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