ref: 34159b72d9b9d15aaaf2d1e9a7aee426e920ab1a
dir: /vpx_ports/vpx_timer.h/
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #ifndef VPX_PORTS_VPX_TIMER_H_ #define VPX_PORTS_VPX_TIMER_H_ #include "./vpx_config.h" #include "vpx/vpx_integer.h" #if CONFIG_OS_SUPPORT #if defined(_WIN32) /* * Win32 specific includes */ #ifndef WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN #endif #include <windows.h> #else /* * POSIX specific includes */ #include <sys/time.h> /* timersub is not provided by msys at this time. */ #ifndef timersub #define timersub(a, b, result) \ do { \ (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ if ((result)->tv_usec < 0) { \ --(result)->tv_sec; \ (result)->tv_usec += 1000000; \ } \ } while (0) #endif #endif struct vpx_usec_timer { #if defined(_WIN32) LARGE_INTEGER begin, end; #else struct timeval begin, end; #endif }; static INLINE void vpx_usec_timer_start(struct vpx_usec_timer *t) { #if defined(_WIN32) QueryPerformanceCounter(&t->begin); #else gettimeofday(&t->begin, NULL); #endif } static INLINE void vpx_usec_timer_mark(struct vpx_usec_timer *t) { #if defined(_WIN32) QueryPerformanceCounter(&t->end); #else gettimeofday(&t->end, NULL); #endif } static INLINE int64_t vpx_usec_timer_elapsed(struct vpx_usec_timer *t) { #if defined(_WIN32) LARGE_INTEGER freq, diff; diff.QuadPart = t->end.QuadPart - t->begin.QuadPart; QueryPerformanceFrequency(&freq); return diff.QuadPart * 1000000 / freq.QuadPart; #else struct timeval diff; timersub(&t->end, &t->begin, &diff); return diff.tv_sec * 1000000 + diff.tv_usec; #endif } #else /* CONFIG_OS_SUPPORT = 0*/ /* Empty timer functions if CONFIG_OS_SUPPORT = 0 */ #ifndef timersub #define timersub(a, b, result) #endif struct vpx_usec_timer { void *dummy; }; static INLINE void vpx_usec_timer_start(struct vpx_usec_timer *t) { } static INLINE void vpx_usec_timer_mark(struct vpx_usec_timer *t) { } static INLINE int vpx_usec_timer_elapsed(struct vpx_usec_timer *t) { return 0; } #endif /* CONFIG_OS_SUPPORT */ #endif // VPX_PORTS_VPX_TIMER_H_