Question

免责声明：今天的硬件就是这样，我不需要花一段时间，所以我可能需要一些关于以下代码的建议。以下是一个简单的例子，而不是实际的代码。

my @matched;
my @names = qw/jim john sally/;

foreach my $name (@names) {
   my $pid;
   next if $pid = fork;                                # child birth
   croak "Fork failed: $!" if not defined $pid;        # terminate if child wasn't born

   my $result = `command_to_get_some_list_of_names`;   # sam sue john tyler
   my @list   = split /\s/, $result;

   foreach my $match ( @list ){
      push(@matched,$match) if $name eq $match;        # where want to access parent array
   }

   exit;                                               # child funeral
}

1 while (wait() != -1);                                # wait for children to finish playing

say "Matched: @matched";                               # nothing; not desired, but expected

有一些匹配，并且@matched正在填充，但是从我记忆中，fork创建了父母的副本和我不知道的内容（我不确定是否我曾经这样做是如何访问父母的资源。我认为更简单的方法是在文件系统上创建一个临时文件，但我想避免任何外部文件。

是否有替代fork为线程提供本机途径？

Answer 1

带有Forks::Super选项的

share使这很简单：

use Carp;
use 5.012;
use Forks::Super;
my @matched;
my @names = qw/jim john sally/;

foreach my $name (@names) {
   my $pid = fork {
     share => [ \@matched ],
     sub => sub {
       #croak "Fork failed: $!" if not defined $pid;

       my $result = "sam sue john tyler";             # sam sue john tyler
       my @list   = split /\s/, $result;

       foreach my $match ( @list ){
           push(@matched,$match) if $name eq $match;  # where want to access parent array
       }
     }
   };
}

waitall;                                              # wait for children to finish playing

say "Matched: @matched";                              # nothing; not desired,

结果：

Matched: john

Perl：分叉和填充父数组

1 个答案: