tools/include/nolibc/time.h

Source file repositories/reference/linux-study-clean/tools/include/nolibc/time.h

File Facts

System
Linux kernel
Corpus path
tools/include/nolibc/time.h
Extension
.h
Size
5655 bytes
Lines
206
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#include "nolibc.h"

#ifndef _NOLIBC_TIME_H
#define _NOLIBC_TIME_H

#include "std.h"
#include "arch.h"
#include "types.h"
#include "sys.h"

#include <linux/signal.h>
#include <linux/time.h>

#define __nolibc_assert_time64_type(t) \
	__nolibc_static_assert(sizeof(t) == 8)

#define __nolibc_assert_native_time64() \
	__nolibc_assert_time64_type(__kernel_old_time_t)

/*
 * int clock_getres(clockid_t clockid, struct timespec *res);
 * int clock_gettime(clockid_t clockid, struct timespec *tp);
 * int clock_settime(clockid_t clockid, const struct timespec *tp);
 * int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp,
 *                     struct timespec *rmtp)
 */

static __attribute__((unused))
int _sys_clock_getres(clockid_t clockid, struct timespec *res)
{
#if defined(__NR_clock_getres_time64)
	__nolibc_assert_time64_type(res->tv_sec);
	return __nolibc_syscall2(__NR_clock_getres_time64, clockid, res);
#else
	__nolibc_assert_native_time64();
	return __nolibc_syscall2(__NR_clock_getres, clockid, res);
#endif
}

static __attribute__((unused))
int clock_getres(clockid_t clockid, struct timespec *res)
{
	return __sysret(_sys_clock_getres(clockid, res));
}

static __attribute__((unused))
int _sys_clock_gettime(clockid_t clockid, struct timespec *tp)
{
#if defined(__NR_clock_gettime64)
	__nolibc_assert_time64_type(tp->tv_sec);
	return __nolibc_syscall2(__NR_clock_gettime64, clockid, tp);
#else
	__nolibc_assert_native_time64();
	return __nolibc_syscall2(__NR_clock_gettime, clockid, tp);
#endif
}

static __attribute__((unused))
int clock_gettime(clockid_t clockid, struct timespec *tp)
{
	return __sysret(_sys_clock_gettime(clockid, tp));
}

static __attribute__((unused))
int _sys_clock_settime(clockid_t clockid, struct timespec *tp)
{
#if defined(__NR_clock_settime64)
	__nolibc_assert_time64_type(tp->tv_sec);
	return __nolibc_syscall2(__NR_clock_settime64, clockid, tp);
#else
	__nolibc_assert_native_time64();
	return __nolibc_syscall2(__NR_clock_settime, clockid, tp);
#endif
}

static __attribute__((unused))
int clock_settime(clockid_t clockid, struct timespec *tp)
{
	return __sysret(_sys_clock_settime(clockid, tp));
}

static __attribute__((unused))
int _sys_clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp,
			 struct timespec *rmtp)
{
#if defined(__NR_clock_nanosleep_time64)
	__nolibc_assert_time64_type(rqtp->tv_sec);
	return __nolibc_syscall4(__NR_clock_nanosleep_time64, clockid, flags, rqtp, rmtp);
#else
	__nolibc_assert_native_time64();

Annotation

Implementation Notes