annotate src/systime.h @ 1315:70921960b980

[xemacs-hg @ 2003-02-20 08:19:28 by ben] check in makefile fixes et al Makefile.in.in: Major surgery. Move all stuff related to building anything in the src/ directory into src/. Simplify the dependencies -- everything in src/ is dependent on the single entry `src' in MAKE_SUBDIRS. Remove weirdo targets like `all-elc[s]', dump-elc[s], etc. mule/mule-msw-init.el: Removed. Delete this file. mule/mule-win32-init.el: New file, with stuff from mule-msw-init.el -- not just for MS Windows native, boys and girls! bytecomp.el: Change code inserted to catch trying to load a Mule-only .elc file in a non-Mule XEmacs. Formerly you got the rather cryptic "The required feature `mule' cannot be provided". Now you get "Loading this file requires Mule support". finder.el: Remove dependency on which directory this function is invoked from. update-elc.el: Don't mess around with ../src/BYTECOMPILE_CHANGE. Now that Makefile.in.in and xemacs.mak are in sync, both of them use NEEDTODUMP and the other one isn't used. dumped-lisp.el: Rewrite in terms of `list' and `nconc' instead of assemble-list, so we can have arbitrary forms, not just `when-feature'. very-early-lisp.el: Nuke this file. finder-inf.el, packages.el, update-elc.el, update-elc-2.el, loadup.el, make-docfile.el: Eliminate references to very-early-lisp. msw-glyphs.el: Comment clarification. xemacs.mak: Add macros DO_TEMACS, DO_XEMACS, and a few others; this macro section is now completely in sync with src/Makefile.in.in. Copy check-features, load-shadows, and rebuilding finder-inf.el from src/Makefile.in.in. The main build/dump/recompile process is now synchronized with src/Makefile.in.in. Change `WARNING' to `NOTE' and `error checking' to `error-checking' TO avoid tripping faux warnings and errors in the VC++ IDE. Makefile.in.in: Major surgery. Move all stuff related to building anything in the src/ directory from top-level Makefile.in.in to here. Simplify the dependencies. Rearrange into logical subsections. Synchronize the main compile/dump/build-elcs section with xemacs.mak, which is already clean and in good working order. Remove weirdo targets like `all-elc[s]', dump-elc[s], etc. Add additional levels of macros \(e.g. DO_TEMACS, DO_XEMACS, TEMACS_BATCH, XEMACS_BATCH, XEMACS_BATCH_PACKAGES) to factor out duplicated stuff. Clean up handling of "HEAP_IN_DATA" (Cygwin) so it doesn't need to ignore the return value from dumping. Add .NO_PARALLEL since various aspects of building and dumping must be serialized but do not always have dependencies between them (this is impossible in some cases). Everything related to src/ now gets built in one pass in this directory by just running `make' (except the Makefiles themselves and config.h, paths.h, Emacs.ad.h, and other generated .h files). console.c: Update list of possibly valid console types. emacs.c: Rationalize the specifying and handling of the type of the first frame. This was originally prompted by a workspace in which I got GTK to compile under C++ and in the process fixed it so it could coexist with X in the same build -- hence, a combined TTY/X/MS-Windows/GTK build is now possible under Cygwin. (However, you can't simultaneously *display* more than one kind of device connection -- but getting that to work is not that difficult. Perhaps a project for a bored grad student. I (ben) would do it but don't see the use.) To make sense of this, I added new switches that can be used to specifically indicate the window system: -x [aka --use-x], -tty \[aka --use-tty], -msw [aka --use-ms-windows], -gtk [aka --use-gtk], and -gnome [aka --use-gnome, same as --use-gtk]. -nw continues as an alias for -tty. When none have been given, XEmacs checks for other parameters implying particular device types (-t -> tty, -display -> x [or should it have same treatment as DISPLAY below?]), and has ad-hoc logic afterwards: if env var DISPLAY is set, use x (or gtk? perhaps should check whether gnome is running), else MS Windows if it exsits, else TTY if it exists, else stream, and you must be running in batch mode. This also fixes an existing bug whereby compiling with no x, no mswin, no tty, when running non- interactively (e.g. to dump) I get "sorry, must have TTY support". emacs.c: Turn on Vstack_trace_on_error so that errors are debuggable even when occurring extremely early in reinitialization. emacs.c: Try to make sure that the user can see message output under Windows (i.e. it doesn't just disappear right away) regardless of when it occurs, e.g. in the middle of creating the first frame. emacs.c: Define new function `emacs-run-status', indicating whether XEmacs is noninteractive or interactive, whether raw, post-dump/pdump-load or run-temacs, whether we are dumping, whether pdump is in effect. event-stream.c: It's "mommas are fat", not "momas are fat". Fix other typo. event-stream.c: Conditionalize in_menu_callback check on HAVE_MENUBARS, because it won't exist on w/o menubar support, lisp.h: More hackery on RETURN_NOT_REACHED. Cygwin v3.2 DOES complain here if RETURN_NOT_REACHED() is blank, as it is for GCC 2.5+. So make it blank only for GCC 2.5 through 2.999999999999999. Declare Vstack_trace_on_error. profile.c: Need to include "profile.h" to fix warnings. sheap.c: Don't fatal() when need to rerun Make, just stderr_out() and exit(0). That way we can distinguish between a dumping failing expectedly (due to lack of stack space, triggering another dump) and unexpectedly, in which case, we want to stop building. (or go on, if -K is given) syntax.c, syntax.h: Use ints where they belong, and enum syntaxcode's where they belong, and fix warnings thereby. syntax.h: Fix crash caused by an edge condition in the syntax-cache macros. text.h: Spacing fixes. xmotif.h: New file, to get around shadowing warnings. EmacsManager.c, event-Xt.c, glyphs-x.c, gui-x.c, input-method-motif.c, xmmanagerp.h, xmprimitivep.h: Include xmotif.h. alloc.c: Conditionalize in_malloc on ERROR_CHECK_MALLOC. config.h.in, file-coding.h, fileio.c, getloadavg.c, select-x.c, signal.c, sysdep.c, sysfile.h, systime.h, text.c, unicode.c: Eliminate HAVE_WIN32_CODING_SYSTEMS, use WIN32_ANY instead. Replace defined (WIN32_NATIVE) || defined (CYGWIN) with WIN32_ANY. lisp.h: More futile attempts to walk and chew gum at the same time when dealing with subr's that don't return.
