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Top Forums Shell Programming and Scripting Keep a certain number of background processes running Post 302280647 by rwuerth on Tuesday 27th of January 2009 10:29:47 AM
Old 01-27-2009
I don't see any procedure to decrement your counter variable once inside the loop. So if one process stops, the counter should decrement by 1 and then you would launch another process.

But what confuses me, is how does your script ever get out of the 'if' test once you've reached four concurrent processes?

Last edited by rwuerth; 01-27-2009 at 12:08 PM.. Reason: correcting grammar & spelling.
 

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local(n)							    [incr Tcl]								  local(n)

__________________________________________________________________________________________________________________________________________________

NAME
local - create an object local to a procedure SYNOPSIS
itcl::local className objName ?arg arg ...? _________________________________________________________________ DESCRIPTION
The local command creates an [incr Tcl] object that is local to the current call frame. When the call frame goes away, the object is auto- matically deleted. This command is useful for creating objects that are local to a procedure. As a side effect, this command creates a variable named "itcl-local-xxx", where xxx is the name of the object that is created. This vari- able detects when the call frame is destroyed and automatically deletes the associated object. EXAMPLE
In the following example, a simple "counter" object is used within the procedure "test". The counter is created as a local object, so it is automatically deleted each time the procedure exits. The puts statements included in the constructor/destructor show the object coming and going as the procedure is called. itcl::class counter { private variable count 0 constructor {} { puts "created: $this" } destructor { puts "deleted: $this" } method bump {{by 1}} { incr count $by } method get {} { return $count } } proc test {val} { local counter x for {set i 0} {$i < $val} {incr i} { x bump } return [x get] } set result [test 5] puts "test: $result" set result [test 10] puts "test: $result" puts "objects: [itcl::find objects *]" KEYWORDS
class, object, procedure itcl local(n)
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