platform_bionic/libc/private/bionic_time_conversions.h
Elliott Hughes dd586f2ebd sem_timedwait with a null timeout doesn't mean "forever".
It actually means "crash immediately". Well, it's an error. And callers are
much more likely to realize their mistake if we crash immediately rather
than return EINVAL. Historically, glibc has crashed and bionic -- before
the recent changes -- returned EINVAL, so this is a behavior change.

Change-Id: I0c2373a6703b20b8a97aacc1e66368a5885e8c51
2015-12-16 15:15:58 -08:00

65 lines
2.3 KiB
C

/*
* Copyright (C) 2013 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _BIONIC_TIME_CONVERSIONS_H
#define _BIONIC_TIME_CONVERSIONS_H
#include <errno.h>
#include <time.h>
#include <sys/cdefs.h>
#include "private/bionic_constants.h"
__BEGIN_DECLS
__LIBC_HIDDEN__ bool timespec_from_timeval(timespec& ts, const timeval& tv);
__LIBC_HIDDEN__ void timespec_from_ms(timespec& ts, const int ms);
__LIBC_HIDDEN__ void timeval_from_timespec(timeval& tv, const timespec& ts);
__LIBC_HIDDEN__ void absolute_timespec_from_timespec(timespec& abs_ts, const timespec& ts,
clockid_t clock);
__END_DECLS
static inline int check_timespec(const timespec* ts, bool null_allowed) {
if (null_allowed && ts == nullptr) {
return 0;
}
// glibc just segfaults if you pass a null timespec.
// That seems a lot more likely to catch bad code than returning EINVAL.
if (ts->tv_nsec < 0 || ts->tv_nsec >= NS_PER_S) {
return EINVAL;
}
if (ts->tv_sec < 0) {
return ETIMEDOUT;
}
return 0;
}
#endif