sec; \ 39 (result)->tv_usec += 1000000; \ 40 } \ 41 } while (0) 42 #endif 43 #endif 44 45 46 struct vpx_usec_timer 47 { 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 { 59 #if defined(_WIN32) 60 QueryPerformanceCounter(&t->begin); 61 #else 62 gettimeofday(&t->begin, NULL); 63 #endif 64 } 65 66 67 static void 68 vpx_usec_timer_mark(struct vpx_usec_timer *t) 69 { 70 #if defined(_WIN32) 71 QueryPerformanceCounter(&t->end); 72 #else 73 gettimeofday(&t->end, NULL); 74 #endif 75 } 76 77 78 static long 79 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) 80 { 81 #if defined(_WIN32) 82 LARGE_INTEGER freq, diff; 83 84 diff.QuadPart = t->end.QuadPart - t->begin.QuadPart; 85 86 if (QueryPerformanceFrequency(&freq) && diff.QuadPart < freq.QuadPart) 87 return (long)(diff.QuadPart * 1000000 / freq.QuadPart); 88 89 return 1000000; 90 #else 91 struct timeval diff; 92 93 timersub(&t->end, &t->begin, &diff); 94 return diff.tv_sec ? 1000000 : diff.tv_usec; 95 #endif 96 } 97 98 #else /* CONFIG_OS_SUPPORT = 0*/ 99 100 /* Empty timer functions if CONFIG_OS_SUPPORT = 0 */ 101 #ifndef timersub 102 #define timersub(a, b, result) 103 #endif 104 105 struct vpx_usec_timer 106 { 107 void *dummy; 108 }; 109 110 static void 111 vpx_usec_timer_start(struct vpx_usec_timer *t) { } 112 113 static void 114 vpx_usec_timer_mark(struct vpx_usec_timer *t) { } 115 116 static long 117 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) { return 0; } 118 119 #endif /* CONFIG_OS_SUPPORT */ 120 121 #endif 122
