[OpenSPARC-T2-DV] / tools / src / nas,5.n2.os.2 / lib / python / man / man3 / Tcl_DeleteTimerHandler.3

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.TH Tcl_CreateTimerHandler 3 7.5 Tcl "Tcl Library Procedures"
.BS
.SH NAME
Tcl_CreateTimerHandler, Tcl_DeleteTimerHandler \- call a procedure at a
given time
.SH SYNOPSIS
.nf
\fB#include <tcl.h>\fR
.sp
Tcl_TimerToken
\fBTcl_CreateTimerHandler\fR(\fImilliseconds, proc, clientData\fR)
.sp
\fBTcl_DeleteTimerHandler\fR(\fItoken\fR)
.SH ARGUMENTS
.AS Tcl_TimerToken milliseconds
.AP int milliseconds  in
How many milliseconds to wait before invoking \fIproc\fR.
.AP Tcl_TimerProc *proc in
Procedure to invoke after \fImilliseconds\fR have elapsed.
.AP ClientData clientData in
Arbitrary one-word value to pass to \fIproc\fR.
.AP Tcl_TimerToken token in
Token for previously-created timer handler (the return value
from some previous call to \fBTcl_CreateTimerHandler\fR).
.BE

.SH DESCRIPTION
.PP
\fBTcl_CreateTimerHandler\fR arranges for \fIproc\fR to be
invoked at a time \fImilliseconds\fR milliseconds in the
future.
The callback to \fIproc\fR will be made by \fBTcl_DoOneEvent\fR,
so \fBTcl_CreateTimerHandler\fR is only useful in programs that
dispatch events through \fBTcl_DoOneEvent\fR or through Tcl commands
such as \fBvwait\fR.
The call to \fIproc\fR may not be made at the exact time given by
\fImilliseconds\fR:  it will be made at the next opportunity
after that time.  For example, if \fBTcl_DoOneEvent\fR isn't
called until long after the time has elapsed, or if there
are other pending events to process before the call to
\fIproc\fR, then the call to \fIproc\fR will be delayed.
.PP
\fIProc\fR should have arguments and return value that match
the type \fBTcl_TimerProc\fR:
.CS
typedef void Tcl_TimerProc(ClientData \fIclientData\fR);
.CE
The \fIclientData\fR parameter to \fIproc\fR is a
copy of the \fIclientData\fR argument given to
\fBTcl_CreateTimerHandler\fR when the callback
was created.  Typically, \fIclientData\fR points to a data
structure containing application-specific information about
what to do in \fIproc\fR.
.PP
\fBTcl_DeleteTimerHandler\fR may be called to delete a
previously-created timer handler.  It deletes the handler
indicated by \fItoken\fR so that no call to \fIproc\fR
will be made;  if that handler no longer exists
(e.g. because the time period has already elapsed and \fIproc\fR
has been invoked then \fBTcl_DeleteTimerHandler\fR does nothing.
The tokens returned by \fBTcl_CreateTimerHandler\fR never have
a value of NULL, so if NULL is passed to \fBTcl_DeleteTimerHandler\fR
then the procedure does nothing.

.SH KEYWORDS
callback, clock, handler, timer
Commit	Line	Data
86530b38 AT	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.
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	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)
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	22	'\" name are examples of largest possible arguments that will be passed
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	61	'\"
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	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	'\"
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69	'\" Print arg1 underlined, then print arg2 normally.
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74	.if t .wh -1.3i ^B
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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