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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/include/nolibc/sys/timerfd.h
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/* SPDX-License-Identifier: LGPL-2.1 OR MIT */

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/*

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 * timerfd definitions for NOLIBC

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 * Copyright (C) 2025 Thomas Weißschuh <[email protected]>

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 */

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/* make sure to include all global symbols */

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#include "../nolibc.h"

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#ifndef _NOLIBC_SYS_TIMERFD_H

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#define _NOLIBC_SYS_TIMERFD_H

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#include "../sys.h"

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#include "../time.h"

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#include <linux/timerfd.h>

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static __attribute__((unused))

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int sys_timerfd_create(int clockid, int flags)

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{

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	return my_syscall2(__NR_timerfd_create, clockid, flags);

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}

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static __attribute__((unused))

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int timerfd_create(int clockid, int flags)

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{

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	return __sysret(sys_timerfd_create(clockid, flags));

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}

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static __attribute__((unused))

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int sys_timerfd_gettime(int fd, struct itimerspec *curr_value)

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{

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#if defined(__NR_timerfd_gettime)

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	return my_syscall2(__NR_timerfd_gettime, fd, curr_value);

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#elif defined(__NR_timerfd_gettime64)

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	struct __kernel_itimerspec kcurr_value;

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	int ret;

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	ret = my_syscall2(__NR_timerfd_gettime64, fd, &kcurr_value);

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	__nolibc_timespec_kernel_to_user(&kcurr_value.it_interval, &curr_value->it_interval);

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	__nolibc_timespec_kernel_to_user(&kcurr_value.it_value, &curr_value->it_value);

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	return ret;

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#else

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	return __nolibc_enosys(__func__, fd, curr_value);

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#endif

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}

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static __attribute__((unused))

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int timerfd_gettime(int fd, struct itimerspec *curr_value)

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{

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	return __sysret(sys_timerfd_gettime(fd, curr_value));

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}

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static __attribute__((unused))

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int sys_timerfd_settime(int fd, int flags,

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			const struct itimerspec *new_value, struct itimerspec *old_value)

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{

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#if defined(__NR_timerfd_settime)

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	return my_syscall4(__NR_timerfd_settime, fd, flags, new_value, old_value);

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#elif defined(__NR_timerfd_settime64)

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	struct __kernel_itimerspec knew_value, kold_value;

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	int ret;

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	__nolibc_timespec_user_to_kernel(&new_value->it_value, &knew_value.it_value);

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	__nolibc_timespec_user_to_kernel(&new_value->it_interval, &knew_value.it_interval);

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	ret = my_syscall4(__NR_timerfd_settime64, fd, flags, &knew_value, &kold_value);

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	if (old_value) {

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		__nolibc_timespec_kernel_to_user(&kold_value.it_interval, &old_value->it_interval);

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		__nolibc_timespec_kernel_to_user(&kold_value.it_value, &old_value->it_value);

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	}

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	return ret;

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#else

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	return __nolibc_enosys(__func__, fd, flags, new_value, old_value);

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#endif

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}

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static __attribute__((unused))

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int timerfd_settime(int fd, int flags,

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		    const struct itimerspec *new_value, struct itimerspec *old_value)

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{

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	return __sysret(sys_timerfd_settime(fd, flags, new_value, old_value));

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}

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#endif /* _NOLIBC_SYS_TIMERFD_H */

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