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https://github.com/webmproject/libwebp.git
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8301da1380
WEBP_INLINE -> webp/types.h
memcpy -> string.h
(cherry picked from commit 54edbf65ff)
Change-Id: Iab2ea8b553dc98be75eede751de62ab0292d1f97
64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
// Copyright 2011 Google Inc. 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 COPYING 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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//
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// Helper functions to measure elapsed time.
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//
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// Author: Mikolaj Zalewski (mikolajz@google.com)
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#ifndef WEBP_EXAMPLES_STOPWATCH_H_
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#define WEBP_EXAMPLES_STOPWATCH_H_
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#include "webp/types.h"
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#if defined _WIN32 && !defined __GNUC__
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#include <windows.h>
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typedef LARGE_INTEGER Stopwatch;
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static WEBP_INLINE void StopwatchReset(Stopwatch* watch) {
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QueryPerformanceCounter(watch);
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}
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static WEBP_INLINE double StopwatchReadAndReset(Stopwatch* watch) {
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const LARGE_INTEGER old_value = *watch;
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LARGE_INTEGER freq;
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if (!QueryPerformanceCounter(watch))
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return 0.0;
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if (!QueryPerformanceFrequency(&freq))
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return 0.0;
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if (freq.QuadPart == 0)
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return 0.0;
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return (watch->QuadPart - old_value.QuadPart) / (double)freq.QuadPart;
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}
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#else /* !_WIN32 */
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#include <string.h> // memcpy
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#include <sys/time.h>
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typedef struct timeval Stopwatch;
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static WEBP_INLINE void StopwatchReset(Stopwatch* watch) {
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gettimeofday(watch, NULL);
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}
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static WEBP_INLINE double StopwatchReadAndReset(Stopwatch* watch) {
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struct timeval old_value;
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double delta_sec, delta_usec;
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memcpy(&old_value, watch, sizeof(old_value));
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gettimeofday(watch, NULL);
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delta_sec = (double)watch->tv_sec - old_value.tv_sec;
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delta_usec = (double)watch->tv_usec - old_value.tv_usec;
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return delta_sec + delta_usec / 1000000.0;
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}
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#endif /* _WIN32 */
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#endif /* WEBP_EXAMPLES_STOPWATCH_H_ */
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