use threads;
use threads::shared;

my $KillThread : shared;        
my $FunctionName : shared;       
my $ThreadWork : shared;      
my @ArgumentsThread : shared;     
my $RefResultFunction : shared; 

$ThreadWork = 0;              
$KillThread = 0;    
           
my %FunctionsToLaunchThread  = ( "run_script" =>\&run_script );
# Creation of thread
my $Thread = threads->create( \&WorkThread );

sub load {
......some code......
$run_button->configure(-command =>[ (\&runtk, $paste_text)],-state => 'normal');

......some code....
}

sub runtk 
{
    my $temp = $_[0],
    $FunctionName = "run_script"; 
    @ArgumentsThread = ($temp);  
    $ThreadWork   = 1;            
    
    $run_button->configure(-state => "disabled");
    
   
    while ( $ThreadWork == 1 ) {
      sleep 0.2;
      $f->update;
    }


     $run_button->configure(-state => "normal");
    
}

sub run_script{

open (MYFILE1, "subroutines.txt");
my @sub_lines = <MYFILE1>;

my $current =  localtime(time);
#print "Current date and time is $current";
  
use POSIX qw(strftime);
my $now_string = strftime "%d-%b-%Y--%T", localtime;
print $now_string;


my $str ="$now_string.txt";
print $str;
open FILE, "+>>Test_Results/$str" or die $!;


 
do "add.pl";


use Device::Modem::GSM;

 my $modem = new Device::Modem::GSM( port => "/dev/$port_global",log => "file,$now_string.log",
                                                          loglevel => 'debug',  # default is 'warning'                                                     );

sub WorkThread {

  
  while (1) {

 if ( $ThreadWork == 1 ) {

 $FunctionsToLaunchThread{$FunctionName}->@ArgumentsThread);
         
 $ThreadWork = 0;
    }
last if ( $KillThread == 1 );

  sleep 0.5;
  }
  return;
}