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comparison src/systime.h @ 0:376386a54a3c r19-14

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Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
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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 #ifdef HAVE_UTIME_H
38 # include <utime.h>
39 #endif
40
41 #ifdef HAVE_TZNAME
42 #ifndef tzname /* For SGI. */
43 extern char *tzname[]; /* RS6000 and others want it this way. */
44 #endif
45 #endif
46
47 /* SVr4 doesn't actually declare this in its #include files. */
48 #ifdef USG5_4
49 extern long timezone;
50 #endif
51
52 #ifdef VMS
53 #ifdef VAXC
54 #include "vmstime.h"
55 #endif
56 #endif
57
58 /* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
59 disagree about the name of the guard symbol. */
60 #ifdef HPUX
61 #ifdef _STRUCT_TIMEVAL
62 #ifndef __TIMEVAL__
63 #define __TIMEVAL__
64 #endif
65 #endif
66 #endif
67
68 /* EMACS_TIME is the type to use to represent temporal intervals.
69 At one point this was 'struct timeval' on some systems, int on others.
70 But this is stupid. Other things than select() code like to
71 manipulate time values, and so microsecond precision should be
72 maintained. Separate typedefs and conversion functions are provided
73 for select().
74
75 EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
76 EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
77
78 EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME.
79 EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS.
80
81 Note that all times are returned in "normalized" format (i.e. the
82 usecs value is in the range 0 <= value < 1000000) and are assumed
83 to be passed in in this format.
84
85 EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME.
86
87 EMACS_GET_TIME (TIME) stores the current system time in TIME, which
88 should be an lvalue.
89
90 set_file_times (PATH, ATIME, MTIME) changes the last-access and
91 last-modification times of the file named PATH to ATIME and
92 MTIME, which are EMACS_TIMEs.
93
94 EMACS_NORMALIZE_TIME (TIME) coerces TIME into normalized format.
95
96 EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the
97 result in DEST. Either or both may be negative.
98
99 EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and
100 stores the result in DEST. Either or both may be negative.
101
102 EMACS_TIME_NEG_P (TIME) is true iff TIME is negative.
103
104 EMACS_TIME_EQUAL (TIME1, TIME2) is true iff TIME1 is the same as TIME2.
105 EMACS_TIME_GREATER (TIME1, TIME2) is true iff TIME1 is greater than
106 TIME2.
107 EMACS_TIME_EQUAL_OR_GREATER (TIME1, TIME2) is true iff TIME1 is
108 greater than or equal to TIME2.
109
110 */
111
112 #ifdef HAVE_TIMEVAL
113
114 #define EMACS_SELECT_TIME struct timeval
115 #define EMACS_TIME_TO_SELECT_TIME(time, select_time) ((select_time) = (time))
116
117 #else /* not HAVE_TIMEVAL */
118
119 struct timeval
120 {
121 long tv_sec; /* seconds */
122 long tv_usec; /* microseconds */
123 };
124
125 #define EMACS_SELECT_TIME int
126 #define EMACS_TIME_TO_SELECT_TIME(time, select_time) \
127 EMACS_TIME_TO_INT (time, select_time)
128
129 #endif /* not HAVE_TIMEVAL */
130
131 #define EMACS_TIME_TO_INT(time, intvar) \
132 do { \
133 EMACS_TIME tmptime = time; \
134 \
135 if (tmptime.tv_usec > 0) \
136 (intvar) = tmptime.tv_sec + 1; \
137 else \
138 (intvar) = tmptime.tv_sec; \
139 } while (0)
140
141 #define EMACS_TIME struct timeval
142 #define EMACS_SECS(time) ((time).tv_sec + 0)
143 #define EMACS_USECS(time) ((time).tv_usec + 0)
144 #define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds))
145 #define EMACS_SET_USECS(time, microseconds) ((time).tv_usec = (microseconds))
146
147 #if !defined (HAVE_GETTIMEOFDAY)
148 struct timezone;
149 extern int gettimeofday (struct timeval *, struct timezone *);
150 #endif
151
152 /* On SVR4, the compiler may complain if given this extra BSD arg. */
153 #ifdef GETTIMEOFDAY_ONE_ARGUMENT
154 # ifdef SOLARIS2
155 /* Solaris (at least) omits this prototype. IRIX5 has it and chokes if we
156 declare it here. */
157 extern int gettimeofday (struct timeval *);
158 # endif
159 /* According to the Xt sources, some NTP daemons on some systems may
160 return non-normalized values. */
161 #define EMACS_GET_TIME(time) \
162 do { \
163 gettimeofday (&(time)); \
164 EMACS_NORMALIZE_TIME (time); \
165 } while (0)
166 #else /* not GETTIMEOFDAY_ONE_ARGUMENT */
167 # ifdef SOLARIS2
168 /* Solaris doesn't provide any prototype of this unless a bunch of
169 crap we don't define are defined. */
170 extern int gettimeofday (struct timeval *, void *dummy);
171 # endif
172 #define EMACS_GET_TIME(time) \
173 do { \
174 struct timezone dummy; \
175 gettimeofday (&(time), &dummy); \
176 EMACS_NORMALIZE_TIME (time); \
177 } while (0)
178 #endif /* not GETTIMEOFDAY_ONE_ARGUMENT */
179
180 #define EMACS_NORMALIZE_TIME(time) \
181 do { \
182 while ((time).tv_usec >= 1000000) \
183 { \
184 (time).tv_usec -= 1000000; \
185 (time).tv_sec++; \
186 } \
187 while ((time).tv_usec < 0) \
188 { \
189 (time).tv_usec += 1000000; \
190 (time).tv_sec--; \
191 } \
192 } while (0)
193
194 #define EMACS_ADD_TIME(dest, src1, src2) \
195 do { \
196 (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \
197 (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \
198 EMACS_NORMALIZE_TIME (dest); \
199 } while (0)
200
201 #define EMACS_SUB_TIME(dest, src1, src2) \
202 do { \
203 (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \
204 (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \
205 EMACS_NORMALIZE_TIME (dest); \
206 } while (0)
207
208 #define EMACS_TIME_NEG_P(time) ((long)(time).tv_sec < 0)
209
210 #define EMACS_TIME_EQUAL(time1, time2) \
211 ((time1).tv_sec == (time2).tv_sec && \
212 (time1).tv_usec == (time2).tv_usec)
213
214 #define EMACS_TIME_GREATER(time1, time2) \
215 ((time1).tv_sec > (time2).tv_sec || \
216 ((time1).tv_sec == (time2).tv_sec && \
217 (time1).tv_usec > (time2).tv_usec))
218
219 #define EMACS_TIME_EQUAL_OR_GREATER(time1, time2) \
220 ((time1).tv_sec > (time2).tv_sec || \
221 ((time1).tv_sec == (time2).tv_sec && \
222 (time1).tv_usec >= (time2).tv_usec))
223
224 #define EMACS_SET_SECS_USECS(time, secs, usecs) \
225 (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
226
227 extern int set_file_times (char *filename, EMACS_TIME atime, EMACS_TIME mtime);
228
229 extern void get_process_times (double *user_time, double *system_time,
230 double *real_time);
231
232 #endif /* _XEMACS_SYSTIME_H_ */