author ben
date Thu, 20 Feb 2003 08:19:44 +0000
parents 804517e16990
children facf3239ba30
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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 Copyright (C) 2001, 2002 Ben Wing.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.30. */
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23
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24 #ifndef INCLUDED_systime_h_
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25 #define INCLUDED_systime_h_
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27 #ifdef TIME_WITH_SYS_TIME
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28 # include <sys/time.h>
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29 # include <time.h>
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30 #else
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31 # ifdef HAVE_SYS_TIME_H
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32 # include <sys/time.h>
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33 # else
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34 # include <time.h>
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35 # endif
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36 #endif
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37
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38 #ifdef HAVE_SYS_TIMES_H
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39 /* Need this for struct tms */
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40 # include <sys/times.h>
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41 #endif
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42
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43 /* select() is supposed to be (Unix98) defined in sys/time.h,
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44 but FreeBSD and Irix 5 put it in unistd.h instead.
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45 If we have it, including it can't hurt. */
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46 #ifdef HAVE_UNISTD_H
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47 #include <unistd.h>
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48 #endif
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49
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50 #ifdef WIN32_NATIVE
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51
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52 /* This defines struct timeval */
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53 #include <winsock.h>
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54
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55 struct timezone
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56 {
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57 int tz_minuteswest; /* minutes west of Greenwich */
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58 int tz_dsttime; /* type of dst correction */
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59 };
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60
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61 #ifdef HAVE_X_WINDOWS
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62 /* Provides gettimeofday etc */
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63 #include <X11/Xw32defs.h>
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64 #include <X11/Xos.h>
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65 #else
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66 /* X11R6 on NT provides the single parameter version of this command */
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67 void gettimeofday (struct timeval *, struct timezone *);
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68 #endif /* HAVE_X_WINDOWS */
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70 #endif /* WIN32_NATIVE */
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72 /* struct utimbuf */
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73
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74 #ifdef HAVE_UTIME
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75 # include <utime.h>
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76 #endif
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78 #ifdef WIN32_NATIVE
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79 # include <sys/utime.h>
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80 #ifdef emacs
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81 int mswindows_utime (Lisp_Object path, struct utimbuf *thymes);
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82 #endif
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83 #endif
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84
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85 #if defined(HAVE_TZNAME) && !defined(WIN32_NATIVE) && !defined(CYGWIN)
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86 #ifndef tzname /* For SGI. */
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87 extern char *tzname[]; /* RS6000 and others want it this way. */
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88 #endif
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89 #endif
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90
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91 /* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
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92 disagree about the name of the guard symbol. */
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93 #ifdef HPUX
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94 #ifdef _STRUCT_TIMEVAL
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95 #ifndef __TIMEVAL__
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96 #define __TIMEVAL__
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97 #endif
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98 #endif
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99 #endif
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100
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101 /* EMACS_TIME is the type to use to represent temporal intervals.
