| 1 | '\" |
| 2 | '\" Copyright (c) 1990 The Regents of the University of California. |
| 3 | '\" Copyright (c) 1994-1996 Sun Microsystems, Inc. |
| 4 | '\" |
| 5 | '\" See the file "license.terms" for information on usage and redistribution |
| 6 | '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 7 | '\" |
| 8 | '\" RCS: @(#) $Id: CrtTimerHdlr.3,v 1.2 1998/09/14 18:39:47 stanton Exp $ |
| 9 | '\" |
| 10 | '\" The definitions below are for supplemental macros used in Tcl/Tk |
| 11 | '\" manual entries. |
| 12 | '\" |
| 13 | '\" .AP type name in/out ?indent? |
| 14 | '\" Start paragraph describing an argument to a library procedure. |
| 15 | '\" type is type of argument (int, etc.), in/out is either "in", "out", |
| 16 | '\" or "in/out" to describe whether procedure reads or modifies arg, |
| 17 | '\" and indent is equivalent to second arg of .IP (shouldn't ever be |
| 18 | '\" needed; use .AS below instead) |
| 19 | '\" |
| 20 | '\" .AS ?type? ?name? |
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| 23 | '\" to .AP later. If args are omitted, default tab stops are used. |
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| 25 | '\" .BS |
| 26 | '\" Start box enclosure. From here until next .BE, everything will be |
| 27 | '\" enclosed in one large box. |
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| 32 | '\" .CS |
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| 37 | '\" |
| 38 | '\" .VS ?version? ?br? |
| 39 | '\" Begin vertical sidebar, for use in marking newly-changed parts |
| 40 | '\" of man pages. The first argument is ignored and used for recording |
| 41 | '\" the version when the .VS was added, so that the sidebars can be |
| 42 | '\" found and removed when they reach a certain age. If another argument |
| 43 | '\" is present, then a line break is forced before starting the sidebar. |
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| 54 | '\" .SO |
| 55 | '\" Start of list of standard options for a Tk widget. The |
| 56 | '\" options follow on successive lines, in four columns separated |
| 57 | '\" by tabs. |
| 58 | '\" |
| 59 | '\" .SE |
| 60 | '\" End of list of standard options for a Tk widget. |
| 61 | '\" |
| 62 | '\" .OP cmdName dbName dbClass |
| 63 | '\" Start of description of a specific option. cmdName gives the |
| 64 | '\" option's name as specified in the class command, dbName gives |
| 65 | '\" the option's name in the option database, and dbClass gives |
| 66 | '\" the option's class in the option database. |
| 67 | '\" |
| 68 | '\" .UL arg1 arg2 |
| 69 | '\" Print arg1 underlined, then print arg2 normally. |
| 70 | '\" |
| 71 | '\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $ |
| 72 | '\" |
| 73 | '\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages. |
| 74 | .if t .wh -1.3i ^B |
| 75 | .nr ^l \n(.l |
| 76 | .ad b |
| 77 | '\" # Start an argument description |
| 78 | .de AP |
| 79 | .ie !"\\$4"" .TP \\$4 |
| 80 | .el \{\ |
| 81 | . ie !"\\$2"" .TP \\n()Cu |
| 82 | . el .TP 15 |
| 83 | .\} |
| 84 | .ta \\n()Au \\n()Bu |
| 85 | .ie !"\\$3"" \{\ |
| 86 | \&\\$1 \\fI\\$2\\fP (\\$3) |
| 87 | .\".b |
| 88 | .\} |
| 89 | .el \{\ |
| 90 | .br |
| 91 | .ie !"\\$2"" \{\ |
| 92 | \&\\$1 \\fI\\$2\\fP |
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| 95 | \&\\fI\\$1\\fP |
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| 100 | .de AS |
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| 106 | .nr )C \\n()Bu+\\w'(in/out)'u+2n |
| 107 | .. |
| 108 | .AS Tcl_Interp Tcl_CreateInterp in/out |
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| 110 | '\" # ^y = starting y location |
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| 129 | .\" box if the box started on an earlier page. |
| 130 | .ie !\\n(^b-1 \{\ |
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| 132 | .\} |
| 133 | .el \}\ |
| 134 | \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul' |
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| 142 | '\" # ^Y = starting y location |
| 143 | '\" # ^v = 1 (for troff; for nroff this doesn't matter) |
| 144 | .de VS |
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| 158 | \h'|\\n(^lu+3n'\L'|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-|\\n(^lu+3n' |
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| 166 | '\" # box/sidebar if in box/sidebar mode, then invoked standard |
| 167 | '\" # page bottom macro. |
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| 174 | .\" Draw three-sided box if this is the box's first page, |
