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libavutil
aarch64
timer.h
Go to the documentation of this file.
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/*
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* Copyright (c) 2015 Janne Grunau <janne-libav@jannau.net>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_AARCH64_TIMER_H
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#define AVUTIL_AARCH64_TIMER_H
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#include <stdint.h>
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#include "
config.h
"
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#if HAVE_INLINE_ASM
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#define AV_READ_TIME read_time
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static
inline
uint64_t
read_time
(
void
)
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{
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uint64_t cycle_counter;
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__asm__
volatile
(
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"isb \t\n"
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"mrs %0, pmccntr_el0 "
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:
"=r"
(cycle_counter) ::
"memory"
);
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return
cycle_counter;
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}
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#endif
/* HAVE_INLINE_ASM */
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#endif
/* AVUTIL_AARCH64_TIMER_H */
read_time
static uint64_t read_time(void)
Definition:
timer.h:28
config.h
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