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102 At one point this was 'struct timeval' on some systems, int on others.
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103 But this is stupid. Other things than select() code like to
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104 manipulate time values, and so microsecond precision should be
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105 maintained. Separate typedefs and conversion functions are provided
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106 for select().
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107
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108 EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
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109 EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
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110
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111 EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME.
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112 EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS.
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113
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114 Note that all times are returned in "normalized" format (i.e. the
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115 usecs value is in the range 0 <= value < 1000000) and are assumed
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116 to be passed in in this format.
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117
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118 EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME.
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119
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120 EMACS_GET_TIME (TIME) stores the current system time in TIME, which
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121 should be an lvalue.
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122
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123 set_file_times (PATH, ATIME, MTIME) changes the last-access and
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124 last-modification times of the file named PATH to ATIME and
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125 MTIME, which are EMACS_TIMEs.
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126
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127 EMACS_NORMALIZE_TIME (TIME) coerces TIME into normalized format.
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128
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129 EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the
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130 result in DEST. Either or both may be negative.
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131
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132 EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and
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133 stores the result in DEST. Either or both may be negative.
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134
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135 EMACS_TIME_NEG_P (TIME) is true iff TIME is negative.
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136
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137 EMACS_TIME_EQUAL (TIME1, TIME2) is true iff TIME1 is the same as TIME2.
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138 EMACS_TIME_GREATER (TIME1, TIME2) is true iff TIME1 is greater than
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139 TIME2.
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140 EMACS_TIME_EQUAL_OR_GREATER (TIME1, TIME2) is true iff TIME1 is
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141 greater than or equal to TIME2.
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142
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143 */
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144
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145 #ifdef HAVE_TIMEVAL
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146
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147 #define EMACS_SELECT_TIME struct timeval
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148 #define EMACS_TIME_TO_SELECT_TIME(time, select_time) ((select_time) = (time))
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149
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150 #else /* not HAVE_TIMEVAL */
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151
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152 struct timeval
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153 {
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154 long tv_sec; /* seconds */
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155 long tv_usec; /* microseconds */
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156 };
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157
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158 #define EMACS_SELECT_TIME int
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159 #define EMACS_TIME_TO_SELECT_TIME(time, select_time) \
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160 EMACS_TIME_TO_INT (time, select_time)
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161
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162 #endif /* not HAVE_TIMEVAL */
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163
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164 #define EMACS_TIME_TO_INT(time, intvar) \
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165 do { \
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166 EMACS_TIME tmptime = time; \
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167 \
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168 if (tmptime.tv_usec > 0) \
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169 (intvar) = tmptime.tv_sec + 1; \
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170 else \
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171 (intvar) = tmptime.tv_sec; \
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172 } while (0)
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173
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174 #define EMACS_TIME struct timeval
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175 #define EMACS_SECS(time) ((time).tv_sec + 0)
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176 #define EMACS_USECS(time) ((time).tv_usec + 0)
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177 #define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds))
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178 #define EMACS_SET_USECS(time, microseconds) ((time).tv_usec = (microseconds))
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179
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180 #if !defined (HAVE_GETTIMEOFDAY)
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181 int gettimeofday (struct timeval *, void *);
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182 #endif
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183
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184 /* On SVR4, the compiler may complain if given this extra BSD arg. */
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185 #ifdef GETTIMEOFDAY_ONE_ARGUMENT
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186 #define EMACS_GETTIMEOFDAY(time) gettimeofday(time)
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187 #else
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188 #define EMACS_GETTIMEOFDAY(time) gettimeofday(time,0)
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189 #endif
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190
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191 /* According to the Xt sources, some NTP daemons on some systems may
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192 return non-normalized values. */
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193 #define EMACS_GET_TIME(time) \
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194 do { \
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195 EMACS_GETTIMEOFDAY (&(time)); \
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196 EMACS_NORMALIZE_TIME (time); \
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197 } while (0)
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198
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199 #define EMACS_NORMALIZE_TIME(time) \
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200 do { \
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201 while ((time).tv_usec >= 1000000) \
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202 { \
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203 (time).tv_usec -= 1000000; \
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204 (time).tv_sec++; \
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205 } \
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206 while ((time).tv_usec < 0) \
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207 { \
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208 (time).tv_usec += 1000000; \
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209 (time).tv_sec--; \
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210 } \
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211 } while (0)
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212
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213 #define EMACS_ADD_TIME(dest, src1, src2) \
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214 do { \
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215 (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \
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216 (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \
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217 EMACS_NORMALIZE_TIME (dest); \
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218 } while (0)
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219
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220 #define EMACS_SUB_TIME(dest, src1, src2) \
