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comparison src/systime.h @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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427:0a0253eac470 428:3ecd8885ac67
1 /* systime.h - System-dependent definitions for time manipulations.
2 Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
3
4 This file is part of XEmacs.
5
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
9 later version.
10
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: FSF 19.30. */
22
23 #ifndef _XEMACS_SYSTIME_H_
24 #define _XEMACS_SYSTIME_H_
25
26 #ifdef TIME_WITH_SYS_TIME
27 #include <sys/time.h>
28 #include <time.h>
29 #else
30 #ifdef HAVE_SYS_TIME_H
31 #include <sys/time.h>
32 #else
33 #include <time.h>
34 #endif
35 #endif
36
37 /* select() is supposed to be (Unix98) defined in sys/time.h,
38 but FreeBSD and Irix 5 put it in unistd.h instead.
39 If we have it, including it can't hurt. */
40 #ifdef HAVE_UNISTD_H
41 #include <unistd.h>
42 #endif
43
44 #if defined(WINDOWSNT) && defined(HAVE_X_WINDOWS)
45 /* Provides gettimeofday etc */
46 #include <X11/Xw32defs.h>
47 #include <X11/Xos.h>
48 #endif
49
50 #ifdef HAVE_UTIME_H
51 # include <utime.h>
52 #endif
53
54 #ifdef HAVE_TZNAME
55 #ifndef tzname /* For SGI. */
56 extern char *tzname[]; /* RS6000 and others want it this way. */
57 #endif
58 #endif
59
60 /* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
61 disagree about the name of the guard symbol. */
62 #ifdef HPUX
63 #ifdef _STRUCT_TIMEVAL
64 #ifndef __TIMEVAL__
65 #define __TIMEVAL__
66 #endif
67 #endif
68 #endif
69
70 /* EMACS_TIME is the type to use to represent temporal intervals.
71 At one point this was 'struct timeval' on some systems, int on others.
72 But this is stupid. Other things than select() code like to
73 manipulate time values, and so microsecond precision should be
74 maintained. Separate typedefs and conversion functions are provided
75 for select().
76
77 EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
78 EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
79
80 EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME.
81 EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS.
82
83 Note that all times are returned in "normalized" format (i.e. the
84 usecs value is in the range 0 <= value < 1000000) and are assumed
85 to be passed in in this format.
86
87 EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME.
88
89 EMACS_GET_TIME (TIME) stores the current system time in TIME, which
90 should be an lvalue.
91
92 set_file_times (PATH, ATIME, MTIME) changes the last-access and
93 last-modification times of the file named PATH to ATIME and
94 MTIME, which are EMACS_TIMEs.
95
96 EMACS_NORMALIZE_TIME (TIME) coerces TIME into normalized format.
97
98 EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the
99 result in DEST. Either or both may be negative.
100
101 EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and
102 stores the result in DEST. Either or both may be negative.
103
104 EMACS_TIME_NEG_P (TIME) is true iff TIME is negative.
105
106 EMACS_TIME_EQUAL (TIME1, TIME2) is true iff TIME1 is the same as TIME2.
107 EMACS_TIME_GREATER (TIME1, TIME2) is true iff TIME1 is greater than
108 TIME2.
109 EMACS_TIME_EQUAL_OR_GREATER (TIME1, TIME2) is true iff TIME1 is
110 greater than or equal to TIME2.
