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0ed99ce4 | 1 | /* Copyright (C) 1991,92,93,94,96,97,98,99,2000 Free Software Foundation, Inc. |
b5791037 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
b5791037 UD |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | License, or (at your option) any later version. | |
28f540f4 | 8 | |
b5791037 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Library General Public License for more details. | |
28f540f4 | 13 | |
b5791037 UD |
14 | You should have received a copy of the GNU Library General Public |
15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | Boston, MA 02111-1307, USA. */ | |
28f540f4 RM |
18 | |
19 | #ifndef _SYS_TIME_H | |
28f540f4 | 20 | #define _SYS_TIME_H 1 |
5107cf1d | 21 | |
28f540f4 RM |
22 | #include <features.h> |
23 | ||
24 | #include <time.h> | |
df4ef2ab | 25 | #include <sys/select.h> |
28f540f4 | 26 | |
f0e44959 | 27 | #define __need_timeval |
5107cf1d | 28 | #include <bits/time.h> |
28f540f4 | 29 | |
0ed99ce4 UD |
30 | #ifndef __suseconds_t_defined |
31 | typedef __suseconds_t suseconds_t; | |
32 | # define __suseconds_t_defined | |
33 | #endif | |
34 | ||
f0e44959 UD |
35 | |
36 | __BEGIN_DECLS | |
28f540f4 | 37 | |
28f540f4 RM |
38 | /* Macros for converting between `struct timeval' and `struct timespec'. */ |
39 | #define TIMEVAL_TO_TIMESPEC(tv, ts) { \ | |
dbe31b9a RM |
40 | (ts)->tv_sec = (tv)->tv_sec; \ |
41 | (ts)->tv_nsec = (tv)->tv_usec * 1000; \ | |
28f540f4 RM |
42 | } |
43 | #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ | |
dbe31b9a RM |
44 | (tv)->tv_sec = (ts)->tv_sec; \ |
45 | (tv)->tv_usec = (ts)->tv_nsec / 1000; \ | |
28f540f4 RM |
46 | } |
47 | ||
48 | ||
49 | /* Structure crudely representing a timezone. | |
50 | This is obsolete and should never be used. */ | |
51 | struct timezone | |
52 | { | |
53 | int tz_minuteswest; /* Minutes west of GMT. */ | |
54 | int tz_dsttime; /* Nonzero if DST is ever in effect. */ | |
55 | }; | |
56 | ||
0ed99ce4 UD |
57 | #if defined __USE_GNU || defined __USE_BSD |
58 | typedef struct timezone *__timezone_ptr_t; | |
59 | #else | |
60 | typedef void *__timezone_ptr_t; | |
61 | #endif | |
62 | ||
28f540f4 RM |
63 | /* Get the current time of day and timezone information, |
64 | putting it into *TV and *TZ. If TZ is NULL, *TZ is not filled. | |
65 | Returns 0 on success, -1 on errors. | |
66 | NOTE: This form of timezone information is obsolete. | |
67 | Use the functions and variables declared in <time.h> instead. */ | |
0ed99ce4 | 68 | extern int gettimeofday (struct timeval *__tv, __timezone_ptr_t __tz) __THROW; |
28f540f4 RM |
69 | |
70 | /* Set the current time of day and timezone information. | |
71 | This call is restricted to the super-user. */ | |
c1422e5b UD |
72 | extern int settimeofday (__const struct timeval *__tv, |
73 | __const struct timezone *__tz) __THROW; | |
28f540f4 RM |
74 | |
75 | /* Adjust the current time of day by the amount in DELTA. | |
76 | If OLDDELTA is not NULL, it is filled in with the amount | |
77 | of time adjustment remaining to be done from the last `adjtime' call. | |
78 | This call is restricted to the super-user. */ | |
c1422e5b UD |
79 | extern int adjtime (__const struct timeval *__delta, |
80 | struct timeval *__olddelta) __THROW; | |
28f540f4 RM |
81 | |
82 | ||
