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0f6e6b9764
This patch replaces auto generated wrapper (as described in sysdeps/unix/sysv/linux/syscalls.list) for timerfd_gettime with one which adds extra support for reading 64 bit time values on machines with __TIMESIZE != 64. There is no functional change for architectures already supporting 64 bit time ABI. This patch is conceptually identical to timer_gettime conversion already done in sysdeps/unix/sysv/linux/timer_gettime.c. Please refer to corresponding commit message for detailed description of introduced functions and the testing procedure. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> --- Changes for v4: - Update date from 2019 to 2020 Changes for v3: - Add missing libc_hidden_def() Changes for v2: - Remove "Contributed by" from the file header - Remove early check for (fd < 0) in __timerfd_gettime64 as the fd correctness check is already done in Linux kernel - Add single descriptive comment line to provide concise explanation of the code
69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/* timerfd_gettime -- get the timer setting referred to by file descriptor.
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Copyright (C) 2020 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_gettime64 (int fd, struct __itimerspec64 *value)
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{
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#ifdef __ASSUME_TIME64_SYSCALLS
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# ifndef __NR_timerfd_gettime64
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# define __NR_timerfd_gettime64 __NR_timerfd_gettime
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# endif
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return INLINE_SYSCALL_CALL (timerfd_gettime64, fd, value);
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#else
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# ifdef __NR_timerfd_gettime64
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int ret = INLINE_SYSCALL_CALL (timerfd_gettime64, fd, value);
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if (ret == 0 || errno != ENOSYS)
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return ret;
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# endif
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struct itimerspec its32;
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int retval = INLINE_SYSCALL_CALL (timerfd_gettime, fd, &its32);
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if (retval == 0)
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{
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value->it_interval = valid_timespec_to_timespec64 (its32.it_interval);
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value->it_value = valid_timespec_to_timespec64 (its32.it_value);
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}
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return retval;
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#endif
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}
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#if __TIMESIZE != 64
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libc_hidden_def (__timerfd_gettime64)
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int
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__timerfd_gettime (int fd, struct itimerspec *value)
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{
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struct __itimerspec64 its64;
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int retval = __timerfd_gettime64 (fd, &its64);
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if (retval == 0)
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{
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value->it_interval = valid_timespec64_to_timespec (its64.it_interval);
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value->it_value = valid_timespec64_to_timespec (its64.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_gettime, timerfd_gettime)
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