113 lines
4.4 KiB
C
113 lines
4.4 KiB
C
/*
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* Copyright (C) 2008 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 _SYS_TIME_H_
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#define _SYS_TIME_H_
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <linux/time.h>
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/* POSIX says <sys/time.h> gets you most of <sys/select.h> and may get you all of it. */
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#include <sys/select.h>
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__BEGIN_DECLS
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int gettimeofday(struct timeval* _Nullable __tv, struct timezone* _Nullable __tz);
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int settimeofday(const struct timeval* _Nullable __tv, const struct timezone* _Nullable __tz);
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int getitimer(int __which, struct itimerval* _Nonnull __current_value);
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int setitimer(int __which, const struct itimerval* _Nonnull __new_value, struct itimerval* _Nullable __old_value);
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int utimes(const char* _Nonnull __path, const struct timeval __times[_Nullable 2]);
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#if defined(__USE_BSD)
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int futimes(int __fd, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
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int lutimes(const char* _Nonnull __path, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
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#endif
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#if defined(__USE_GNU)
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/**
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* [futimesat(2)](https://man7.org/linux/man-pages/man2/futimesat.2.html) sets
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* file timestamps.
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*
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* Note: Linux supports `__path` being NULL (in which case `__dir_fd` need not
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* be a directory), allowing futimensat() to be implemented with utimensat().
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* Most callers should just use utimensat() directly, especially on Android
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* where utimensat() has been available for longer than futimesat().
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*
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* Returns 0 on success and -1 and sets `errno` on failure.
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*
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* Available since API level 26.
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*/
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int futimesat(int __dir_fd, const char* __BIONIC_COMPLICATED_NULLNESS __path, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
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#endif
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#define timerclear(a) \
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((a)->tv_sec = (a)->tv_usec = 0)
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#define timerisset(a) \
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((a)->tv_sec != 0 || (a)->tv_usec != 0)
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#define timercmp(a, b, op) \
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((a)->tv_sec == (b)->tv_sec \
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? (a)->tv_usec op (b)->tv_usec \
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: (a)->tv_sec op (b)->tv_sec)
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#define timeradd(a, b, res) \
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do { \
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(res)->tv_sec = (a)->tv_sec + (b)->tv_sec; \
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(res)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
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if ((res)->tv_usec >= 1000000) { \
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(res)->tv_usec -= 1000000; \
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(res)->tv_sec += 1; \
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} \
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} while (0)
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#define timersub(a, b, res) \
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do { \
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(res)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
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(res)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
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if ((res)->tv_usec < 0) { \
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(res)->tv_usec += 1000000; \
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(res)->tv_sec -= 1; \
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} \
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} while (0)
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#define TIMEVAL_TO_TIMESPEC(tv, ts) { \
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(ts)->tv_sec = (tv)->tv_sec; \
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(ts)->tv_nsec = (tv)->tv_usec * 1000; \
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}
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#define TIMESPEC_TO_TIMEVAL(tv, ts) { \
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(tv)->tv_sec = (ts)->tv_sec; \
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(tv)->tv_usec = (ts)->tv_nsec / 1000; \
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}
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__END_DECLS
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#endif
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