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221 do { \
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222 (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \
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223 (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \
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224 EMACS_NORMALIZE_TIME (dest); \
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225 } while (0)
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226
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227 #define EMACS_TIME_NEG_P(time) ((long)(time).tv_sec < 0)
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228
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229 #define EMACS_TIME_EQUAL(time1, time2) \
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230 ((time1).tv_sec == (time2).tv_sec && \
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231 (time1).tv_usec == (time2).tv_usec)
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232
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233 #define EMACS_TIME_GREATER(time1, time2) \
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234 ((time1).tv_sec > (time2).tv_sec || \
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235 ((time1).tv_sec == (time2).tv_sec && \
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236 (time1).tv_usec > (time2).tv_usec))
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237
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238 #define EMACS_TIME_EQUAL_OR_GREATER(time1, time2) \
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239 ((time1).tv_sec > (time2).tv_sec || \
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240 ((time1).tv_sec == (time2).tv_sec && \
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241 (time1).tv_usec >= (time2).tv_usec))
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242
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243 #define EMACS_SET_SECS_USECS(time, secs, usecs) \
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244 (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
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245
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246 #ifdef emacs
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247 int set_file_times (Lisp_Object path, EMACS_TIME atime, EMACS_TIME mtime);
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248 void get_process_times (double *user_time, double *system_time,
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249 double *real_time);
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250 Ibyte *qxe_ctime (const time_t *value);
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251
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252 #endif
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253
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254 #ifdef WIN32_NATIVE
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255
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256 /* setitimer emulation for Win32 (see win32.c) */
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257
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258 struct itimerval
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259 {
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260 struct timeval it_value;
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261 struct timeval it_interval;
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262 };
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263
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264 #define ITIMER_REAL 1
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265 #define ITIMER_PROF 2
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266
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267 #endif /* WIN32_NATIVE */
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268
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269 #ifdef WIN32_ANY
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270
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271 int mswindows_setitimer (int kind, const struct itimerval *itnew,
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272 struct itimerval *itold);
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273
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274 #endif /* WIN32_ANY */
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275
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276 /* #### Move this comment elsewhere when we figure out the place.
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277
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278 "qxe" is a unique prefix used to identify encapsulations of standard
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279 library functions. We used to play pre-processing games but in
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280 general this leads to nothing but trouble because someone first
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281 encountering the code will have no idea that what appears to be a
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282 call to a library function has actually been redefined to be a call
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283 somewhere else. This is doubly true when the redefinition occurs
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284 in out-of-the way s+m files and only on certainly systems.
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285
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286 The name "qxe" was chosen because it is a unique string that is not
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287 going to be found anywhere else in the sources (unlike, for example,
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288 the prefixes "xemacs" or "sys") and is easy to type. Alternative
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289 names are certainly possible, and suggestions are welcome.
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290
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291 By making the encapsulation explicit we might be making the code
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292 that uses is slightly less pretty, but this is more than compensated
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293 for by the huge increase in clarity.
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294
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295 "Standard library function" can refer to any function in any
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296 standard library. If we are explicitly changing the semantics
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297 (e.g. Mule-encapsulating), we should use an extended version of
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298 the prefix, e.g. perhaps "qxe_xlat_" for functions that Mule-
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299 encapsulate, or "qxe_retry_" for functions that automatically
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300 retry a system call interrupted by EINTR. In general, if there
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301 is no prefix extension, it means the function is trying to
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302 provide (more or less) the same semantics as the standard library
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303 function; but be aware that the reimplementation may be incomplete
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304 or differ in important respects. This is especially the case
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305 when attempts are made to implement Unix functions on MS Windows.
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306
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307 (The comment on the particular encapsulation should describe what
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308 standard function is being emulated, if this is not obvious, and
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309 what the differences, if any, from that standard function are.)
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310
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311 An example of this is the qxe_setitimer() function. This attempts
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312 to emulate the POSIX (Unix98?) standard setitimer(), as found on
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313 all modern versions of Unix. Normally, we just call the system-
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314 provided setitimer() function. When emulated on MS Windows and
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315 Cygwin, however, the ITNEW and ITOLD values cannot be different
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316 from each other if both are non-zero, due to limitations in the
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317 underlying multimedia-timer API. By simply using setitimer() with
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318 preprocessor tricks, a programmer would almost have to be a
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319 mind-reader to figure this out. With the explicit encapsulation, a
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320 programmer need only look at the definition of qxe_setitimer() to
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321 see what its semantics are.
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322 */
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323
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324 int qxe_setitimer (int kind, const struct itimerval *itnew,
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325 struct itimerval *itold);
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326
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8de8e3f6228a Import from CVS: tag r21-2-28
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327 #endif /* INCLUDED_systime_h_ */