1 /* systime.h - System-dependent definitions for time manipulations.
2 Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
4 This file is part of XEmacs.
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
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
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. */
21 /* Synched up with: FSF 19.30. */
23 #ifndef _XEMACS_SYSTIME_H_
24 #define _XEMACS_SYSTIME_H_
26 #ifdef TIME_WITH_SYS_TIME
30 #ifdef HAVE_SYS_TIME_H
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. */
44 #if defined(WINDOWSNT) && defined(HAVE_X_WINDOWS)
45 /* Provides gettimeofday etc */
46 #include <X11/Xw32defs.h>
55 #ifndef tzname /* For SGI. */
56 extern char *tzname[]; /* RS6000 and others want it this way. */
60 /* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
61 disagree about the name of the guard symbol. */
63 #ifdef _STRUCT_TIMEVAL
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
77 EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
78 EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
80 EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME.
81 EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS.
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.
87 EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME.
89 EMACS_GET_TIME (TIME) stores the current system time in TIME, which
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.
96 EMACS_NORMALIZE_TIME (TIME) coerces TIME into normalized format.
98 EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the
99 result in DEST. Either or both may be negative.
101 EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and
102 stores the result in DEST. Either or both may be negative.
104 EMACS_TIME_NEG_P (TIME) is true iff TIME is negative.
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
109 EMACS_TIME_EQUAL_OR_GREATER (TIME1, TIME2) is true iff TIME1 is
110 greater than or equal to TIME2.
116 #define EMACS_SELECT_TIME struct timeval
117 #define EMACS_TIME_TO_SELECT_TIME(time, select_time) ((select_time) = (time))
119 #else /* not HAVE_TIMEVAL */
123 long tv_sec; /* seconds */
124 long tv_usec; /* microseconds */
127 #define EMACS_SELECT_TIME int
128 #define EMACS_TIME_TO_SELECT_TIME(time, select_time) \
129 EMACS_TIME_TO_INT (time, select_time)
131 #endif /* not HAVE_TIMEVAL */
133 #define EMACS_TIME_TO_INT(time, intvar) \
135 EMACS_TIME tmptime = time; \
137 if (tmptime.tv_usec > 0) \
138 (intvar) = tmptime.tv_sec + 1; \
140 (intvar) = tmptime.tv_sec; \
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))
149 #if !defined (HAVE_GETTIMEOFDAY)
151 int gettimeofday (struct timeval *, struct timezone *);
154 /* On SVR4, the compiler may complain if given this extra BSD arg. */
155 #ifdef GETTIMEOFDAY_ONE_ARGUMENT
157 /* Solaris (at least) omits this prototype. IRIX5 has it and chokes if we
159 int gettimeofday (struct timeval *);
161 /* According to the Xt sources, some NTP daemons on some systems may
162 return non-normalized values. */
163 #define EMACS_GET_TIME(time) \
165 gettimeofday (&(time)); \
166 EMACS_NORMALIZE_TIME (time); \
168 #else /* not GETTIMEOFDAY_ONE_ARGUMENT */
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);
174 #define EMACS_GET_TIME(time) \
176 struct timezone dummy; \
177 gettimeofday (&(time), &dummy); \
178 EMACS_NORMALIZE_TIME (time); \
180 #endif /* not GETTIMEOFDAY_ONE_ARGUMENT */
182 #define EMACS_NORMALIZE_TIME(time) \
184 while ((time).tv_usec >= 1000000) \
186 (time).tv_usec -= 1000000; \
189 while ((time).tv_usec < 0) \
191 (time).tv_usec += 1000000; \
196 #define EMACS_ADD_TIME(dest, src1, src2) \
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); \
203 #define EMACS_SUB_TIME(dest, src1, src2) \
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); \
210 #define EMACS_TIME_NEG_P(time) ((long)(time).tv_sec < 0)
212 #define EMACS_TIME_EQUAL(time1, time2) \
213 ((time1).tv_sec == (time2).tv_sec && \
214 (time1).tv_usec == (time2).tv_usec)
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))
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))
226 #define EMACS_SET_SECS_USECS(time, secs, usecs) \
227 (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
229 int set_file_times (char *filename, EMACS_TIME atime, EMACS_TIME mtime);
231 void get_process_times (double *user_time, double *system_time,
234 #if defined(WINDOWSNT) || defined(BROKEN_CYGWIN) || defined(__MINGW32__)
236 /* setitimer emulation for Win32 (see nt.c) */
240 struct timeval it_value;
241 struct timeval it_interval;
244 int setitimer (int kind, const struct itimerval* itnew,
245 struct itimerval* itold);
247 #define ITIMER_REAL 1
248 #define ITIMER_PROF 2
250 #endif /* WINDOWSNT */
252 #endif /* _XEMACS_SYSTIME_H_ */