'\" '\" Copyright (c) 1989-1993 The Regents of the University of California. '\" Copyright (c) 1994-1996 Sun Microsystems, Inc. '\" '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" '\" RCS: @(#) $Id: SetRecLmt.3,v 1.2 2001/09/14 01:42:15 zlaski Exp $ '\" .so man.macros .TH Tcl_SetRecursionLimit 3 7.0 Tcl "Tcl Library Procedures" .BS .SH NAME Tcl_SetRecursionLimit \- set maximum allowable nesting depth in interpreter .SH SYNOPSIS .nf \fB#include <tcl.h>\fR .sp int \fBTcl_SetRecursionLimit\fR(\fIinterp, depth\fR) .SH ARGUMENTS .AS Tcl_Interp *interp .AP Tcl_Interp *interp in Interpreter whose recursion limit is to be set. Must be greater than zero. .AP int depth in New limit for nested calls to \fBTcl_Eval\fR for \fIinterp\fR. .BE .SH DESCRIPTION .PP At any given time Tcl enforces a limit on the number of recursive calls that may be active for \fBTcl_Eval\fR and related procedures such as \fBTcl_GlobalEval\fR. Any call to \fBTcl_Eval\fR that exceeds this depth is aborted with an error. By default the recursion limit is 1000. .PP \fBTcl_SetRecursionLimit\fR may be used to change the maximum allowable nesting depth for an interpreter. The \fIdepth\fR argument specifies a new limit for \fIinterp\fR, and \fBTcl_SetRecursionLimit\fR returns the old limit. To read out the old limit without modifying it, invoke \fBTcl_SetRecursionDepth\fR with \fIdepth\fR equal to 0. .PP The \fBTcl_SetRecursionLimit\fR only sets the size of the Tcl call stack: it cannot by itself prevent stack overflows on the C stack being used by the application. If your machine has a limit on the size of the C stack, you may get stack overflows before reaching the limit set by \fBTcl_SetRecursionLimit\fR. If this happens, see if there is a mechanism in your system for increasing the maximum size of the C stack. .SH KEYWORDS nesting depth, recursion