111
112 */
113
114 #ifdef HAVE_TIMEVAL
115
116 #define EMACS_SELECT_TIME struct timeval
117 #define EMACS_TIME_TO_SELECT_TIME(time, select_time) ((select_time) = (time))
118
119 #else /* not HAVE_TIMEVAL */
120
121 struct timeval
122 {
123 long tv_sec; /* seconds */
124 long tv_usec; /* microseconds */
125 };
126
127 #define EMACS_SELECT_TIME int
128 #define EMACS_TIME_TO_SELECT_TIME(time, select_time) \
129 EMACS_TIME_TO_INT (time, select_time)
130
131 #endif /* not HAVE_TIMEVAL */
132
133 #define EMACS_TIME_TO_INT(time, intvar) \
134 do { \
135 EMACS_TIME tmptime = time; \
136 \
137 if (tmptime.tv_usec > 0) \
138 (intvar) = tmptime.tv_sec + 1; \
139 else \
140 (intvar) = tmptime.tv_sec; \
141 } while (0)
142
143 #define EMACS_TIME struct timeval
144 #define EMACS_SECS(time) ((time).tv_sec + 0)
145 #define EMACS_USECS(time) ((time).tv_usec + 0)
146 #define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds))
147 #define EMACS_SET_USECS(time, microseconds) ((time).tv_usec = (microseconds))
148
149 #if !defined (HAVE_GETTIMEOFDAY)
150 struct timezone;
151 int gettimeofday (struct timeval *, struct timezone *);
152 #endif
153
154 /* On SVR4, the compiler may complain if given this extra BSD arg. */
155 #ifdef GETTIMEOFDAY_ONE_ARGUMENT
156 # ifdef SOLARIS2
157 /* Solaris (at least) omits this prototype. IRIX5 has it and chokes if we
158 declare it here. */
159 int gettimeofday (struct timeval *);
160 # endif
161 /* According to the Xt sources, some NTP daemons on some systems may
162 return non-normalized values. */
163 #define EMACS_GET_TIME(time) \
164 do { \
165 gettimeofday (&(time)); \
166 EMACS_NORMALIZE_TIME (time); \
167 } while (0)
168 #else /* not GETTIMEOFDAY_ONE_ARGUMENT */
169 # ifdef SOLARIS2
170 /* Solaris doesn't provide any prototype of this unless a bunch of
171 crap we don't define are defined. */
172 int gettimeofday (struct timeval *, void *dummy);
173 # endif
174 #define EMACS_GET_TIME(time) \
175 do { \
176 struct timezone dummy; \
177 gettimeofday (&(time), &dummy); \
178 EMACS_NORMALIZE_TIME (time); \
179 } while (0)
180 #endif /* not GETTIMEOFDAY_ONE_ARGUMENT */
181
182 #define EMACS_NORMALIZE_TIME(time) \
183 do { \
184 while ((time).tv_usec >= 1000000) \
185 { \
186 (time).tv_usec -= 1000000; \
187 (time).tv_sec++; \
188 } \
189 while ((time).tv_usec < 0) \
190 { \
191 (time).tv_usec += 1000000; \
192 (time).tv_sec--; \
193 } \
194 } while (0)
195
196 #define EMACS_ADD_TIME(dest, src1, src2) \
197 do { \
198 (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \
199 (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \
200 EMACS_NORMALIZE_TIME (dest); \
201 } while (0)
202
203 #define EMACS_SUB_TIME(dest, src1, src2) \
204 do { \
205 (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \
206 (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \
207 EMACS_NORMALIZE_TIME (dest); \
208 } while (0)
209
210 #define EMACS_TIME_NEG_P(time) ((long)(time).tv_sec < 0)
211
212 #define EMACS_TIME_EQUAL(time1, time2) \
213 ((time1).tv_sec == (time2).tv_sec && \
214 (time1).tv_usec == (time2).tv_usec)
215
216 #define EMACS_TIME_GREATER(time1, time2) \
217 ((time1).tv_sec > (time2).tv_sec || \
218 ((time1).tv_sec == (time2).tv_sec && \
219 (time1).tv_usec > (time2).tv_usec))
220
221 #define EMACS_TIME_EQUAL_OR_GREATER(time1, time2) \
222 ((time1).tv_sec > (time2).tv_sec || \
223 ((time1).tv_sec == (time2).tv_sec && \
224 (time1).tv_usec >= (time2).tv_usec))
225
226 #define EMACS_SET_SECS_USECS(time, secs, usecs) \
227 (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
228
229 int set_file_times (char *filename, EMACS_TIME atime, EMACS_TIME mtime);
230
231 void get_process_times (double *user_time, double *system_time,
232 double *real_time);
233
234 #if defined(WINDOWSNT) || defined(BROKEN_CYGWIN) || defined(__MINGW32__)
235
236 /* setitimer emulation for Win32 (see nt.c) */
237
238 struct itimerval
239 {
240 struct timeval it_value;
241 struct timeval it_interval;
242 };
243
244 int setitimer (int kind, const struct itimerval* itnew,
245 struct itimerval* itold);
246
247 #define ITIMER_REAL 1
248 #define ITIMER_PROF 2
249
250 #endif /* WINDOWSNT */
251
252 #endif /* _XEMACS_SYSTIME_H_ */