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markom |
'\"
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'\" Copyright (c) 1989-1993 The Regents of the University of California.
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'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
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'\"
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'\" See the file "license.terms" for information on usage and redistribution
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'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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'\"
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'\" RCS: @(#) $Id: SetRecLmt.3,v 1.1.1.1 2002-01-16 10:25:24 markom Exp $
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'\"
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.so man.macros
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.TH Tcl_SetRecursionLimit 3 7.0 Tcl "Tcl Library Procedures"
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.BS
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.SH NAME
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Tcl_SetRecursionLimit \- set maximum allowable nesting depth in interpreter
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.SH SYNOPSIS
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.nf
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\fB#include \fR
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.sp
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int
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\fBTcl_SetRecursionLimit\fR(\fIinterp, depth\fR)
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.SH ARGUMENTS
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.AS Tcl_Interp *interp
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.AP Tcl_Interp *interp in
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Interpreter whose recursion limit is to be set.
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Must be greater than zero.
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.AP int depth in
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New limit for nested calls to \fBTcl_Eval\fR for \fIinterp\fR.
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.BE
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.SH DESCRIPTION
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.PP
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At any given time Tcl enforces a limit on the number of recursive
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calls that may be active for \fBTcl_Eval\fR and related procedures
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such as \fBTcl_GlobalEval\fR.
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Any call to \fBTcl_Eval\fR that exceeds this depth is aborted with
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an error.
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By default the recursion limit is 1000.
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.PP
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\fBTcl_SetRecursionLimit\fR may be used to change the maximum
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allowable nesting depth for an interpreter.
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The \fIdepth\fR argument specifies a new limit for \fIinterp\fR,
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and \fBTcl_SetRecursionLimit\fR returns the old limit.
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To read out the old limit without modifying it, invoke
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\fBTcl_SetRecursionDepth\fR with \fIdepth\fR equal to 0.
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.PP
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The \fBTcl_SetRecursionLimit\fR only sets the size of the Tcl
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call stack: it cannot by itself prevent stack overflows on the
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C stack being used by the application. If your machine has a
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limit on the size of the C stack, you may get stack overflows
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before reaching the limit set by \fBTcl_SetRecursionLimit\fR.
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If this happens, see if there is a mechanism in your system for
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increasing the maximum size of the C stack.
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.SH KEYWORDS
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nesting depth, recursion
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