1 | /* $NetBSD: timevar.h,v 1.36 2016/03/08 05:02:55 christos Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2005, 2008 The NetBSD Foundation. |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
17 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
26 | * POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | /* |
30 | * Copyright (c) 1982, 1986, 1993 |
31 | * The Regents of the University of California. All rights reserved. |
32 | * |
33 | * Redistribution and use in source and binary forms, with or without |
34 | * modification, are permitted provided that the following conditions |
35 | * are met: |
36 | * 1. Redistributions of source code must retain the above copyright |
37 | * notice, this list of conditions and the following disclaimer. |
38 | * 2. Redistributions in binary form must reproduce the above copyright |
39 | * notice, this list of conditions and the following disclaimer in the |
40 | * documentation and/or other materials provided with the distribution. |
41 | * 3. Neither the name of the University nor the names of its contributors |
42 | * may be used to endorse or promote products derived from this software |
43 | * without specific prior written permission. |
44 | * |
45 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
46 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
47 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
48 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
49 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
50 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
51 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
52 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
53 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
54 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
55 | * SUCH DAMAGE. |
56 | * |
57 | * @(#)time.h 8.5 (Berkeley) 5/4/95 |
58 | */ |
59 | |
60 | #ifndef _SYS_TIMEVAR_H_ |
61 | #define _SYS_TIMEVAR_H_ |
62 | |
63 | #include <sys/callout.h> |
64 | #include <sys/queue.h> |
65 | #include <sys/signal.h> |
66 | #include <sys/systm.h> |
67 | |
68 | /* |
69 | * Structure used to manage timers in a process. |
70 | */ |
71 | struct ptimer { |
72 | union { |
73 | callout_t pt_ch; |
74 | struct { |
75 | LIST_ENTRY(ptimer) pt_list; |
76 | int pt_active; |
77 | } pt_nonreal; |
78 | } pt_data; |
79 | struct sigevent pt_ev; |
80 | struct itimerspec pt_time; |
81 | struct ksiginfo pt_info; |
82 | int pt_overruns; /* Overruns currently accumulating */ |
83 | int pt_poverruns; /* Overruns associated w/ a delivery */ |
84 | int pt_type; |
85 | int pt_entry; |
86 | int pt_queued; |
87 | struct proc *pt_proc; |
88 | TAILQ_ENTRY(ptimer) pt_chain; |
89 | }; |
90 | |
91 | #define pt_ch pt_data.pt_ch |
92 | #define pt_list pt_data.pt_nonreal.pt_list |
93 | #define pt_active pt_data.pt_nonreal.pt_active |
94 | |
95 | #define TIMER_MIN 4 /* [0..3] are reserved for setitimer(2) */ |
96 | /* REAL=0,VIRTUAL=1,PROF=2,MONOTONIC=3 */ |
97 | #define TIMER_MAX 36 /* 32 is minimum user timers per POSIX */ |
98 | #define TIMERS_ALL 0 |
99 | #define TIMERS_POSIX 1 |
100 | |
101 | LIST_HEAD(ptlist, ptimer); |
102 | |
103 | struct ptimers { |
104 | struct ptlist pts_virtual; |
105 | struct ptlist pts_prof; |
106 | struct ptimer *pts_timers[TIMER_MAX]; |
107 | }; |
108 | |
109 | /* |
110 | * Functions for looking at our clock: [get]{bin,nano,micro}[up]time() |
111 | * |
112 | * Functions without the "get" prefix returns the best timestamp |
113 | * we can produce in the given format. |
114 | * |
115 | * "bin" == struct bintime == seconds + 64 bit fraction of seconds. |
116 | * "nano" == struct timespec == seconds + nanoseconds. |
117 | * "micro" == struct timeval == seconds + microseconds. |