83 | /* Values for the first argument to `getitimer' and `setitimer'. */ | |
84 | enum __itimer_which | |
85 | { | |
86 | /* Timers run in real time. */ | |
87 | ITIMER_REAL = 0, | |
bc9f6000 | 88 | #define ITIMER_REAL ITIMER_REAL |
28f540f4 RM |
89 | /* Timers run only when the process is executing. */ |
90 | ITIMER_VIRTUAL = 1, | |
bc9f6000 | 91 | #define ITIMER_VIRTUAL ITIMER_VIRTUAL |
28f540f4 RM |
92 | /* Timers run when the process is executing and when |
93 | the system is executing on behalf of the process. */ | |
94 | ITIMER_PROF = 2 | |
bc9f6000 | 95 | #define ITIMER_PROF ITIMER_PROF |
28f540f4 RM |
96 | }; |
97 | ||
98 | /* Type of the second argument to `getitimer' and | |
99 | the second and third arguments `setitimer'. */ | |
100 | struct itimerval | |
101 | { | |
102 | /* Value to put into `it_value' when the timer expires. */ | |
103 | struct timeval it_interval; | |
104 | /* Time to the next timer expiration. */ | |
105 | struct timeval it_value; | |
106 | }; | |
107 | ||
0ed99ce4 UD |
108 | #ifdef __USE_GNU |
109 | typedef enum __itimer_which __itimer_which_t; | |
110 | #else | |
111 | typedef int __itimer_which_t; | |
112 | #endif | |
113 | ||
28f540f4 RM |
114 | /* Set *VALUE to the current setting of timer WHICH. |
115 | Return 0 on success, -1 on errors. */ | |
0ed99ce4 | 116 | extern int getitimer (__itimer_which_t __which, |
c1422e5b | 117 | struct itimerval *__value) __THROW; |
28f540f4 RM |
118 | |
119 | /* Set the timer WHICH to *NEW. If OLD is not NULL, | |
120 | set *OLD to the old value of timer WHICH. | |
121 | Returns 0 on success, -1 on errors. */ | |
0ed99ce4 | 122 | extern int setitimer (__itimer_which_t __which, |
c1422e5b UD |
123 | __const struct itimerval *__new, |
124 | struct itimerval *__old) __THROW; | |
28f540f4 RM |
125 | |
126 | /* Change the access time of FILE to TVP[0] and | |
127 | the modification time of FILE to TVP[1]. */ | |
0ed99ce4 UD |
128 | extern int utimes (__const char *__file, __const struct timeval __tvp[2]) |
129 | __THROW; | |
28f540f4 RM |
130 | |
131 | ||
132 | /* Convenience macros for operations on timevals. | |
133 | NOTE: `timercmp' does not work for >= or <=. */ | |
134 | #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) | |
28f540f4 | 135 | #define timerclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0) |
92777700 RM |
136 | #define timercmp(a, b, CMP) \ |
137 | (((a)->tv_sec == (b)->tv_sec) ? \ | |
138 | ((a)->tv_usec CMP (b)->tv_usec) : \ | |
139 | ((a)->tv_sec CMP (b)->tv_sec)) | |
140 | #define timeradd(a, b, result) \ | |
141 | do { \ | |
142 | (result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \ | |
143 | (result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \ | |
144 | if ((result)->tv_usec >= 1000000) \ | |
145 | { \ | |
146 | ++(result)->tv_sec; \ | |
147 | (result)->tv_usec -= 1000000; \ | |
148 | } \ | |
149 | } while (0) | |
150 | #define timersub(a, b, result) \ | |
151 | do { \ | |
152 | (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ | |
153 | (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ | |
154 | if ((result)->tv_usec < 0) { \ | |
155 | --(result)->tv_sec; \ | |
156 | (result)->tv_usec += 1000000; \ | |
157 | } \ | |
158 | } while (0) | |
28f540f4 | 159 | |
28f540f4 RM |
160 | __END_DECLS |
161 | ||
162 | #endif /* sys/time.h */ |