timer: use mach_absolute_time as high resolution clock on darwin
[libav.git] / libavutil / timer.h
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6168781f 1/*
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2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
2912e87a 4 * This file is part of Libav.
2f5421d5 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
2912e87a 17 * License along with Libav; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
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21/**
22 * @file
23 * high precision timer, useful to profile code
24 */
25
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26#ifndef AVUTIL_TIMER_H
27#define AVUTIL_TIMER_H
28
29#include <stdlib.h>
30#include <stdint.h>
1d9c2dc8 31#include <inttypes.h>
dff4af44 32
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33#include "config.h"
34
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35#if HAVE_MACH_MACH_TIME_H
36#include <mach/mach_time.h>
37#endif
38
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39#include "log.h"
40
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41#if ARCH_ARM
42# include "arm/timer.h"
43#elif ARCH_BFIN
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44# include "bfin/timer.h"
45#elif ARCH_PPC
46# include "ppc/timer.h"
47#elif ARCH_X86
48# include "x86/timer.h"
2f5421d5 49#endif
439ccc4e 50
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51#if !defined(AV_READ_TIME)
52# if HAVE_GETHRTIME
53# define AV_READ_TIME gethrtime
54# elif HAVE_MACH_ABSOLUTE_TIME
55# define AV_READ_TIME mach_absolute_time
56# endif
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57#endif
58
59#ifdef AV_READ_TIME
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60#define START_TIMER \
61 uint64_t tend; \
62 uint64_t tstart = AV_READ_TIME(); \
2f5421d5 63
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64#define STOP_TIMER(id) \
65 tend = AV_READ_TIME(); \
66 { \
67 static uint64_t tsum = 0; \
68 static int tcount = 0; \
69 static int tskip_count = 0; \
70 if (tcount < 2 || \
71 tend - tstart < 8 * tsum / tcount || \
72 tend - tstart < 2000) { \
73 tsum+= tend - tstart; \
74 tcount++; \
75 } else \
76 tskip_count++; \
77 if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
78 av_log(NULL, AV_LOG_ERROR, \
c708b540 79 "%"PRIu64" UNITS in %s, %d runs, %d skips\n", \
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80 tsum * 10 / tcount, id, tcount, tskip_count); \
81 } \
82 }
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83#else
84#define START_TIMER
dff4af44 85#define STOP_TIMER(id) { }
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86#endif
87
88#endif /* AVUTIL_TIMER_H */