f1515f6408
This is also slightly faster for the no VDSO case (56ns vs 66ns). Bug: N/A Test: ran tests, benchmarks Change-Id: I2b0edd06ee6942eb57c32678279278a53ca5ee9b
63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/*
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* Copyright (C) 2015 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _PRIVATE_BIONIC_VDSO_H
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#define _PRIVATE_BIONIC_VDSO_H
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#include <time.h>
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#if defined(__aarch64__)
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#define VDSO_CLOCK_GETTIME_SYMBOL "__kernel_clock_gettime"
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#define VDSO_CLOCK_GETRES_SYMBOL "__kernel_clock_getres"
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#define VDSO_GETTIMEOFDAY_SYMBOL "__kernel_gettimeofday"
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#define VDSO_TIME_SYMBOL "__kernel_time"
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#else
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#define VDSO_CLOCK_GETTIME_SYMBOL "__vdso_clock_gettime"
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#define VDSO_CLOCK_GETRES_SYMBOL "__vdso_clock_getres"
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#define VDSO_GETTIMEOFDAY_SYMBOL "__vdso_gettimeofday"
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#define VDSO_TIME_SYMBOL "__vdso_time"
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#endif
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extern "C" int __clock_gettime(int, timespec*);
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extern "C" int __clock_getres(int, timespec*);
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extern "C" int __gettimeofday(timeval*, struct timezone*);
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struct vdso_entry {
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const char* name;
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void* fn;
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};
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enum {
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VDSO_CLOCK_GETTIME = 0,
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VDSO_CLOCK_GETRES,
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VDSO_GETTIMEOFDAY,
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VDSO_TIME,
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VDSO_END
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};
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#endif // _PRIVATE_BIONIC_VDSO_H
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