Hello everyone,

I have constructed this piece of code to illustrate three problems and I would like to know: How would you write this code so that it works?

Problem 1: The join is located at a problematic position due to the nature of how hashes work. Sometimes the code takes 6 seconds to execute and sometimes 2 + 6 seconds.

Problem 2: L2_counter1 => 3 is not incremented

Problem 3: (Is actually a question) Why do I need to use a share? The data is incremented independently, so I would think there should be no problems regards synchronicity. However if I don't use the share, nothing gets incremented at all...

Here is the code:

use strict ;
use warnings ;

use MCE::Hobo ;
use MCE::Shared ;

use Data::Dumper ;

sub task1 {
    print "Starting task 1 for $_[0]\n" ;
    sleep(2) ;
    print "Finished task 1 for $_[0]\n" ;
}

sub task2 {
    print "Starting task 2 for $_[0]\n" ;
    sleep(4) ;
    print "Finished task 2 for $_[0]\n" ;
}

sub task3 {
    print "Starting task 3 for $_[0]\n" ;
    sleep(6) ;
    print "Finished task 3 for $_[0]\n" ;
}

MCE::Hobo->init(
    max_workers => 2,
#     hobo_timeout => 10,
#     posix_exit => 1,
) ;

my $mutex = MCE::Mutex->new;

my $_test = {
    L1_counter1 => 1,
    # L1_counter2 => 2,
    # L1_counter3 => 3,
    nested1 => {
        L2_counter1 => 3,
        # L2_counter2 => 2,
        # L2_counter3 => 1,
    },
} ;

my $test ;
tie %{$test}, 'MCE::Shared', { module => 'MCE::Shared::Hash' }, %{$_te
+st} ;
print Dumper( $test ) ;

sub executeTasks {
    my $in = $_[0] ;
    my $hobo ;
    foreach( keys %{$in} ) {
        if ( ref $in->{ $_ } eq 'HASH' ) {
            executeTasks( $in->{ $_ } ) ;
        } else {
            if ( $in->{ $_ } == 1 ) {
                $hobo = mce_async {
                    task1( $_ ) ;
                    ++$in->{ $_ } ;
                } ;
            } elsif ( $in->{ $_ } == 2 ) {
                $hobo = mce_async {
                    task2( $_ ) ;
                    ++$in->{ $_ } ;
                } ;
            } elsif ( $in->{ $_ } == 3 ) {
                $hobo = mce_async {
                    task3( $_ ) ;
                    ++$in->{ $_ } ;
                } ;
            } ;
        } ;
    } ;
    $hobo->join() ;
} ;
executeTasks( $test ) ;
print "\n" ;
print Dumper( $test ) ;
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