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10a4cc63 | 1 | /* systime.h - System-dependent definitions for time manipulations. |
3a22ee35 | 2 | Copyright (C) 1993, 1994 Free Software Foundation, Inc. |
f469625a JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
f469625a JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
f469625a | 20 | |
fb1b041d DL |
21 | #ifndef EMACS_SYSTIME_H |
22 | #define EMACS_SYSTIME_H | |
482fa053 | 23 | |
d712c26d | 24 | #ifdef TIME_WITH_SYS_TIME |
7b89707c | 25 | #include <sys/time.h> |
f469625a | 26 | #include <time.h> |
d712c26d | 27 | #else |
5cbdb356 JB |
28 | #ifdef HAVE_SYS_TIME_H |
29 | #include <sys/time.h> | |
d712c26d JB |
30 | #else |
31 | #include <time.h> | |
98f77753 | 32 | #endif |
b7cceaf1 | 33 | #endif |
7b89707c | 34 | |
2ffe7ef2 RS |
35 | #ifdef HAVE_TZNAME |
36 | #ifndef tzname /* For SGI. */ | |
37 | extern char *tzname[]; /* RS6000 and others want it this way. */ | |
38 | #endif | |
39 | #endif | |
40 | ||
9e70858b JB |
41 | /* SVr4 doesn't actually declare this in its #include files. */ |
42 | #ifdef USG5_4 | |
482fa053 | 43 | extern time_t timezone; |
9e70858b JB |
44 | #endif |
45 | ||
210b2b4f JB |
46 | #ifdef VMS |
47 | #ifdef VAXC | |
48 | #include "vmstime.h" | |
49 | #endif | |
50 | #endif | |
51 | ||
71068d78 KH |
52 | /* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h |
53 | disagree about the name of the guard symbol. */ | |
c810639a | 54 | #ifdef HPUX |
71068d78 KH |
55 | #ifdef _STRUCT_TIMEVAL |
56 | #ifndef __TIMEVAL__ | |
57 | #define __TIMEVAL__ | |
58 | #endif | |
59 | #endif | |
c810639a | 60 | #endif |
10a4cc63 | 61 | \f |
f469625a JB |
62 | /* EMACS_TIME is the type to use to represent temporal intervals - |
63 | struct timeval on some systems, int on others. It can be passed as | |
88729235 | 64 | the timeout argument to the select system call. |
f469625a JB |
65 | |
66 | EMACS_SECS (TIME) is an rvalue for the seconds component of TIME. | |
67 | EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS. | |
68 | ||
69 | EMACS_HAS_USECS is defined iff EMACS_TIME has a usecs component. | |
7f86bdac JB |
70 | EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME. |
71 | This returns zero if EMACS_TIME doesn't have a microseconds component. | |
72 | EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS. | |
73 | This does nothing if EMACS_TIME doesn't have a microseconds component. | |
f469625a JB |
74 | |
75 | EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME. | |
76 | ||
77 | EMACS_GET_TIME (TIME) stores the current system time in TIME, which | |
78 | should be an lvalue. | |
f469625a JB |
79 | |
80 | EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the | |
81 | result in DEST. SRC should not be negative. | |
82 | ||
83 | EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and | |
177c0ea7 | 84 | stores the result in DEST. SRC should not be negative. |
f469625a JB |
85 | EMACS_TIME_NEG_P (TIME) is true iff TIME is negative. |
86 | ||
87 | */ | |
88 | ||
89 | #ifdef HAVE_TIMEVAL | |
90 | ||
722687f5 JB |
91 | #define EMACS_HAS_USECS |
92 | ||
f469625a JB |
93 | #define EMACS_TIME struct timeval |
94 | #define EMACS_SECS(time) ((time).tv_sec + 0) | |
95 | #define EMACS_USECS(time) ((time).tv_usec + 0) | |
96 | #define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds)) | |
7f86bdac | 97 | #define EMACS_SET_USECS(time, microseconds) ((time).tv_usec = (microseconds)) |
f469625a | 98 | |
4fb83f3c | 99 | /* On SVR4, the compiler may complain if given this extra BSD arg. */ |
