c6b9039fd9
Approximate the Google style guide[1] so that that there's a written document to follow and tools to check compliance[2]. [1]: http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml [2]: http://google-styleguide.googlecode.com/svn/trunk/cpplint/cpplint.py Change-Id: Idf40e3d8dddcc72150f6af127b13e5dab838685f
119 lines
2.3 KiB
C
119 lines
2.3 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VPX_TIMER_H
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#define VPX_TIMER_H
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#if CONFIG_OS_SUPPORT
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#if defined(_WIN32)
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/*
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* Win32 specific includes
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*/
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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#else
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/*
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* POSIX specific includes
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*/
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#include <sys/time.h>
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/* timersub is not provided by msys at this time. */
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#ifndef timersub
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#define timersub(a, b, result) \
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do { \
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(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
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(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
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if ((result)->tv_usec < 0) { \
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--(result)->tv_sec; \
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(result)->tv_usec += 1000000; \
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} \
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} while (0)
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#endif
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#endif
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struct vpx_usec_timer {
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#if defined(_WIN32)
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LARGE_INTEGER begin, end;
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#else
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struct timeval begin, end;
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#endif
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};
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static void
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vpx_usec_timer_start(struct vpx_usec_timer *t) {
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#if defined(_WIN32)
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QueryPerformanceCounter(&t->begin);
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#else
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gettimeofday(&t->begin, NULL);
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#endif
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}
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static void
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vpx_usec_timer_mark(struct vpx_usec_timer *t) {
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#if defined(_WIN32)
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QueryPerformanceCounter(&t->end);
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#else
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gettimeofday(&t->end, NULL);
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#endif
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}
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static long
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vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
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#if defined(_WIN32)
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LARGE_INTEGER freq, diff;
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diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
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if (QueryPerformanceFrequency(&freq) && diff.QuadPart < freq.QuadPart)
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return (long)(diff.QuadPart * 1000000 / freq.QuadPart);
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return 1000000;
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#else
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struct timeval diff;
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timersub(&t->end, &t->begin, &diff);
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return diff.tv_sec ? 1000000 : diff.tv_usec;
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#endif
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}
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#else /* CONFIG_OS_SUPPORT = 0*/
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/* Empty timer functions if CONFIG_OS_SUPPORT = 0 */
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#ifndef timersub
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#define timersub(a, b, result)
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#endif
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struct vpx_usec_timer {
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void *dummy;
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};
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static void
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vpx_usec_timer_start(struct vpx_usec_timer *t) { }
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static void
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vpx_usec_timer_mark(struct vpx_usec_timer *t) { }
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static long
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vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
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return 0;
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}
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#endif /* CONFIG_OS_SUPPORT */
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#endif
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