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