af57e5a7 | 100 | #ifdef GETTIMEOFDAY_ONE_ARGUMENT |
f9ee84a3 | 101 | #define EMACS_GET_TIME(time) gettimeofday (&(time)) |
af57e5a7 | 102 | #else /* not GETTIMEOFDAY_ONE_ARGUMENT */ |
97dfd1a1 | 103 | #ifdef HAVE_STRUCT_TIMEZONE |
f9ee84a3 GM |
104 | #define EMACS_GET_TIME(time) \ |
105 | do { \ | |
106 | struct timezone dummy; \ | |
107 | gettimeofday (&(time), &dummy); \ | |
108 | } while (0) | |
97dfd1a1 DL |
109 | #else |
110 | /* Presumably the second arg is ignored. */ | |
111 | #define EMACS_GET_TIME(time) gettimeofday (&(time), NULL) | |
112 | #endif /* HAVE_STRUCT_TIMEZONE */ | |
af57e5a7 | 113 | #endif /* not GETTIMEOFDAY_ONE_ARGUMENT */ |
f469625a | 114 | |
f9ee84a3 GM |
115 | #define EMACS_ADD_TIME(dest, src1, src2) \ |
116 | do { \ | |
117 | (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \ | |
118 | (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \ | |
119 | if ((dest).tv_usec > 1000000) \ | |
120 | (dest).tv_usec -= 1000000, (dest).tv_sec++; \ | |
121 | } while (0) | |
122 | ||
123 | #define EMACS_SUB_TIME(dest, src1, src2) \ | |
124 | do { \ | |
125 | (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \ | |
126 | (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \ | |
127 | if ((dest).tv_usec < 0) \ | |
128 | (dest).tv_usec += 1000000, (dest).tv_sec--; \ | |
129 | } while (0) | |
f469625a JB |
130 | |
131 | #define EMACS_TIME_NEG_P(time) \ | |
cf4138ad | 132 | ((long)(time).tv_sec < 0 \ |
f469625a | 133 | || ((time).tv_sec == 0 \ |
cf4138ad | 134 | && (long)(time).tv_usec < 0)) |
f469625a | 135 | |
10a4cc63 | 136 | #else /* ! defined (HAVE_TIMEVAL) */ |
f469625a JB |
137 | |
138 | #define EMACS_TIME int | |
139 | #define EMACS_SECS(time) (time) | |
ef15f270 | 140 | #define EMACS_USECS(time) 0 |
f469625a | 141 | #define EMACS_SET_SECS(time, seconds) ((time) = (seconds)) |
ef15f270 | 142 | #define EMACS_SET_USECS(time, usecs) 0 |
f469625a JB |
143 | |
144 | #define EMACS_GET_TIME(t) ((t) = time ((long *) 0)) | |
145 | #define EMACS_ADD_TIME(dest, src1, src2) ((dest) = (src1) + (src2)) | |
146 | #define EMACS_SUB_TIME(dest, src1, src2) ((dest) = (src1) - (src2)) | |
147 | #define EMACS_TIME_NEG_P(t) ((t) < 0) | |
148 | ||
10a4cc63 | 149 | #endif /* ! defined (HAVE_TIMEVAL) */ |
f469625a JB |
150 | |
151 | #define EMACS_SET_SECS_USECS(time, secs, usecs) \ | |
152 | (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs)) | |
153 | ||
c8863dae | 154 | extern int set_file_times __P ((const char *, EMACS_TIME, EMACS_TIME)); |
c53a6701 GM |
155 | |
156 | /* Compare times T1 and T2. Value is 0 if T1 and T2 are the same. | |
157 | Value is < 0 if T1 is less than T2. Value is > 0 otherwise. */ | |
158 | ||
159 | #define EMACS_TIME_CMP(T1, T2) \ | |
160 | (EMACS_SECS (T1) - EMACS_SECS (T2) \ | |
161 | + (EMACS_SECS (T1) == EMACS_SECS (T2) \ | |
162 | ? EMACS_USECS (T1) - EMACS_USECS (T2) \ | |
163 | : 0)) | |
164 | ||
165 | /* Compare times T1 and T2 for equality, inequality etc. */ | |
166 | ||
27a9e9b3 GM |
167 | #define EMACS_TIME_EQ(T1, T2) (EMACS_TIME_CMP (T1, T2) == 0) |
168 | #define EMACS_TIME_NE(T1, T2) (EMACS_TIME_CMP (T1, T2) != 0) | |
169 | #define EMACS_TIME_GT(T1, T2) (EMACS_TIME_CMP (T1, T2) > 0) | |
170 | #define EMACS_TIME_GE(T1, T2) (EMACS_TIME_CMP (T1, T2) >= 0) | |
171 | #define EMACS_TIME_LT(T1, T2) (EMACS_TIME_CMP (T1, T2) < 0) | |
172 | #define EMACS_TIME_LE(T1, T2) (EMACS_TIME_CMP (T1, T2) <= 0) | |
c53a6701 | 173 | |
fb1b041d | 174 | #endif /* EMACS_SYSTIME_H */ |
ab5796a9 MB |
175 | |
176 | /* arch-tag: dcb79915-cf99-4bce-9778-aade71d07651 | |
177 | (do not change this comment) */ |