| 175 | .\" draw two sides but no top otherwise. |
| 176 | .ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c |
| 177 | .el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c |
| 178 | .\} |
| 179 | .if \\n(^v \{\ |
| 180 | .nr ^x \\n(^tu+1v-\\n(^Yu |
| 181 | \kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c |
| 182 | .\} |
| 183 | .bp |
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| 186 | .if \\n(^b \{\ |
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| 203 | .RE |
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| 205 | .. |
| 206 | '\" # SO - start of list of standard options |
| 207 | .de SO |
| 208 | .SH "STANDARD OPTIONS" |
| 209 | .LP |
| 210 | .nf |
| 211 | .ta 5.5c 11c |
| 212 | .ft B |
| 213 | .. |
| 214 | '\" # SE - end of list of standard options |
| 215 | .de SE |
| 216 | .fi |
| 217 | .ft R |
| 218 | .LP |
| 219 | See the \\fBoptions\\fR manual entry for details on the standard options. |
| 220 | .. |
| 221 | '\" # OP - start of full description for a single option |
| 222 | .de OP |
| 223 | .LP |
| 224 | .nf |
| 225 | .ta 4c |
| 226 | Command-Line Name: \\fB\\$1\\fR |
| 227 | Database Name: \\fB\\$2\\fR |
| 228 | Database Class: \\fB\\$3\\fR |
| 229 | .fi |
| 230 | .IP |
| 231 | .. |
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| 242 | .. |
| 243 | .de UL |
| 244 | \\$1\l'|0\(ul'\\$2 |
| 245 | .. |
| 246 | .TH Tcl_CreateTimerHandler 3 7.5 Tcl "Tcl Library Procedures" |
| 247 | .BS |
| 248 | .SH NAME |
| 249 | Tcl_CreateTimerHandler, Tcl_DeleteTimerHandler \- call a procedure at a |
| 250 | given time |
| 251 | .SH SYNOPSIS |
| 252 | .nf |
| 253 | \fB#include <tcl.h>\fR |
| 254 | .sp |
| 255 | Tcl_TimerToken |
| 256 | \fBTcl_CreateTimerHandler\fR(\fImilliseconds, proc, clientData\fR) |
| 257 | .sp |
| 258 | \fBTcl_DeleteTimerHandler\fR(\fItoken\fR) |
| 259 | .SH ARGUMENTS |
| 260 | .AS Tcl_TimerToken milliseconds |
| 261 | .AP int milliseconds in |
| 262 | How many milliseconds to wait before invoking \fIproc\fR. |
| 263 | .AP Tcl_TimerProc *proc in |
| 264 | Procedure to invoke after \fImilliseconds\fR have elapsed. |
| 265 | .AP ClientData clientData in |
| 266 | Arbitrary one-word value to pass to \fIproc\fR. |
| 267 | .AP Tcl_TimerToken token in |
| 268 | Token for previously-created timer handler (the return value |
| 269 | from some previous call to \fBTcl_CreateTimerHandler\fR). |
| 270 | .BE |
| 271 | |
| 272 | .SH DESCRIPTION |
| 273 | .PP |
| 274 | \fBTcl_CreateTimerHandler\fR arranges for \fIproc\fR to be |
| 275 | invoked at a time \fImilliseconds\fR milliseconds in the |
| 276 | future. |
| 277 | The callback to \fIproc\fR will be made by \fBTcl_DoOneEvent\fR, |
| 278 | so \fBTcl_CreateTimerHandler\fR is only useful in programs that |
| 279 | dispatch events through \fBTcl_DoOneEvent\fR or through Tcl commands |
| 280 | such as \fBvwait\fR. |
| 281 | The call to \fIproc\fR may not be made at the exact time given by |
| 282 | \fImilliseconds\fR: it will be made at the next opportunity |
| 283 | after that time. For example, if \fBTcl_DoOneEvent\fR isn't |
| 284 | called until long after the time has elapsed, or if there |
| 285 | are other pending events to process before the call to |
| 286 | \fIproc\fR, then the call to \fIproc\fR will be delayed. |
| 287 | .PP |
| 288 | \fIProc\fR should have arguments and return value that match |
| 289 | the type \fBTcl_TimerProc\fR: |
| 290 | .CS |
| 291 | typedef void Tcl_TimerProc(ClientData \fIclientData\fR); |
| 292 | .CE |
| 293 | The \fIclientData\fR parameter to \fIproc\fR is a |
| 294 | copy of the \fIclientData\fR argument given to |
| 295 | \fBTcl_CreateTimerHandler\fR when the callback |
| 296 | was created. Typically, \fIclientData\fR points to a data |
| 297 | structure containing application-specific information about |
| 298 | what to do in \fIproc\fR. |
| 299 | .PP |
| 300 | \fBTcl_DeleteTimerHandler\fR may be called to delete a |
| 301 | previously-created timer handler. It deletes the handler |
| 302 | indicated by \fItoken\fR so that no call to \fIproc\fR |
| 303 | will be made; if that handler no longer exists |
| 304 | (e.g. because the time period has already elapsed and \fIproc\fR |
| 305 | has been invoked then \fBTcl_DeleteTimerHandler\fR does nothing. |
| 306 | The tokens returned by \fBTcl_CreateTimerHandler\fR never have |
| 307 | a value of NULL, so if NULL is passed to \fBTcl_DeleteTimerHandler\fR |
| 308 | then the procedure does nothing. |
| 309 | |
| 310 | .SH KEYWORDS |
| 311 | callback, clock, handler, timer |