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  • only in /asuswrt-rt-n18u-9.0.0.4.380.2695/release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/usr/include/sys/
1/* Copyright (C) 1991-1994,1996-2003,2005,2006,2009
2	Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public
7   License as published by the Free Software Foundation; either
8   version 2.1 of the License, or (at your option) any later version.
9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, write to the Free
17   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18   02111-1307 USA.  */
19
20#ifndef _SYS_TIME_H
21#define _SYS_TIME_H	1
22
23#include <features.h>
24
25#include <bits/types.h>
26#define __need_time_t
27#include <time.h>
28#define __need_timeval
29#include <bits/time.h>
30
31#include <sys/select.h>
32
33#ifndef __suseconds_t_defined
34typedef __suseconds_t suseconds_t;
35# define __suseconds_t_defined
36#endif
37
38
39__BEGIN_DECLS
40
41#ifdef __USE_GNU
42/* Macros for converting between `struct timeval' and `struct timespec'.  */
43# define TIMEVAL_TO_TIMESPEC(tv, ts) {                                   \
44        (ts)->tv_sec = (tv)->tv_sec;                                    \
45        (ts)->tv_nsec = (tv)->tv_usec * 1000;                           \
46}
47# define TIMESPEC_TO_TIMEVAL(tv, ts) {                                   \
48        (tv)->tv_sec = (ts)->tv_sec;                                    \
49        (tv)->tv_usec = (ts)->tv_nsec / 1000;                           \
50}
51#endif
52
53
54#ifdef __USE_BSD
55/* Structure crudely representing a timezone.
56   This is obsolete and should never be used.  */
57struct timezone
58  {
59    int tz_minuteswest;		/* Minutes west of GMT.  */
60    int tz_dsttime;		/* Nonzero if DST is ever in effect.  */
61  };
62
63typedef struct timezone *__restrict __timezone_ptr_t;
64#else
65typedef void *__restrict __timezone_ptr_t;
66#endif
67
68/* Get the current time of day and timezone information,
69   putting it into *TV and *TZ.  If TZ is NULL, *TZ is not filled.
70   Returns 0 on success, -1 on errors.
71   NOTE: This form of timezone information is obsolete.
72   Use the functions and variables declared in <time.h> instead.  */
73extern int gettimeofday (struct timeval *__restrict __tv,
74			 __timezone_ptr_t __tz) __THROW __nonnull ((1));
75
76#ifdef __USE_BSD
77/* Set the current time of day and timezone information.
78   This call is restricted to the super-user.  */
79extern int settimeofday (__const struct timeval *__tv,
80			 __const struct timezone *__tz)
81     __THROW __nonnull ((1));
82
83/* Adjust the current time of day by the amount in DELTA.
84   If OLDDELTA is not NULL, it is filled in with the amount
85   of time adjustment remaining to be done from the last `adjtime' call.
86   This call is restricted to the super-user.  */
87/* gracecsm */
88#define __adjtimex(ntx) adjtimex((ntx))
89
90extern int adjtime (__const struct timeval *__delta,
91		    struct timeval *__olddelta) __THROW;
92#endif
93
94
95/* Values for the first argument to `getitimer' and `setitimer'.  */
96enum __itimer_which
97  {
98    /* Timers run in real time.  */
99    ITIMER_REAL = 0,
100#define ITIMER_REAL ITIMER_REAL
101    /* Timers run only when the process is executing.  */
102    ITIMER_VIRTUAL = 1,
103#define ITIMER_VIRTUAL ITIMER_VIRTUAL
104    /* Timers run when the process is executing and when
105       the system is executing on behalf of the process.  */
106    ITIMER_PROF = 2
107#define ITIMER_PROF ITIMER_PROF
108  };
109
110/* Type of the second argument to `getitimer' and
111   the second and third arguments `setitimer'.  */
112struct itimerval
113  {
114    /* Value to put into `it_value' when the timer expires.  */
115    struct timeval it_interval;
116    /* Time to the next timer expiration.  */
117    struct timeval it_value;
118  };
119
120#if defined __USE_GNU && !defined __cplusplus
121/* Use the nicer parameter type only in GNU mode and not for C++ since the
122   strict C++ rules prevent the automatic promotion.  */
123typedef enum __itimer_which __itimer_which_t;
124#else
125typedef int __itimer_which_t;
126#endif
127
128/* Set *VALUE to the current setting of timer WHICH.
129   Return 0 on success, -1 on errors.  */
130extern int getitimer (__itimer_which_t __which,
131		      struct itimerval *__value) __THROW;
132
133/* Set the timer WHICH to *NEW.  If OLD is not NULL,
134   set *OLD to the old value of timer WHICH.
135   Returns 0 on success, -1 on errors.  */
136extern int setitimer (__itimer_which_t __which,
137		      __const struct itimerval *__restrict __new,
138		      struct itimerval *__restrict __old) __THROW;
139
140/* Change the access time of FILE to TVP[0] and the modification time of
141   FILE to TVP[1].  If TVP is a null pointer, use the current time instead.
142   Returns 0 on success, -1 on errors.  */
143extern int utimes (__const char *__file, __const struct timeval __tvp[2])
144     __THROW __nonnull ((1));
145
146#ifdef __USE_BSD
147/* Same as `utimes', but does not follow symbolic links.  */
148extern int lutimes (__const char *__file, __const struct timeval __tvp[2])
149     __THROW __nonnull ((1));
150
151#if 0
152/* Same as `utimes', but takes an open file descriptor instead of a name.  */
153extern int futimes (int __fd, __const struct timeval __tvp[2]) __THROW;
154#endif
155#endif
156
157#ifdef __USE_GNU
158/* Change the access time of FILE relative to FD to TVP[0] and the
159   modification time of FILE to TVP[1].  If TVP is a null pointer, use
160   the current time instead.  Returns 0 on success, -1 on errors.  */
161extern int futimesat (int __fd, __const char *__file,
162		      __const struct timeval __tvp[2]) __THROW;
163#endif
164
165
166#ifdef __USE_BSD
167/* Convenience macros for operations on timevals.
168   NOTE: `timercmp' does not work for >= or <=.  */
169# define timerisset(tvp)	((tvp)->tv_sec || (tvp)->tv_usec)
170# define timerclear(tvp)	((tvp)->tv_sec = (tvp)->tv_usec = 0)
171# define timercmp(a, b, CMP) 						      \
172  (((a)->tv_sec == (b)->tv_sec) ? 					      \
173   ((a)->tv_usec CMP (b)->tv_usec) : 					      \
174   ((a)->tv_sec CMP (b)->tv_sec))
175# define timeradd(a, b, result)						      \
176  do {									      \
177    (result)->tv_sec = (a)->tv_sec + (b)->tv_sec;			      \
178    (result)->tv_usec = (a)->tv_usec + (b)->tv_usec;			      \
179    if ((result)->tv_usec >= 1000000)					      \
180      {									      \
181	++(result)->tv_sec;						      \
182	(result)->tv_usec -= 1000000;					      \
183      }									      \
184  } while (0)
185# define timersub(a, b, result)						      \
186  do {									      \
187    (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;			      \
188    (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;			      \
189    if ((result)->tv_usec < 0) {					      \
190      --(result)->tv_sec;						      \
191      (result)->tv_usec += 1000000;					      \
192    }									      \
193  } while (0)
194#endif	/* BSD */
195
196__END_DECLS
197
198#endif /* sys/time.h */
199