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/*
* 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_TIMER_H
#define VPX_TIMER_H
#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 void
vpx_usec_timer_start(struct vpx_usec_timer *t)
{
#if defined(_WIN32)
QueryPerformanceCounter(&t->begin);
#else
gettimeofday(&t->begin, NULL);
#endif
}
static void
vpx_usec_timer_mark(struct vpx_usec_timer *t)
{
#if defined(_WIN32)
QueryPerformanceCounter(&t->end);
#else
gettimeofday(&t->end, NULL);
#endif
}
static long
vpx_usec_timer_elapsed(struct vpx_usec_timer *t)
{
#if defined(_WIN32)
LARGE_INTEGER freq, diff;
diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
if (QueryPerformanceFrequency(&freq) && diff.QuadPart < freq.QuadPart)
return (long)(diff.QuadPart * 1000000 / freq.QuadPart);
return 1000000;
#else
struct timeval diff;
timersub(&t->end, &t->begin, &diff);
return diff.tv_sec ? 1000000 : diff.tv_usec;
#endif
}
#endif
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