coldguy was right, you cannot use a reference as a hash key. Also, I don't think you can use unlink on a filehandle ... just a filename. If you want to stay the same path, I would just expand your structure a bit:

#!/usr/local/bin/perl

use strict;

my $files = [
  { name => 'file1.txt', fh => undef, unlink => 1 },
  { name => 'file2.txt', fh => undef, unlink => 1 },
  { name => 'file3.txt', fh => undef, unlink => 1 },
];

foreach my $file ( @$files ) {
  open( $file->{fh}, '>', $file->{name} ) 
    or quit( $files, "Cannot open $file->{name}: $!" );
}

quit( $files, "CloseUnlinkTest.pl finished" );


sub quit {
  my( $files, $message ) = @_;

  foreach my $file ( @$files ) {
    close( $file->{fh} ) if $file->{fh};
    unlink( $file->{name} ) if $file->{unlink};
  }
}
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