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1/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
2/*
3 * time function definitions for NOLIBC
4 * Copyright (C) 2017-2022 Willy Tarreau <[email protected]>
5 */
6
7/* make sure to include all global symbols */
8#include "nolibc.h"
9
10#ifndef _NOLIBC_TIME_H
11#define _NOLIBC_TIME_H
12
13#include "std.h"
14#include "arch.h"
15#include "types.h"
16#include "sys.h"
17
18#include <linux/signal.h>
19#include <linux/time.h>
20
21#define __nolibc_assert_time64_type(t) \
22 __nolibc_static_assert(sizeof(t) == 8)
23
24#define __nolibc_assert_native_time64() \
25 __nolibc_assert_time64_type(__kernel_old_time_t)
26
27/*
28 * int clock_getres(clockid_t clockid, struct timespec *res);
29 * int clock_gettime(clockid_t clockid, struct timespec *tp);
30 * int clock_settime(clockid_t clockid, const struct timespec *tp);
31 * int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp,
32 * struct timespec *rmtp)
33 */
34
35static __attribute__((unused))
36int _sys_clock_getres(clockid_t clockid, struct timespec *res)
37{
38#if defined(__NR_clock_getres_time64)
39 __nolibc_assert_time64_type(res->tv_sec);
40 return __nolibc_syscall2(__NR_clock_getres_time64, clockid, res);
41#else
42 __nolibc_assert_native_time64();
43 return __nolibc_syscall2(__NR_clock_getres, clockid, res);
44#endif
45}
46
47static __attribute__((unused))
48int clock_getres(clockid_t clockid, struct timespec *res)
49{
50 return __sysret(_sys_clock_getres(clockid, res));
51}
52
53static __attribute__((unused))
54int _sys_clock_gettime(clockid_t clockid, struct timespec *tp)
55{
56#if defined(__NR_clock_gettime64)
57 __nolibc_assert_time64_type(tp->tv_sec);
58 return __nolibc_syscall2(__NR_clock_gettime64, clockid, tp);
59#else
60 __nolibc_assert_native_time64();
61 return __nolibc_syscall2(__NR_clock_gettime, clockid, tp);
62#endif
63}
64
65static __attribute__((unused))
66int clock_gettime(clockid_t clockid, struct timespec *tp)
67{
68 return __sysret(_sys_clock_gettime(clockid, tp));
69}
70
71static __attribute__((unused))
72int _sys_clock_settime(clockid_t clockid, struct timespec *tp)
73{
74#if defined(__NR_clock_settime64)
75 __nolibc_assert_time64_type(tp->tv_sec);
76 return __nolibc_syscall2(__NR_clock_settime64, clockid, tp);
77#else
78 __nolibc_assert_native_time64();
79 return __nolibc_syscall2(__NR_clock_settime, clockid, tp);
80#endif
81}
82
83static __attribute__((unused))
84int clock_settime(clockid_t clockid, struct timespec *tp)
85{
86 return __sysret(_sys_clock_settime(clockid, tp));
87}
88
89static __attribute__((unused))
90int _sys_clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp,
91 struct timespec *rmtp)
92{
93#if defined(__NR_clock_nanosleep_time64)
94 __nolibc_assert_time64_type(rqtp->tv_sec);
95 return __nolibc_syscall4(__NR_clock_nanosleep_time64, clockid, flags, rqtp, rmtp);
96#else
97 __nolibc_assert_native_time64();
98 return __nolibc_syscall4(__NR_clock_nanosleep, clockid, flags, rqtp, rmtp);
99#endif
100}
101
102static __attribute__((unused))
103int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp,
104 struct timespec *rmtp)
105{
106 /* Directly return a positive error number */
107 return -_sys_clock_nanosleep(clockid, flags, rqtp, rmtp);
108}
109
110static __inline__
111double difftime(time_t time1, time_t time2)
112{
113 return time1 - time2;
114}
115
116static __inline__
117int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
118{
119 return __sysret(_sys_clock_nanosleep(CLOCK_REALTIME, 0, rqtp, rmtp));
120}
121
122
123static __attribute__((unused))
124time_t time(time_t *tptr)
125{
126 struct timeval tv;
127
128 /* note, cannot fail here */
129 _sys_gettimeofday(&tv, NULL);
130
131 if (tptr)
132 *tptr = tv.tv_sec;
133 return tv.tv_sec;
134}
135
136
137/*
138 * int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid);
139 * int timer_gettime(timer_t timerid, struct itimerspec *curr_value);
140 * int timer_settime(timer_t timerid, int flags, const struct itimerspec *new_value, struct itimerspec *old_value);
141 */
142
143static __attribute__((unused))
144int _sys_timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)
145{
146 return __nolibc_syscall3(__NR_timer_create, clockid, evp, timerid);
147}
148
149static __attribute__((unused))
150int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)
151{
152 return __sysret(_sys_timer_create(clockid, evp, timerid));
153}
154
155static __attribute__((unused))
156int _sys_timer_delete(timer_t timerid)
157{
158 return __nolibc_syscall1(__NR_timer_delete, timerid);
159}
160
161static __attribute__((unused))
162int timer_delete(timer_t timerid)
163{
164 return __sysret(_sys_timer_delete(timerid));
165}
166
167static __attribute__((unused))
168int _sys_timer_gettime(timer_t timerid, struct itimerspec *curr_value)
169{
170#if defined(__NR_timer_gettime64)
171 __nolibc_assert_time64_type(curr_value->it_value.tv_sec);
172 return __nolibc_syscall2(__NR_timer_gettime64, timerid, curr_value);
173#else
174 __nolibc_assert_native_time64();
175 return __nolibc_syscall2(__NR_timer_gettime, timerid, curr_value);
176#endif
177}
178
179static __attribute__((unused))
180int timer_gettime(timer_t timerid, struct itimerspec *curr_value)
181{
182 return __sysret(_sys_timer_gettime(timerid, curr_value));
183}
184
185static __attribute__((unused))
186int _sys_timer_settime(timer_t timerid, int flags,
187 const struct itimerspec *new_value, struct itimerspec *old_value)
188{
189#if defined(__NR_timer_settime64)
190 __nolibc_assert_time64_type(new_value->it_value.tv_sec);
191 return __nolibc_syscall4(__NR_timer_settime64, timerid, flags, new_value, old_value);
192#else
193 __nolibc_assert_native_time64();
194 return __nolibc_syscall4(__NR_timer_settime, timerid, flags, new_value, old_value);
195#endif
196}
197
198static __attribute__((unused))
199int timer_settime(timer_t timerid, int flags,
200 const struct itimerspec *new_value, struct itimerspec *old_value)
201{
202 return __sysret(_sys_timer_settime(timerid, flags, new_value, old_value));
203}
204
205#endif /* _NOLIBC_TIME_H */