| 1 | '\" |
| 2 | '\" Copyright (c) 1993 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: CallDel.3,v 1.2 1998/09/14 18:39:46 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? |
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| 15 | '\" type is type of argument (int, etc.), in/out is either "in", "out", |
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| 20 | '\" .AS ?type? ?name? |
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| 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 |
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| 77 | '\" # Start an argument description |
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| 177 | .el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c |
| 178 | .\} |
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| 181 | \kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c |
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| 206 | '\" # SO - start of list of standard options |
| 207 | .de SO |
| 208 | .SH "STANDARD OPTIONS" |
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| 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 |
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| 226 | Command-Line Name: \\fB\\$1\\fR |
| 227 | Database Name: \\fB\\$2\\fR |
| 228 | Database Class: \\fB\\$3\\fR |
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| 243 | .de UL |
| 244 | \\$1\l'|0\(ul'\\$2 |
| 245 | .. |
| 246 | .TH Tcl_CallWhenDeleted 3 7.0 Tcl "Tcl Library Procedures" |
| 247 | .BS |
| 248 | .SH NAME |
| 249 | Tcl_CallWhenDeleted, Tcl_DontCallWhenDeleted \- Arrange for callback when interpreter is deleted |
| 250 | .SH SYNOPSIS |
| 251 | .nf |
| 252 | \fB#include <tcl.h>\fR |
| 253 | .sp |
| 254 | \fBTcl_CallWhenDeleted\fR(\fIinterp\fR, \fIproc\fR, \fIclientData\fR) |
| 255 | .sp |
| 256 | \fBTcl_DontCallWhenDeleted\fR(\fIinterp\fR, \fIproc\fR, \fIclientData\fR) |
| 257 | .SH ARGUMENTS |
| 258 | .AS Tcl_InterpDeleteProc clientData |
| 259 | .AP Tcl_Interp *interp in |
| 260 | Interpreter with which to associated callback. |
| 261 | .AP Tcl_InterpDeleteProc *proc in |
| 262 | Procedure to call when \fIinterp\fR is deleted. |
| 263 | .AP ClientData clientData in |
| 264 | Arbitrary one-word value to pass to \fIproc\fR. |
| 265 | .BE |
| 266 | |
| 267 | .SH DESCRIPTION |
| 268 | .PP |
| 269 | \fBTcl_CallWhenDeleted\fR arranges for \fIproc\fR to be called by |
| 270 | \fBTcl_DeleteInterp\fR if/when \fIinterp\fR is deleted at some future |
| 271 | time. \fIProc\fR will be invoked just before the interpreter |
| 272 | is deleted, but the interpreter will still be valid at the |
| 273 | time of the call. |
| 274 | \fIProc\fR should have arguments and result that match the |
| 275 | type \fBTcl_InterpDeleteProc\fR: |
| 276 | .CS |
| 277 | typedef void Tcl_InterpDeleteProc( |
| 278 | ClientData \fIclientData\fR, |
| 279 | Tcl_Interp *\fIinterp\fR); |
| 280 | .CE |
| 281 | The \fIclientData\fR and \fIinterp\fR parameters are |
| 282 | copies of the \fIclientData\fR and \fIinterp\fR arguments given |
| 283 | to \fBTcl_CallWhenDeleted\fR. |
| 284 | Typically, \fIclientData\fR points to an application-specific |
| 285 | data structure that \fIproc\fR uses to perform cleanup when an |
| 286 | interpreter is about to go away. |
| 287 | \fIProc\fR does not return a value. |
| 288 | .PP |
| 289 | \fBTcl_DontCallWhenDeleted\fR cancels a previous call to |
| 290 | \fBTcl_CallWhenDeleted\fR with the same arguments, so that |
| 291 | \fIproc\fR won't be called after all when \fIinterp\fR is |
| 292 | deleted. |
| 293 | If there is no deletion callback that matches \fIinterp\fR, |
| 294 | \fIproc\fR, and \fIclientData\fR then the call to |
| 295 | \fBTcl_DontCallWhenDeleted\fR has no effect. |
| 296 | |
| 297 | .SH KEYWORDS |
| 298 | callback, delete, interpreter |