2c0982eb93
For !__ASSUME_TIME64_SYSCALLS there is no need to issue a 64-bit syscall if the provided timeout fits in a 32-bit one. The 64-bit usage should be rare since the timeout is a relative one. Checked on i686-linux-gnu on a 4.15 kernel and on a 5.11 kernel (with and without --enable-kernel=5.1) and on x86_64-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/* timerfd_settime -- start or stop the timer referred to by file descriptor.
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Copyright (C) 2020-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library 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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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdlib.h>
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#include <time.h>
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#include <sysdep.h>
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#include <kernel-features.h>
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int
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__timerfd_settime64 (int fd, int flags, const struct __itimerspec64 *value,
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struct __itimerspec64 *ovalue)
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{
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#ifndef __NR_timerfd_settime64
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# define __NR_timerfd_settime64 __NR_timerfd_settime
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#endif
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#ifdef __ASSUME_TIME64_SYSCALLS
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return INLINE_SYSCALL_CALL (timerfd_settime64, fd, flags, value, ovalue);
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#else
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bool need_time64 = !in_time_t_range (value->it_value.tv_sec)
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|| !in_time_t_range (value->it_interval.tv_sec);
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if (need_time64)
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{
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int r = INLINE_SYSCALL_CALL (timerfd_settime64, fd, flags, value,
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ovalue);
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if (r == 0 || errno != ENOSYS)
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return r;
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__set_errno (EOVERFLOW);
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return r;
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}
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struct itimerspec its32, oits32;
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its32.it_interval = valid_timespec64_to_timespec (value->it_interval);
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its32.it_value = valid_timespec64_to_timespec (value->it_value);
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int ret = INLINE_SYSCALL_CALL (timerfd_settime, fd, flags,
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&its32, ovalue != NULL ? &oits32 : NULL);
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if (ret == 0 && ovalue != NULL)
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{
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ovalue->it_interval = valid_timespec_to_timespec64 (oits32.it_interval);
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ovalue->it_value = valid_timespec_to_timespec64 (oits32.it_value);
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}
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return ret;
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#endif
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}
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#if __TIMESIZE != 64
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libc_hidden_def (__timerfd_settime64)
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int
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__timerfd_settime (int fd, int flags, const struct itimerspec *value,
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struct itimerspec *ovalue)
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{
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struct __itimerspec64 its64, oits64;
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int retval;
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its64.it_interval = valid_timespec_to_timespec64 (value->it_interval);
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its64.it_value = valid_timespec_to_timespec64 (value->it_value);
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retval = __timerfd_settime64 (fd, flags, &its64, ovalue ? &oits64 : NULL);
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if (retval == 0 && ovalue)
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{
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ovalue->it_interval = valid_timespec64_to_timespec (oits64.it_interval);
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ovalue->it_value = valid_timespec64_to_timespec (oits64.it_value);
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}
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return retval;
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}
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#endif
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strong_alias (__timerfd_settime, timerfd_settime)
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