118 | * |
119 | * Functions containing "up" returns time relative to boot and |
120 | * should be used for calculating time intervals. |
121 | * |
122 | * Functions without "up" returns GMT time. |
123 | * |
124 | * Functions with the "get" prefix returns a less precise result |
125 | * much faster than the functions without "get" prefix and should |
126 | * be used where a precision of 1/HZ (eg 10 msec on a 100HZ machine) |
127 | * is acceptable or where performance is priority. |
128 | * (NB: "precision", _not_ "resolution" !) |
129 | * |
130 | */ |
131 | |
132 | void binuptime(struct bintime *); |
133 | void nanouptime(struct timespec *); |
134 | void microuptime(struct timeval *); |
135 | |
136 | void bintime(struct bintime *); |
137 | void nanotime(struct timespec *); |
138 | void microtime(struct timeval *); |
139 | |
140 | void getbinuptime(struct bintime *); |
141 | void getnanouptime(struct timespec *); |
142 | void getmicrouptime(struct timeval *); |
143 | |
144 | void getbintime(struct bintime *); |
145 | void getnanotime(struct timespec *); |
146 | void getmicrotime(struct timeval *); |
147 | |
148 | /* Other functions */ |
149 | int ts2timo(clockid_t, int, struct timespec *, int *, struct timespec *); |
150 | void adjtime1(const struct timeval *, struct timeval *, struct proc *); |
151 | int clock_getres1(clockid_t, struct timespec *); |
152 | int clock_gettime1(clockid_t, struct timespec *); |
153 | int clock_settime1(struct proc *, clockid_t, const struct timespec *, bool); |
154 | int dogetitimer(struct proc *, int, struct itimerval *); |
155 | int dosetitimer(struct proc *, int, struct itimerval *); |
156 | int dotimer_gettime(int, struct proc *, struct itimerspec *); |
157 | int dotimer_settime(int, struct itimerspec *, struct itimerspec *, int, |
158 | struct proc *); |
159 | int tshzto(const struct timespec *); |
160 | int tshztoup(const struct timespec *); |
161 | int tvhzto(const struct timeval *); |
162 | void inittimecounter(void); |
163 | int itimerfix(struct timeval *); |
164 | int itimespecfix(struct timespec *); |
165 | int ppsratecheck(struct timeval *, int *, int); |
166 | int ratecheck(struct timeval *, const struct timeval *); |
167 | void realtimerexpire(void *); |
168 | int settime(struct proc *p, struct timespec *); |
169 | int nanosleep1(struct lwp *, clockid_t, int, struct timespec *, |
170 | struct timespec *); |
171 | int settimeofday1(const struct timeval *, bool, |
172 | const void *, struct lwp *, bool); |
173 | int timer_create1(timer_t *, clockid_t, struct sigevent *, copyin_t, |
174 | struct lwp *); |
175 | void timer_gettime(struct ptimer *, struct itimerspec *); |
176 | void timer_settime(struct ptimer *); |
177 | struct ptimers *timers_alloc(struct proc *); |
178 | void timers_free(struct proc *, int); |
179 | void timer_tick(struct lwp *, bool); |
180 | int tstohz(const struct timespec *); |
181 | int tvtohz(const struct timeval *); |
182 | int inittimeleft(struct timespec *, struct timespec *); |
183 | int gettimeleft(struct timespec *, struct timespec *); |
184 | void timerupcall(struct lwp *); |
185 | void time_init(void); |
186 | void time_init2(void); |
187 | bool time_wraps(struct timespec *, struct timespec *); |
188 | |
189 | extern volatile time_t time_second; /* current second in the epoch */ |
190 | extern volatile time_t time_uptime; /* system uptime in seconds */ |
191 | |
192 | static inline time_t time_mono_to_wall(time_t t) |
193 | { |
194 | |
195 | return t - time_uptime + time_second; |
196 | } |
197 | |
198 | static inline time_t time_wall_to_mono(time_t t) |
199 | { |
200 | |
201 | return t - time_second + time_uptime; |
202 | } |
203 | |
204 | #endif /* !_SYS_TIMEVAR_H_ */ |
205 | |